From what I've read, the sweet spot for the TPA3116 is right around 19 volts. If you provide some 4700 uF caps in the supply, you may also get better sound. I hope you make a video when you hook it up to your main speakers. It would also be interesting to see how much difference there is between Bluetooth and line-in.
BlankBrain same amplifier I'm connect 12volt 3a supply and load 15watt each channel but sound not working in speaker it's any falt other wise Can improve my voltage and amperes ?
After trying three TPA3116D2 based amplifiers I ran into the same conclusions as "BlankBrain's" I operated the amps off 19 Volt 4.7A Dell laptop PSU's with 4700uf filter caps, Alternatively used wired and BT input sources. Sound great. FYI! on public domain sites there are 3D printing plans for cases that fit some of those Bluetooth TPA3116 amps. I tested with Definitive Technology surplus bass drivers and had to apologize to the neighbors. They claimed their dogs filed for relocation.
@@avrahamchamish521 I concur as well. If you want a really well made laptop supply then the best I have come across are the Toshiba ones. Beautifully made and properly screened. I have a few Dell supplies here but haven't tried them - not least because they are attached to laptops and might be missed. Also they don't have the standard barrel connector. But they should be decently made too, but the Toshiba ones are exquisite. I was really surprised how much went into them.
I've built two ammo-box bluetooth speakers using coaxial speakers made for cars, works really well. I'm powering them by a 7,2Ah AGM battery and mounted a charger inside the box with a "cicle of eight" connector for 110/200V on the outside. Also mounted a small LDC panel showing remaining battery. Since the steel box acts a bit like a Faraday cage, I had to solder a tine coaxial cable to where the base of the surface mounted antenna on the board were, scrape off the rail, thus deactivating the original antenna. The cable I soldered I then connected to a Wifi connector that I mounted on the box and then a Wifi antenna on the outside (Both bluetooth and Wifi uses 2,4Ghz so it's perfect). Works quite well and has both good range and power, even though I could only mount one battery in the box because of limited space, two batteries giving 24V would be better.
Your 1/4 wavelength at 2.4Ghz used commonly is 31.25mm which is 1.23", not 1.5" And considering BT is 2.45Ghz, that length is closer to 1.20". Trim your wire a bit and you may increase your range slightly. Best to cut that PCB squiggle and attach there a short run of coax center and ground that should be available and run that to an antenna that is a minimum of 1/4 wavelength away from the dome-peak of the electronics to reduce the floor interference. Thanks for the video, by the way.
Excellent analysis, made my day I am building a 5.1 system and isolating woofer completely paired with it's own amp, this helped me decide on what configuration to use as I am using 12V to make it portable as well with a Li-po battery pack. So in theory I should still be getting ~50/~50 L/R with ~50W 2.1 channel or 2x(50W+50W) + 2x(~50W) making part of the system portable while keeping overall performance good enough.
Thanks for the update, I just purchased one off Amazon. My wife wants an expensive surround sound to play movies off her phone. I have about 5 older speakers from an old surround sound system. Badda'Bing'Badda' Boom. I hope I can get this going for 19.99. Lol
Hi , You mean Audio Ode? like Alternative Audio output? Hope to answer this question because i have this board also and i want to add more mini amplifier to this board
I can't believe the difference that 1 1/2" wire made. I figured it would get slightly better but not as good as it did. Your neighbor was looking at you like, "what the heck is Dave doing now?"
Great info. Thanks for talking about this being a balanced output. I wasn't aware that I couldn't use a common ground. I bought a new speaker that likely has switches and such. I didn't know they bridged negative wires together which would cause amplifier failure. Thanks.
I bought one per your recommendation! I mounted it on back of some Bose bookshelf speakers I was not using that I got off ebay! Got it paired with my chrome book it sounds and works great very pleased. Thanks!!
I'm kind of new to electronics, am I missing something? 120 watts per Channel??? 12 V. Power supply.... is that thing pulling 10 amps? Or at 24 volts pulling 5 amps? I know the thing has inductors but, if the amperage isn't there it's not there! So where does the wattage come from? One more question? 12 volts X 10 amps =120watts. So that accounts for one channel 120 watts. You said something about the inductor alternating? Does that mean the 120 watts is alternating from left to right channels, using the inductor/s? Thanks Dave. it's an honest question I'm not being a jerk!
The way they calculate this is into a 4 ohm load. This power is also rated at the full working voltage of 24 or 26 volts not 12. Look up the specs of the chip. Also it is a BTL output. Each leg should be able to put out 50 watts. Remember that the speaker terminals are driven out of phase with each other so one side goes + while the other - and then they flip. Class D are very efficient so all the way of thinking and calculating power used on linear amplifiers goes out the window. These are pwm amplifiers and efficiencies are gained through those inductors.
Yes 30 feet is suposed to be maximum. That would be from the front door of the garage to the street, as I am set back 30 feet. The receiver was at the back of the garage, a good 40 feet from the road, and I crossed the road with it, so yes it dis make a huge improvement.
My own tests on this unit are as follows: Needs the antenna mod shown in this video but that makes the Bluetooth work great. Very easy mod to do, see this excellent video. Comparing it to a SE EL84 tube amp, both capable of low volume good involving sound without fatigue or need to turn it up. This digital amp on a 24 volt 2.7 amp laptop power supply begins to clip symmetrically at 2 volts RMS with 8 ohm load, odd harmonics, so 1/2 watt per channel. Very similar power to my SE tube amp. Frequency response flat 60 - 18,000 HZ. Mild roll off at 40HZ, more at 20HZ, but still some signal there. The SE tube with much more low end slam than this despite equivalent watts. My speakers only go down to 50 HZ so bass is not what I am after. Will actually use this amp, I think, as it is very good sounding at low volume for near field listening. Convenient Bluetooth implementation. I think it sounds just a little better on 19 volts than 24.
I just love these credit card sized BT Amps. If you ask me, this video could have easily doubled in time and I'd be happy, but still a great video. I have one that uses the tracks from the PCB and they set the BT module on the PCB and used the tracks on the board as a antenna, they did use liquid tin not solder and that allows me to go all over the house and outside and I have real aluminum siding.
Hands up for this review.. thank you sir for this video 👍🙌... it is helping me.. because im going to purchase this Bluetooth amplifier... you are a specialist... keep on sharing.... and thank yoy 😊...
this board is great!! powering it with a 4s lipo and it has bunch of power at 8 ohms. starts to distort easily at 15 volts, i will add a voltage booster and set it to 25v
Thanks for the review! The one thing that I don't readily find on these boards ( Amazon and so on ) is if they have that annoying "Blue Tooth Audio" voice. Maybe I missed it, but is there an on-off switch? Does it pop when you turn it on or off? And how do you think the Bluetooth performance will be once it's maybe mounted inside of an enclosure?
Hi there I've just bought one of these in the UK after seeing your video. 👍. Was wondering though if I used just a 12v power supply would the output wattage power still be 120w per channel or would it be less. Cheers John
It would be less. Supply voltage determines the p-p swing of the speaker voltage. 24v will allow for 24v p-p voltage swings per output rail. 12v would cut the output voltage in half so half power everything else being equal.
RMS power is .707 peak. I did ohms law, on 24 volts, and an 8 ohm load...would be 72 watts (flooded) and .707 that is 50.9 watts rms max per board. So I'm thinkin' 120 watts per channel, is peak to peak rating. A lot of audio companies list this rating, and I grew up on classic electronics, so ohms law and i squared r always comes to mind for power.
Well, almost. The 24V is DC so that is + or - 12V peak. 0.707 of that is 8.something Volts, giving 9W. So how do they get to 50W or even 120W? Well, it's actually rated for a peak of about 26V DC, if I remember correctly, but the main thing is that each channel here is bridged, giving you twice the voltage range, and so 4x the power. But that's still only 36W and we still haven't taken into account the dropout voltage. So they spec it into 4 ohms to double the power, and 50W is then, possibly, a reasonable spec. For 120W they put both channels in parallel and they spec it into 2 ohms. You need a 2 ohm speaker to achieve it, of course. At all these high levels you are really thrashing the amplifier (and it would have been nice to see him put some sine waves on a scope driving various load resistors to see if it can really manage it). In fact, on the scope topic, it would have been nice if he had the slightest clue about what he was doing, or how these things worked. I have run a couple of these off a standard 19.xV laptop supply and that's probably a comfortable supply level to give it. It's likely to last longer than going to the full 26+V.
Hi , great review...i have the board also and you mention that the out put where you solder the ground on, also an input can be.....did you try that out?...i like to hook this up to my broken active loudspeakers but i want no latency, for music playing purpose ..thanks in advance Jody
I'm making a set of two speakers and building in one of BangGood houses Sanwu Bluetooth and amp boards. The one I chose has remote control over infrared.
Really excellent video! For the audio waveform demo at 28:40 you point out 24 volts on scope. Were your leads across the speaker out terminals, and measuring entire balanced output voltage, or was one lead referenced to ground? This is a balanced output amp, I think, so it would make a difference in this amp. Have you done a measurement with sine waves? Have you tried the Bluetooth out points for audio in? I work on tubes only so far but really intrigued by this digital method, now that your scope showed me what is really happening in that tiny amp.
I just soldered that antenna....soo soo thank you for that tip ! I am so happy and greatfull for your instruction !!!! it works awesome ! 1.5 inch antenna !!
Great info chap. I've just done the antenna trick!!! 😳 it started out at 5 meters and is about 30 meters now!!! Awesome, thanks. One question, what does the 468 equate to? Many thanks
Thanks for the great video. I believe that you mentioned that the card has an input so would it then be possible to attach a 3.5m adapter to it in case I would prefer that? Any idea as to how much sound degradation for this BT vs. 3.5 m cable to your phone? Is the 30Watt @ 8ohm 24volt or 50Watt @ 4ohm 24volt accurate?
Bluetooth has compression, analog does not, but it all depends on how good the DAC is. Bluetooth can potentially be just as good if the integrated dac isn't great.
Hi Dave, If those test points were not available, could you have simply connected your scope to the speaker connectors? Could you show how you would use your scope to test a typical home stereo? Where you make connection points etc? Thanks for sharing and thumbs up.
Hi! I wanna ask the preset volume once you turn on the amp? Because some bluetooth amp sounds so loud once you powered on then you can only adjust the volume once connected.I want to consider buying this one if sure its not automatically in a full volume once turn on😅
Nice mod and fun little board for DIY enthusiasts. Thanks for the range information for the wire length. Can that Osciloscope measure THD, WATTS AND DECIBELS?
Most of the time you would use special audio analyzer, say Audio Precision which is specifically designed for these kind of signal analisys. You can calculate power from the Vp-p measured by the scope. For distortions, frequency response (limited by sampling) it would be possible to use something like REW, ARTA loudspeaker measuring software and voltage divider. But some amps use floating outputs, like this one, and most A/B class common ground so you have to play around and be careful not to fry something by wrong hook up.
I've read through the comments and didn't see an answer fora question I have, which is probably simply due to my ignorance. My question is can I use this to power some speakers on my ATV? From the comments it seems as though these boards require some means of regulating amperage.. Can I not simply run power to this board straight from my atv 12v battery which is fused at 10A but ofcourse I can put and online fuse in place but that wouldn't really "regulate". If I can't use this board what do you recommend? It will be mounted in a waterproof p BOSS brand 6" Tube ATV speaker. I took apart the Boss tube and it surprised me that it came with a board style amp as I expected it to be in an enclosed style. Once again that's my ignorance with this type of information. Any advice or recommendations would be greatly appreciated.
Lot of information on the board however just need your suggestion please.. I have a pair of 30W 4ohms woofer and a pair of 260W 8ohms tweeter.. Im thinking to setup a tweeter - speaker per channel with them so could use them as right and left channels.. Its setup in a single housing.. Like to know if this board be suitable for this speaker setup.. if not then like you to recommend the best amp board with bluetooth please..
hi, at 14:00 its not an input but its output as for head set or you can add another amplifier to the board, i have tried that and i foud it output, i have something to ask about, am trying to connect TPA3116D2 the normal board with Bluetooth decoder so i can use multi inputs like USB, AUX, SD CARD, Bluetooth but the main problem is the Ground loop noise, do you have aidea so i can avoid that nise? thanks,
At 18:00 the signal seems to be cropped, looks like instead of peaks there are flat lines. Does that mean that the amplifier is flattening the peaking or the mp3 chopes the waveform?
Great review! Quick question: Can you connect your smart phone to more than one of these amplifiers at the same time? The reason I ask is because I would like to convert a pair of Bose 301 speakers to Bluetooth and install these amplifiers inside the cabinets, along with a lipo battery pack and charging circuitry, switches, etc. And, I would want true stereo - which would require two of these boards. Thanks!
No they only connect to 1 board at a time. This is a stereo board, so you could put it in a speaker box and wire to the speaker internal, and the other channel to the speaker terminals. Then just connect a single wire run from one speaker to the other. That will be a future project for another bluetooth board I have. When I get another pair of speakers.
I thought that might be the case. So, it did occur to me that I could do as you suggest. I was just hoping to put together a totally wireless Bluetooth solution. Thanks, for the reply!
I don't know what speakers you use but no deep bass.The question remains which microphone is used but my impression is like this. Thanks for the presentation
Hi Dave, I bought an amplifier like this after watching your video, it's great, my question is does the ON/OFF switch stay in the ON positon when the power sauce is disconnected? or does it automatically reverse back to off, the reason i'm asking is because I would like to install a toggle switch on the outside of the cabinet to turn the amp on and off, my thoughts were to cut the cable after the transformer and connect to a toggle switch, any help appreciated. Trev
Can you please clarify if the pin out header (LGR pins) on the board are outputting the same audio as the Bluetooth? Does that mean I can connect that aux output to another amp to achieve a 2.1 setup or 4 channel setup? Is the output line level? Thanks in advance!! 😊
Hey @12voltvids - Oh Mhe GhaD! I'm only now getting baptized in/on bluetooth basics and this project/presentation is a great start; I can easily jump to "broadcasting" off my cell phone's mp3 player... may even use a mic and mixer... ;^) THANX
Textbook review! It's all there: general info, technical details, improvements and mods, running it under various conditions... excellent work! Thanks! ps: the Banggood link you provided ... do you get Banggood points when someone purchases this module? Coz I plan to buy one and it would be great if you could benefit from that too.
I have a really important question: Under the heatsink is there only one chip? Or there are two TPA3116 chips? I really need to know this to calculate something for a future project. Thanks in advance!!! Anyway, cool video!
it's use full video. i am looking to buy it. i want to know if we can connected the antina which buy in shops? can be batter the just sold wire? thanks for sharing...
jack waldenmaier orchestral what? Is that not Strauss?... That bugged me for ages finding that, I've just ordered a board though so we'll see how good the antenna mod can get inside a steel can...
Kit Rackham Yes it is a slightly different composition. Jack is a composer based out of Texas and writes music for film, television, symphony, and of course sells his production music through his web site music bakery.
Banggood also has a nice 24 volt DC 9 amp switching power supply. I noticed the maker of the bluetooth boards recommends switching power supply. The supply power has to meet the rated output power, so, I looked at a lot of supplies. One of the other youtube commenters also mentions 19 volts as the 'sweet spot' but I have yet to find a supply that comes that way; probably take the 24 volt and trim it some with the control pin.
Hello! Are your speakers powered by or powered by the amplifier board? What is the volts and amper of your source? My Bluetooth syncs but no sound comes out.
I have a few projects in mind from 1.5” speakers to 3” speakers but I’d like to find a Bluetooth board that I can use for various projects to eliminate research. Something they can push 3” speakers and ALSO be able to operate at low voltage for pushing 1.5” speakers because of the type of installation.
Greetings. I have same. I added the aerial as per your great suggestion. I have done it v succesfully with several others too. However on this am I am having issues. After a week the bluetooth is down to just an unusable 50cm. Any ideas out there please??
Is it 2tpa3116d2 with 1 tpa3116d2 per channel or it got only 1 tpa3116d2 onboard .? If it got to it can output around 100watts per channel more or less at 2 omh load..
Greetings from Brasil! Can you please tell me if you notice any "hiss"? Many of those bluetooth amplifiers have that problem, and I bought one that is similar to your amp.
@12voltvids How is it able to put out 120 watts per channel 2 channels driven so 240 watts from 24v @ 3.2 amp? I'm stuck on stupid here, I purchased 24v at 4 to 6 amps, but 240w divided by 24v = 10a if it was 100% efficient and it says 3 amps needed?
Hello please can you tell me what are the best speakers to connect to this module as I have one thanks to your review . is this module 4 ohms to 16 ohms capable?? I'm trying to connect the multi speakers to it but I don't know the specifications of what it could handle. and I cannot find any spec sheet for this module. i found out from Texas instruments that you could be from 3.2 to 8 ohms am i my correct??
It is really good to see these Bang good products demonstrated for those who don't know what to do when you get it home. Please suggest a suitable enclosure to put this in. Would have liked to have seen you add another electronics kit to this to add a mic input. many thanks. Ps how are the cats?
There are plenty of plastic boxes that are suitable for this. I don't have any off hand, but will keep my eyes open for one to mount it in. Must be plastic though. Metal will shield the antenna.
Banggood has been sending me stuff to demonstrate, and as long as they continue to send me gadgets I will show them off and put them through their paces. It is fun work, and I made a few $ off the advertising revenue. As to an enclosure, I think I am going to build it into a set of speakers! Stay tuned!
Don't understand how there are four month old questions unanswered and videos put out since, in fact 4 days ago. Believe me I understand how busy life gets and maybe this isn't your only job and you have other responsibilities, and you're not the only one that does this, but the last two questions are really good questions and would determine if I would purchase this amplifier or not. I promise I'm not being a complete butthole but you stated that banggood sent you this parade review oh, I'm sure it was they would like to see the questions answered as well as the rest of us. Honestly this is probably one of the best videos only amplifier boards that I have ever seen! But this is like getting an awesome product and no service afterwards. Unfortunately you can't answer every question in your 20 to 30 minutes of testing and I'm sure you won't be able to keep coming and watching the video after the first week and they have. Comments from subscribers and non-subscribers are what are part of the logarithm but also the interaction of you commenting back and answering the questions! It would be to everybody's benefit if you and other TH-camrs would keep the interaction going by actually answering the questions that you generate with this video and others. I'm sorry but I do think my actions are Justified because I had several questions and I don't even know if this is going to be seen. Should I subscribe knowing that my questions may not be seen or answered in a week after or even at all? Would you subscribe to my Channel or any other channel that is an information-based format where the owner doesn't interact with their subscribers? If you start doing this and answering these people's questions, I'll gladly stay subscribed and refer others as I have a few friends in the car audio and audio world. I know you may not need our subscriptions but honestly I don't know how you wouldn't. I will delete this if I can get a straight answer back. Thank you and once again a amazing video!
I try to respond to every question I see. However I have almost 1400 videos on my channel now. Not every question I get a notification of. I only respond to questions I know exist and that is when I receive an email notification from youtube. If I don't get an email to tell me there is a question to a specific video then I don't know there is a video there, and again, I have 1400 videos up, and can't possibly look through every video every day and see if there are new comments. I have brought this to youtubes attention in the past, but nothing has changed. Many of my subscribers are also patreon members and ask me questions though my patreon channel or send me an email directly from my email link. Those ones I do get and respond to. I am still answering questions to videos that were posted 5 years ago, when I get the question. Also be aware that this is not a full time job for me. I do work full time and then some, putting in an average of 9 hours a day at my day job, and do not check my email, or youtube channel during work hours. If you knew the hours that I am policing the channel you would understand how much work it is just dealing with the crap that everyone that has a channel has to deal with. Also, if a question gets posted that someone puts a URL in or a link, youtube automatically flags that as spam or potentially inapproiete message and I never see those unless I go into that junk folder and check. So some legit comments are sitting in limbo because the poster included a link or URL in the message and youtube quarantined it. This is done to stop malware. If it was a public message and someone clicked on a malware link then their system could be compromised.
Maybe I missed this in the comments or in the video, but is there a standalone power module that you would recommend with this thing? I'm still wondering how you would get 200 W with only 3 amps at 19v?
Where did you get 200 watts? It is rated 100, and not at 19 volts. Here is the specs on the chip. Supports Multiple Output Configurations 2 × 50 W Into a 4-Ω BTL Load at 21 V (TPA3116D2) 2 × 30 W Into a 8-Ω BTL Load at 24 V (TPA3118D2) 2 × 15 W Into a 8-Ω BTL Load at 15 V (TPA3130D2) Wide Voltage Range: 4.5 V to 26 V So at 26 volts, into 4 ohms it can do 50+ WPC. The supplier claims 120 total or 60 per channel.
Hi, i really like your'e video and I learn a lot, but i have a little question, it is possible conect a signal to the board without the bluetooth reciever?, this is because I keep in mind build a guitar amplifier 200 Watts, and i need connect a guitar signal to amplify. Hope You can help me.
Overrating board manufacturer. The TPA3116 can sometimes do a bit more than 50x2 @ 24v and 4 ohms, but not 20 watts more. I guess Chinese find underrated specs blasphemous and must correct such dissent by doing things like that.
I really like your video. It sounds like I can hook this up to large home speakers? Am I correct? I looked for a way I could contact you directly. This seems to be the only way? Thank you for your help, Keith
Hello, can you please advice me with buying a similar amp, please? I need something for a ~50W, 3 way, old Sony, 6ohm speaker. I want to make it wireless, portable. What do you recommend ? This module or maybe ,meanwhile, you tested something else, better than this? Thank you so much ! Chris
From what I've read, the sweet spot for the TPA3116 is right around 19 volts. If you provide some 4700 uF caps in the supply, you may also get better sound. I hope you make a video when you hook it up to your main speakers. It would also be interesting to see how much difference there is between Bluetooth and line-in.
BlankBrain same amplifier I'm connect 12volt 3a supply and load 15watt each channel but sound not working in speaker it's any falt other wise
Can improve my voltage and amperes ?
After trying three TPA3116D2 based amplifiers I ran into the same conclusions as "BlankBrain's" I operated the amps off 19 Volt 4.7A Dell laptop PSU's with 4700uf filter caps, Alternatively used wired and BT input sources. Sound great. FYI! on public domain sites there are 3D printing plans for cases that fit some of those Bluetooth TPA3116 amps. I tested with Definitive Technology surplus bass drivers and had to apologize to the neighbors. They claimed their dogs filed for relocation.
@@avrahamchamish521 I concur as well. If you want a really well made laptop supply then the best I have come across are the Toshiba ones. Beautifully made and properly screened. I have a few Dell supplies here but haven't tried them - not least because they are attached to laptops and might be missed. Also they don't have the standard barrel connector. But they should be decently made too, but the Toshiba ones are exquisite. I was really surprised how much went into them.
I've built two ammo-box bluetooth speakers using coaxial speakers made for cars, works really well. I'm powering them by a 7,2Ah AGM battery and mounted a charger inside the box with a "cicle of eight" connector for 110/200V on the outside. Also mounted a small LDC panel showing remaining battery. Since the steel box acts a bit like a Faraday cage, I had to solder a tine coaxial cable to where the base of the surface mounted antenna on the board were, scrape off the rail, thus deactivating the original antenna. The cable I soldered I then connected to a Wifi connector that I mounted on the box and then a Wifi antenna on the outside (Both bluetooth and Wifi uses 2,4Ghz so it's perfect). Works quite well and has both good range and power, even though I could only mount one battery in the box because of limited space, two batteries giving 24V would be better.
Your 1/4 wavelength at 2.4Ghz used commonly is 31.25mm which is 1.23", not 1.5" And considering BT is 2.45Ghz, that length is closer to 1.20". Trim your wire a bit and you may increase your range slightly. Best to cut that PCB squiggle and attach there a short run of coax center and ground that should be available and run that to an antenna that is a minimum of 1/4 wavelength away from the dome-peak of the electronics to reduce the floor interference. Thanks for the video, by the way.
Excellent analysis, made my day
I am building a 5.1 system and isolating woofer completely paired with it's own amp, this helped me decide on what configuration to use as I am using 12V to make it portable as well with a Li-po battery pack. So in theory I should still be getting ~50/~50 L/R with ~50W 2.1 channel or 2x(50W+50W) + 2x(~50W) making part of the system portable while keeping overall performance good enough.
Thanks for the update, I just purchased one off Amazon. My wife wants an expensive surround sound to play movies off her phone. I have about 5 older speakers from an old surround sound system. Badda'Bing'Badda' Boom. I hope I can get this going for 19.99. Lol
After watching this video a second time i ordered the TPA3116D2 form Bang good. It also comes with an acrylic case
thanks for sharing. antenna trick and line-in still of great value. had this thing for a year and only using it now. this amp is loud for its size!
What song is that in the middle??? It's so good!
These boards are great for dead bookshelf systems, saving the speakers from scrap. I have to try the 1.5 inch antenna mod.
Yup. I just gutted out my klipsch promedia 2.1 speakers and am replacing it’s amp with this amp.
May i ask what speakers you are powering? :D
Hi , You mean Audio Ode? like Alternative Audio output? Hope to answer this question because i have this board also and i want to add more mini amplifier to this board
I can't believe the difference that 1 1/2" wire made. I figured it would get slightly better but not as good as it did. Your neighbor was looking at you like, "what the heck is Dave doing now?"
Great info. Thanks for talking about this being a balanced output. I wasn't aware that I couldn't use a common ground. I bought a new speaker that likely has switches and such. I didn't know they bridged negative wires together which would cause amplifier failure. Thanks.
I bought one per your recommendation! I mounted it on back of some Bose bookshelf speakers I was not using that I got off ebay! Got it paired with my chrome book it sounds and works great very pleased. Thanks!!
It has any analog input ??
I have a tda 7498 version, however it is very bright and have low bass. sounds very raw.
I'm kind of new to electronics, am I missing something?
120 watts per Channel???
12 V. Power supply.... is that thing pulling 10 amps?
Or at 24 volts pulling 5 amps?
I know the thing has inductors but, if the amperage isn't there it's not there! So where does the wattage come from?
One more question?
12 volts X 10 amps =120watts. So that accounts for one channel 120 watts.
You said something about the inductor alternating?
Does that mean the 120 watts is alternating from left to right channels, using the inductor/s?
Thanks Dave. it's an honest question I'm not being a jerk!
The way they calculate this is into a 4 ohm load. This power is also rated at the full working voltage of 24 or 26 volts not 12. Look up the specs of the chip. Also it is a BTL output. Each leg should be able to put out 50 watts. Remember that the speaker terminals are driven out of phase with each other so one side goes + while the other - and then they flip. Class D are very efficient so all the way of thinking and calculating power used on linear amplifiers goes out the window. These are pwm amplifiers and efficiencies are gained through those inductors.
@@12voltvids okay, thank you! I appreciate all that information!
I really love the way you explain everything... Thank you
The short 1-1/2" wire worked good to increase the range. Normally Bluetooth range is usually around 20 to 30 feet.
Yes 30 feet is suposed to be maximum. That would be from the front door of the garage to the street, as I am set back 30 feet. The receiver was at the back of the garage, a good 40 feet from the road, and I crossed the road with it, so yes it dis make a huge improvement.
I have the 150w x 2 non Bluetooth, great board! 24v
24v how much amp dose it matter more better
My own tests on this unit are as follows: Needs the antenna mod shown in this video but that makes the Bluetooth work great. Very easy mod to do, see this excellent video. Comparing it to a SE EL84 tube amp, both capable of low volume good involving sound without fatigue or need to turn it up. This digital amp on a 24 volt 2.7 amp laptop power supply begins to clip symmetrically at 2 volts RMS with 8 ohm load, odd harmonics, so 1/2 watt per channel. Very similar power to my SE tube amp. Frequency response flat 60 - 18,000 HZ. Mild roll off at 40HZ, more at 20HZ, but still some signal there. The SE tube with much more low end slam than this despite equivalent watts. My speakers only go down to 50 HZ so bass is not what I am after. Will actually use this amp, I think, as it is very good sounding at low volume for near field listening. Convenient Bluetooth implementation. I think it sounds just a little better on 19 volts than 24.
I just love these credit card sized BT Amps. If you ask me, this video could have easily doubled in time and I'd be happy, but still a great video. I have one that uses the tracks from the PCB and they set the BT module on the PCB and used the tracks on the board as a antenna, they did use liquid tin not solder and that allows me to go all over the house and outside and I have real aluminum siding.
Hands up for this review..
thank you sir for this video 👍🙌...
it is helping me.. because im going to purchase this Bluetooth amplifier...
you are a specialist...
keep on sharing....
and thank yoy 😊...
this board is great!! powering it with a 4s lipo and it has bunch of power at 8 ohms. starts to distort easily at 15 volts, i will add a voltage booster and set it to 25v
That antenna was ingenious 😀
Thanks for the review!
The one thing that I don't readily find on these boards ( Amazon and so on ) is if they have that annoying "Blue Tooth Audio" voice.
Maybe I missed it, but is there an on-off switch?
Does it pop when you turn it on or off?
And how do you think the Bluetooth performance will be once it's maybe mounted inside of an enclosure?
yes good amp but how do you get it from popping and crackling
THANK'S A LOT FOR SUCH A GREAT VIDEO! i appreciate the knowledge of a senior electronics expert as you. greetings from colombia.
Hi there I've just bought one of these in the UK after seeing your video. 👍. Was wondering though if I used just a 12v power supply would the output wattage power still be 120w per channel or would it be less. Cheers John
Hi mate. I'm in the UK. Where did you buy from? Link pls. Thanks.
It would be less. Supply voltage determines the p-p swing of the speaker voltage. 24v will allow for 24v p-p voltage swings per output rail. 12v would cut the output voltage in half so half power everything else being equal.
@@12voltvids Thank you for your reply. And give the bluetooth trick a try. Cheers John
@@SahinurUK Hi I got mine from Ebay just search for Bluetooth amplifier board, or Amazon has also. Cheers John
RMS power is .707 peak. I did ohms law, on 24 volts, and an 8 ohm load...would be 72 watts (flooded) and .707 that is 50.9 watts rms max per board. So I'm thinkin' 120 watts per channel, is peak to peak rating. A lot of audio companies list this rating, and I grew up on classic electronics, so ohms law and i squared r always comes to mind for power.
Well, almost. The 24V is DC so that is + or - 12V peak. 0.707 of that is 8.something Volts, giving 9W. So how do they get to 50W or even 120W? Well, it's actually rated for a peak of about 26V DC, if I remember correctly, but the main thing is that each channel here is bridged, giving you twice the voltage range, and so 4x the power. But that's still only 36W and we still haven't taken into account the dropout voltage. So they spec it into 4 ohms to double the power, and 50W is then, possibly, a reasonable spec.
For 120W they put both channels in parallel and they spec it into 2 ohms. You need a 2 ohm speaker to achieve it, of course. At all these high levels you are really thrashing the amplifier (and it would have been nice to see him put some sine waves on a scope driving various load resistors to see if it can really manage it). In fact, on the scope topic, it would have been nice if he had the slightest clue about what he was doing, or how these things worked. I have run a couple of these off a standard 19.xV laptop supply and that's probably a comfortable supply level to give it. It's likely to last longer than going to the full 26+V.
Nice video sir, How is the bass response.
Hello! Could you tell me where I can find the music you used for testing here? It sounds great! Thx in advance!
Hi , great review...i have the board also and you mention that the out put where you solder the ground on, also an input can be.....did you try that out?...i like to hook this up to my broken active loudspeakers but i want no latency, for music playing purpose ..thanks in advance Jody
I'm making a set of two speakers and building in one of BangGood houses Sanwu Bluetooth and amp boards. The one I chose has remote control over infrared.
Really excellent video! For the audio waveform demo at 28:40 you point out 24 volts on scope. Were your leads across the speaker out terminals, and measuring entire balanced output voltage, or was one lead referenced to ground? This is a balanced output amp, I think, so it would make a difference in this amp. Have you done a measurement with sine waves? Have you tried the Bluetooth out points for audio in? I work on tubes only so far but really intrigued by this digital method, now that your scope showed me what is really happening in that tiny amp.
I just soldered that antenna....soo soo thank you for that tip ! I am so happy and greatfull for your instruction !!!! it works awesome ! 1.5 inch antenna !!
3 inch antenna works slightly better, but not worth the extra amount of dangling wire.
Great info chap. I've just done the antenna trick!!! 😳 it started out at 5 meters and is about 30 meters now!!! Awesome, thanks.
One question, what does the 468 equate to?
Many thanks
Where did you solder the antenna at?
@@raulsd.i.y.videos5585 on the board antenna.
Great video. Is there away to reduce the start up sound. Mine seems to go at full volume which is way to loud.
Same here, need a fix for this.
So your neighbour would often see you hold a phone walking around randomly in front of the yard with the loud music playing~ LOL
Loved the review but what watch are you wearing i love it!
Thanks for the great video. I believe that you mentioned that the card has an input so would it then be possible to attach a 3.5m adapter to it in case I would prefer that? Any idea as to how much sound degradation for this BT vs. 3.5 m cable to your phone? Is the 30Watt @ 8ohm 24volt or 50Watt @ 4ohm 24volt accurate?
Bluetooth has compression, analog does not, but it all depends on how good the DAC is. Bluetooth can potentially be just as good if the integrated dac isn't great.
I'm searching for the comment for analog input can I connect analog input ?? Or solder the wire or something? ?
Hi Dave,
If those test points were not available, could you have simply connected your scope to the speaker connectors? Could you show how you would use your scope to test a typical home stereo? Where you make connection points etc? Thanks for sharing and thumbs up.
Hi! I wanna ask the preset volume once you turn on the amp? Because some bluetooth amp sounds so loud once you powered on then you can only adjust the volume once connected.I want to consider buying this one if sure its not automatically in a full volume once turn on😅
Thanks for actually using a spectrum analyzer to do the review. There really isn't enough empirical data in reviews on here.
Nice mod and fun little board for DIY enthusiasts. Thanks for the range information for the wire length. Can that Osciloscope measure THD, WATTS AND DECIBELS?
Most of the time you would use special audio analyzer, say Audio Precision which is specifically designed for these kind of signal analisys. You can calculate power from the Vp-p measured by the scope. For distortions, frequency response (limited by sampling) it would be possible to use something like REW, ARTA loudspeaker measuring software and voltage divider. But some amps use floating outputs, like this one, and most A/B class common ground so you have to play around and be careful not to fry something by wrong hook up.
I've read through the comments and didn't see an answer fora question I have, which is probably simply due to my ignorance. My question is can I use this to power some speakers on my ATV? From the comments it seems as though these boards require some means of regulating amperage.. Can I not simply run power to this board straight from my atv 12v battery which is fused at 10A but ofcourse I can put and online fuse in place but that wouldn't really "regulate". If I can't use this board what do you recommend? It will be mounted in a waterproof p BOSS brand 6" Tube ATV speaker. I took apart the Boss tube and it surprised me that it came with a board style amp as I expected it to be in an enclosed style. Once again that's my ignorance with this type of information. Any advice or recommendations would be greatly appreciated.
Lot of information on the board however just need your suggestion please..
I have a pair of 30W 4ohms woofer and a pair of 260W 8ohms tweeter.. Im thinking to setup a tweeter - speaker per channel with them so could use them as right and left channels.. Its setup in a single housing.. Like to know if this board be suitable for this speaker setup.. if not then like you to recommend the best amp board with bluetooth please..
Tell me the price of this board.. & how much watt of speakers is being played by you?
hi,
at 14:00 its not an input but its output as for head set or you can add another amplifier to the board, i have tried that and i foud it output, i have something to ask about, am trying to connect TPA3116D2 the normal board with Bluetooth decoder so i can use multi inputs like USB, AUX, SD CARD, Bluetooth but the main problem is the Ground loop noise, do you have aidea so i can avoid that nise?
thanks,
Sir, what about noise? i brought from amazon after your review but getting little harsh... noise when pause playing
The best review ever seen on TH-cam of a $15USD device. How do you get 240 watts out of 3 amp?
Exactly! I just asked the same question? I'm new to electronics but 12 volts 3 amps = 36 Watts tops!
At 18:00 the signal seems to be cropped, looks like instead of peaks there are flat lines. Does that mean that the amplifier is flattening the peaking or the mp3 chopes the waveform?
Great review!
Quick question: Can you connect your smart phone to more than one of these amplifiers at the same time?
The reason I ask is because I would like to convert a pair of Bose 301 speakers to Bluetooth and install these amplifiers inside the cabinets, along with a lipo battery pack and charging circuitry, switches, etc. And, I would want true stereo - which would require two of these boards.
Thanks!
No they only connect to 1 board at a time. This is a stereo board, so you could put it in a speaker box and wire to the speaker internal, and the other channel to the speaker terminals. Then just connect a single wire run from one speaker to the other. That will be a future project for another bluetooth board I have. When I get another pair of speakers.
I thought that might be the case. So, it did occur to me that I could do as you suggest. I was just hoping to put together a totally wireless Bluetooth solution. Thanks, for the reply!
Thanks for the video. Been looking for an amp for the set of speakers I'm building and I'm going to order one of these. Great video!!!
I don't know what speakers you use but no deep bass.The question remains which microphone is used but my impression is like this. Thanks for the presentation
Deep bass? It's an amplifier, so you don't want it to colour the bass.
Hi there good video thinking of getting one but the first question is what I would like to know, dose it have the annoying Chinese voice?
Cheers.
Hi Dave, I bought an amplifier like this after watching your video, it's great, my question is does the ON/OFF switch stay in the ON positon when the power sauce is disconnected? or does it automatically reverse back to off, the reason i'm asking is because I would like to install a toggle switch on the outside of the cabinet to turn the amp on and off, my thoughts were to cut the cable after the transformer and connect to a toggle switch, any help appreciated. Trev
Can those buttons for skip/volume up, play/pause functions be reprogrammed using Arduino or Raspberry pi?
Love your attitude, old guys rule!
One more thing, on iPhone 6s six “boxes” of volume is the highest volume you should go to stay under clipping, just under 1/2 volume.
Can you please clarify if the pin out header (LGR pins) on the board are outputting the same audio as the Bluetooth? Does that mean I can connect that aux output to another amp to achieve a 2.1 setup or 4 channel setup? Is the output line level? Thanks in advance!! 😊
Hey @12voltvids - Oh Mhe GhaD! I'm only now getting baptized in/on bluetooth basics and this project/presentation is a great start; I can easily jump to "broadcasting" off my cell phone's mp3 player... may even use a mic and mixer... ;^) THANX
it's an aux output, so how can i hook it to other Amplifier
Very good sr which speake how much watt use?
Nice Video Thanks.
What speakers would you recommend?
Andy The Truth
Anything that you like will work fine. I run mine on a pair of polk bookshelf speakers and it sounds great.
Textbook review! It's all there: general info, technical details, improvements and mods, running it under various conditions... excellent work! Thanks!
ps: the Banggood link you provided ... do you get Banggood points when someone purchases this module? Coz I plan to buy one and it would be great if you could benefit from that too.
That is the link they gave me, but I don't know if I get points for a sale from that link or not.
Done! Purchased it right now via that link. Let's hope Banggood throws some points your way. Have a nice one!
klcbsoft banggood gives points to all who buy
We can use this board to replace harman kardon go plus play mini board? Does this ok for harman's tiny 3.5 inches speakers?
I have a really important question: Under the heatsink is there only one chip? Or there are two TPA3116 chips? I really need to know this to calculate something for a future project. Thanks in advance!!! Anyway, cool video!
I didn't pull the heatsink, but I imagine there is only 1 chip.
I have two 150 watt stereo speakers that would work great with this little amp.
Great test! Excellent explanations!
$13.50 on Ebay including shipping. It is a great little amp for the price.
OMG A Blackberry! /shock
it's use full video. i am looking to buy it. i want to know if we can connected the antina which buy in shops? can be batter the just sold wire? thanks for sharing...
jack waldenmaier orchestral what? Is that not Strauss?... That bugged me for ages finding that, I've just ordered a board though so we'll see how good the antenna mod can get inside a steel can...
Kit Rackham
Yes it is a slightly different composition. Jack is a composer based out of Texas and writes music for film, television, symphony, and of course sells his production music through his web site music bakery.
Banggood also has a nice 24 volt DC 9 amp switching power supply. I noticed the maker of the bluetooth boards recommends switching power supply. The supply power has to meet the rated output power, so, I looked at a lot of supplies. One of the other youtube commenters also mentions 19 volts as the 'sweet spot' but I have yet to find a supply that comes that way; probably take the 24 volt and trim it some with the control pin.
just buy any laptop charger(power supply) this is cheapest option and best. just buy orginal used one, not aftermarket one
Hello! Are your speakers powered by or powered by the amplifier board? What is the volts and amper of your source? My Bluetooth syncs but no sound comes out.
What’s the minimal power requirement to power two 1.5” speakers at 10-20watts each? I’m trying to build a portable lipo powered unit.
I have a few projects in mind from 1.5” speakers to 3” speakers but I’d like to find a Bluetooth board that I can use for various projects to eliminate research. Something they can push 3” speakers and ALSO be able to operate at low voltage for pushing 1.5” speakers because of the type of installation.
Greetings. I have same. I added the aerial as per your great suggestion. I have done it v succesfully with several others too. However on this am I am having issues. After a week the bluetooth is down to just an unusable 50cm. Any ideas out there please??
press the reset button ;)
@@geosplayground663 thanks fir this
@@FynbosGarden sold coil on Bluetooth to increase distance of it . not thin and not too much thick
its help a lot, thanks for the review, i have one of that
Me i dont have
Is it 2tpa3116d2 with 1 tpa3116d2 per channel or it got only 1 tpa3116d2 onboard .? If it got to it can output around 100watts per channel more or less at 2 omh load..
Greetings from Brasil! Can you please tell me if you notice any "hiss"? Many of those bluetooth amplifiers have that problem, and I bought one that is similar to your amp.
V3.1 of the board has the ground foil removed on the back side of the antenna. I'm not sure it makes any difference.
@12voltvids How is it able to put out 120 watts per channel 2 channels driven so 240 watts from 24v @ 3.2 amp? I'm stuck on stupid here, I purchased 24v at 4 to 6 amps, but 240w divided by 24v = 10a if it was 100% efficient and it says 3 amps needed?
Hello please can you tell me what are the best speakers to connect to this module as I have one thanks to your review . is this module 4 ohms to 16 ohms capable?? I'm trying to connect the multi speakers to it but I don't know the specifications of what it could handle. and I cannot find any spec sheet for this module. i found out from Texas instruments that you could be from 3.2 to 8 ohms am i my correct??
It is really good to see these Bang good products demonstrated for those who don't know what to do when you get it home. Please suggest a suitable enclosure to put this in. Would have liked to have seen you add another electronics kit to this to add a mic input. many thanks. Ps how are the cats?
There are plenty of plastic boxes that are suitable for this. I don't have any off hand, but will keep my eyes open for one to mount it in.
Must be plastic though. Metal will shield the antenna.
Banggood has been sending me stuff to demonstrate, and as long as they continue to send me gadgets I will show them off and put them through their paces. It is fun work, and I made a few $ off the advertising revenue.
As to an enclosure, I think I am going to build it into a set of speakers! Stay tuned!
Don't understand how there are four month old questions unanswered and videos put out since, in fact 4 days ago.
Believe me I understand how busy life gets and maybe this isn't your only job and you have other responsibilities, and you're not the only one that does this, but the last two questions are really good questions and would determine if I would purchase this amplifier or not. I promise I'm not being a complete butthole but you stated that banggood sent you this parade review oh, I'm sure it was they would like to see the questions answered as well as the rest of us.
Honestly this is probably one of the best videos only amplifier boards that I have ever seen! But this is like getting an awesome product and no service afterwards. Unfortunately you can't answer every question in your 20 to 30 minutes of testing and I'm sure you won't be able to keep coming and watching the video after the first week and they have. Comments from subscribers and non-subscribers are what are part of the logarithm but also the interaction of you commenting back and answering the questions! It would be to everybody's benefit if you and other TH-camrs would keep the interaction going by actually answering the questions that you generate with this video and others. I'm sorry but I do think my actions are Justified because I had several questions and I don't even know if this is going to be seen.
Should I subscribe knowing that my questions may not be seen or answered in a week after or even at all?
Would you subscribe to my Channel or any other channel that is an information-based format where the owner doesn't interact with their subscribers?
If you start doing this and answering these people's questions, I'll gladly stay subscribed and refer others as I have a few friends in the car audio and audio world. I know you may not need our subscriptions but honestly I don't know how you wouldn't. I will delete this if I can get a straight answer back. Thank you and once again a amazing video!
I try to respond to every question I see. However I have almost 1400 videos on my channel now. Not every question I get a notification of. I only respond to questions I know exist and that is when I receive an email notification from youtube.
If I don't get an email to tell me there is a question to a specific video then I don't know there is a video there, and again, I have 1400 videos up, and can't possibly look through every video every day and see if there are new comments. I have brought this to youtubes attention in the past, but nothing has changed.
Many of my subscribers are also patreon members and ask me questions though my patreon channel or send me an email directly from my email link. Those ones I do get and respond to. I am still answering questions to videos that were posted 5 years ago, when I get the question. Also be aware that this is not a full time job for me. I do work full time and then some, putting in an average of 9 hours a day at my day job, and do not check my email, or youtube channel during work hours.
If you knew the hours that I am policing the channel you would understand how much work it is just dealing with the crap that everyone that has a channel has to deal with. Also, if a question gets posted that someone puts a URL in or a link, youtube automatically flags that as spam or potentially inapproiete message and I never see those unless I go into that junk folder and check. So some legit comments are sitting in limbo because the poster included a link or URL in the message and youtube quarantined it. This is done to stop malware. If it was a public message and someone clicked on a malware link then their system could be compromised.
Maybe I missed this in the comments or in the video, but is there a standalone power module that you would recommend with this thing? I'm still wondering how you would get 200 W with only 3 amps at 19v?
Where did you get 200 watts? It is rated 100, and not at 19 volts.
Here is the specs on the chip.
Supports Multiple Output Configurations
2 × 50 W Into a 4-Ω BTL Load at 21 V (TPA3116D2)
2 × 30 W Into a 8-Ω BTL Load at 24 V (TPA3118D2)
2 × 15 W Into a 8-Ω BTL Load at 15 V (TPA3130D2)
Wide Voltage Range: 4.5 V to 26 V
So at 26 volts, into 4 ohms it can do 50+ WPC. The supplier claims 120 total or 60 per channel.
Hi, i really like your'e video and I learn a lot, but i have a little question, it is possible conect a signal to the board without the bluetooth reciever?, this is because I keep in mind build a guitar amplifier 200 Watts, and i need connect a guitar signal to amplify. Hope You can help me.
Do you think you could use this board in an old car stereo body? Turning a classic car radio body into an in car Bluetooth speaker?
Thanks for your time
Can a stereo input cable be connected by soldering it?
Hi there, could you tell me if you have fixed the high bluetooth start up sound somehow? Could I change a resistor? Which one?
I have the same kit. But sound quality is not good. Can you suggest how to fix this?
Nice video like always Dave! What do a search after to find that orchestra soundtrack that is a masterpiece?
for the 2x ch 3116d2 can i use a 19.5v 12amp power supply to get 234w divided by 4ohm load to get about 58w out of each channel?
Is there a way to reset these boards. Mine rarely connects via Bluetooth or aux
Thanks a lot! I believe you use 1/4 wavelength ant, which length is 30/2.4/4/2.54=1.23"
Hi
I need 100w RMS for my car subwoofer.
Wiche board you recommend
The TPA3116 is a 100 watt chip and this has 2 so 200w, where does it get the extra 20w per channel extra, a total of 40 watts for 240watt?
Overrating board manufacturer. The TPA3116 can sometimes do a bit more than 50x2 @ 24v and 4 ohms, but not 20 watts more. I guess Chinese find underrated specs blasphemous and must correct such dissent by doing things like that.
power rms? Pms=1/2 x V^2/R, that aint going to get near 125watt @ 4ohms, calc 72watts on 4ohms
I really like your video. It sounds like I can hook this up to large home speakers? Am I correct? I looked for a way I could contact you directly. This seems to be the only way? Thank you for your help, Keith
Yes you an connect to large speakers. I have it on a set of Polk bookshelf and they sound great.
Hello, can you please advice me with buying a similar amp, please? I need something for a ~50W, 3 way, old Sony, 6ohm speaker.
I want to make it wireless, portable.
What do you recommend ? This module or maybe ,meanwhile, you tested something else, better than this?
Thank you so much !
Chris
For 99usd a pair, the Klipsch R-14m would blow the doors off your garage in testing ;) sub'd