I believe that wire on the aux cable that you removed is a ground. I had the same problem with this board and the seller said the fix was to tie this wire to the ground (one of the screw holes in the upper right corner). Seems like a common problem as I got this feedback very quickly from them.
Grounding the wire turns bluetooth on on my KAB-215 board. So, what I've found is that BT -> R(in) is not even necessary. You can switch on BT module via BT -> GND.
4 wires for a stereo aux input seems odd to me. The only time I can think of that would need 4 wires would be, if you're including a microphone input. or some charging capability through the aux, which to me sounds like a stretch.. either way, it makes sense that the feedback would come from the 4th wire as I would consider that a bad ground. .remove the bad ground and remove the ground loop feedback.
Something people should be aware of with these amps. The watts ratings are bogus. Whatever SURE (or any manufacturer) rates these, the usable output is actually around half. Just take a look at the spec sheets. They are rated 10% THD at full output and will sound like garbage on any set of speakers. However, they are generally 0.1% or less THD at around half the rated output. Also, the published ratings are at 4 ohms. Most home audio is 8 ohms. So really, if you have a 50 watt amp, for 8 ohm speakers, usable watts are 12.5. And because of all the marketing BS over the years, most folks don't realize 12 watts is cranking on good speakers.
You don't need a true 100W per channel. Very few speakers could actually take 100W. Unless you have huge speakers, with multiple woofers, multiple midrange drivers and a tweeter, an amp like this rated at 50-100wpc will be more than enough to drive your speakers beyond their rated wattage.
I totally agree with you on the power and how much it's changed over the 20 years. The power ratings that is. I installed car audio for about 5 years in the mid-90s. We never used more than 150 to maybe 250 watts per subwoofer. Now I do know that the Rockford Fosgate amps that we used worth heavily underrated say for instance the punch 60 was supposedly 30 x 2 Watts at 4 Ohms. Testing last year showed that this amp actually put out around 80 x 2 at 4 Ohms! We all knew something must be going on but of course you didn't have the internet back then and the amp was also around $300 so strangely we had to throw the spec sheet out the window lol. But still, we did not run the Thousand watts per sub that people are doing now and not making that much more volume or SPL. And this is not only with subwoofers but front stage drivers as well. And amplifiers and speakers have become more efficient so why do we need 100 Watts for each 6.5 inch coaxial in each door? LOL we don't! So yes 12.5 clean repeat clean, watts, is very adequate. Still, even today, they still will not get away from putting those large Peak or Max wattage numbers on the box and marketing materials. Don't even get me started on power wiring and additional batteries! Again, class D amplifiers have become almost 50% more efficient than the older a b amplifiers but now all of a sudden we need 4 gauge and sometimes 0 gauge runs of expensive wiring or even welding cable! I took out my older Rockford Fosgate Punch 200 DSM amplifier which is capable of making 400 plus watts and does so easily on a gauge cable that can be up to 20 ft long! Thank you for bearing with me I know it's car audio but still it's audio and it's wattage! I appreciate everyone.
Hello all, my kit arrived today and I haven't been able to replicate the feedback noise from the audio jack as shown here by Kirby. The only difference that I can see is that I used the full width cable supplied with the daughter board (input and usb).Maybe a V2.0 daughter board. Sounds good though. Box building this weekend.
To avoid confusion, class d amps are not digital, the "d" does not stand for digital and its only similarity is that it uses switching transistors. The bluetooth/usb modules are the only digital parts.
True, the D does not stand for digital, but the "digital" refers to the digital control of the switching transistors. You can find more info here: www.audioholics.com/audio-amplifier/the-truth-about-digital-class-d-amplifiers Thanks for your input and for watching!
It's still not digital. Although the switching transistors are used in saturation, i.e. fully on or off, akin to how they are used in digital equipment, the timing of them turning on or off is not time-discrete like it would be for example in a digital direct delta-sigma amplifier, but analogue.
It's not digital unless it's discrete in all dimensions :( Sorry to disappoint and i know it's nitpicking because it really doesn't terribly matter, but it's true.
I think your speaker builds are impressive. Would love to see how you would approach a build using a chromecast audio (with optical output) instead of bluetooth.
I got one the JAB 2 50x2 boards with all the the extension boards from China 4 months ago, and have never experienced any noise with mine. Its been working great, you may have got a faulty unit. I agree with you these are the nicest little amps to come out so far. Did you know you can add a couple more battery boards to get longer run time? It still stays at 12 volt from what i understand. I like the videos, keep em coming!
I actually ordered four boards from Parts Express and all of them had this problem. I also talked with he customer service there and they said all their boards are experiencing this. I'm thinking they might have received a bad run from Sure, but that would probably still be hundreds, if not thousands, of boards with this potential issue. Such a bummer! I'm super glad it's a pretty easy fix though. I hadn't tested chaining the battery boards yet, but I suspected that was possible with the multiple connectors not he back of the board. Pretty rad! Thanks for watching and chiming in!
I just figured it out, re read the specs, I'm using the AA-JA11112 Interface Extension Board and it comes with a ground loop isolator built in, so that could be why I haven't experienced any noise issues.
Were you talking about the background hissing or the light "feedback" because a lot of cheap bluetooth speakers have that hissing and if eliminating a wire from bluetooth to aux switching is the solution, I'm off to test this!
No worries, love your chanel, given me some great insight to building speakers, will be purchasing some plans shortly, just wish there were plans for the Nirvana ha ha
Hey Kirby, do you still feel this is the best bluetooth amp board? If not which would you now recommend? I like the fact that you care what the speaker looks like when its finished and not just throwing random things together and calling it a "speaker".
I have used several of the JAB1 series amplifiers w/battery charger. I have never had the feedback that you experienced. I will definitely keep a look out for any issues. Also be aware the speaker outputs on the JAB1 are labeled incorrectly and puts the speakers out of phase. I really wish the speaker wires were not all black and 20ga wire instead of 22ga. I make custom molex connectors with upgraded wires gauges for the speakers, power input (upgrade to 20ga) and the charge cable (upgrade to 22 ga). Great video series Kirby!
I used it in a bluetooth speacker DIY with 6" speacker and it's work very well, the only trouble was the battery, the size are not perfect for 18650 lithium battery but if you push very very hard you can put in it. Also 12v are not enough for delivering the max volume, but it's satisfying for outdoor. Very clean amplifier with great sound, not bassy like bt speacker as bose ect... I can't wait to see what you will make with this board
Im planning on building an ammo can Speaker with all the components you mentioned in the video. I want good bass as well as treble. What speakers would you suggest?? Should I get a woofer + tweeters?? Or full range speakers ??
Great Video! Can you Tell me how to wire this board for a mono speaker? The build plans assume the optional second speaker but I really want to just have a single speaker running mono? I can't find any documentation on how to wire this that is consistent.
I plan on doing a DIY copy of the Sony SRS X-77. DOSS Audio recently made a budget version with some decent tuning but the enclosure had serious resonance issues. What can be done today for a 2.1 build with BT? My design will have isolated mains and a subwoofer with a passive radiator. I've been retro-furb'ng and building speakers for over 35 years and I think it's time to build something modern and more equipped for our changing needs. I have no shop or access but I can probably handle modifying something to build this. It's just the noise I'm worried about. I'm also not a fan of just using passives in a L R box. Mixing the back waves in a single cabinet, regardless of the style of enclosure is not efficient and things get muddy in the mids once you start affecting cones with competing crosstalk of the back waves. I'm guessing we still don't have a quiet board in this arena. I could build a box with a TPA3116 2.1 50W+50W+100W board with an AUX jack only - and then just use an external BT device but UGH!!!! You get me on that. Thanks for all your hard work here!
Thanks for posting the video and the build file! Any chance of adding the battery module to the file? I'm a little confused about which hookups go where on that board. I'm assuming ac adapter to battery module to amp board.. just not sure which plugs to use.
I purchased the 2x50W one for a build I am working on. I was drawn to them because of the lithium ION battery board and the other items that are all made to go with them.
So quick question... If you opt for the battery pack, does the AC adapter charge the batteries or just power the board? Which power source is primary once adapter is plugged in?
I just stumbled upon your youtube channel a couple months ago..(It came up on my recommended page as did this video today!) I've never built a speaker before, but After watching your videos, I feel like I could. Just hit the subscribe button and am looking forward to Utilizing the inspiration I've found here.. Thanks!
I have a pair of Dayton Audio B652 amp-ed by a Lepai 2020+. They sound decent for my present needs, but I am thinking about some changes, like getting rid of all the wires by integrating the amp into the speaker, also integrating a bt receiver into the chain and a sub out for a future addition of a sub. This module you present here seems to be closer to my needs than the Lepai. What do you think?
I just ordered the entire board kit. Is there a way I can add a bass and treble control to this? Also I'm ordering my speakers from PE and want to go with either 6.5's or 8's. Since I've never seen or heard how these amps perform, do you recommend I go 4ohm or 8ohm? Love your videos, btw. Awesome stuff.
Using this for bluetooth speakers, do you think the sound would be better with a pair of full range speakers, or can it handle 2 2way crossovers and it´s pair of 6.5" and tweeter? Any ideas?
I really like the SANWU amp modules, similar to these. The BT and other accessories are separate daughter boards, but 15W - 200W stereo & 2.1modules = very handy and flexable. Uses the TDA and TPA amp chips. A lot of BT audio devices will have feedback noise if you power your audio source off the built-in 5V supply when using the line-in (like ipod or phone). I wonder if your hack will work with these too?!
I'm very new to this and this is gonna sound like a dumb question but here it goes. So from my understanding this amp board is powered through the battery pack that you showed in the video with the 18650's and how is that connected i guess is my question. I guess i'm confused on the battery pack and then you also showed the wires that you said are for power. So do you need to purchase a charger for the power and if not or if so, how do you charge it? Thanks. BTW I love your videos and how creative your speaker build videos are.
I built a 100w reciever for my living room / dining area about 8 years ago using a SURE amp and a SURE bt receiver board powered by a 12v power supply. My issue is that my green indicator light does not always come on, on my bt reciever so no connection. Recommendations for a replacement bt board??
I have a Klipsch promedia 2.1 setup,and the amp in the sub is burned up.Would this work for it? Not planning on using batteries,and would like the bluetooth option..Thanks for your time
Hey Kirby about to pull the trigger on my first build with this system, I had a few questions about wiring 1. Does the amp board handle the power distribution according to what cables or expansion boards are installed ( lithium battery board) or do you wire power directly to the battery board? dont want to burn up my amp by connecting 19 VDC, 1-5A power adapter to the wrong spot. 2. Is it a bad idea to enclose the 19 VDC, 1-5A power adapter in the speaker case. I was wondering if heat given off inside would damage the amp board long term. 3. Can you connect multiple lithium battery boards to extend play time for the build? Thanks for any help given! Its going in a 50 cal ammo box with 2 full range 4in drivers a bass port 5 in x 7 in x 11in
Great video . Just purchased the components you listed to build my first Bluetooth speaker . I will eventually have a video on my channel of the build once complete.
question: two drivers and two bass radiators, positive and negative wires have to be connected to the drivers in reverse ( switching - with + )? So when is punching the air inside the box to push the radiators outwards? Thanks
Looks like the same board (KAB-230) from Parts Express, just re-branded. Have the same battery extension, etc. Where did you splice the on/off switch in, and I would like to add an led voltmeter to monitor battery supply. Any suggestions, hints?
Are the li-ion battery boards 'stackable' in any way? I would like to be able to have at least two boards run in parallel for projects that are a little more power-hungry. EDIT: Even if it meant having two 18650 cells per 'slot' on the board. Is that possible? Obviously two cells won't physically fit into one slot, but they could be wired in right? From my very rudimentary understanding, this should be possible as long as the cells are all the same and equally charged before connection?
Is it possible to extent the range of the Bluetooth signal on the Wondom 11161 with either an add on board or by soldering a MMCX connector with an 2.4GHz rubber duck antenna to the antenna trace on the board? im building a wireless speaker box for use outside and want extended range (up to 300') as well as the ascetics of an external antenna.
Is there an updated video for a Bluetooth amplifier board or are you still using the Sure/Wondom amp or have you switched to Dayton? The interesting and useful feature of the Sure boards is the programmable DSP in my opinion.
curious how well it sounds. . I've been looking at various Cass d mini blue tooth amps and the prices vary so much, not to mention the false power specs for many of them.
what cross over type would you use with this board?? Keeping the size small i was wondering what speakers you recommend? I was going to go with a conservative car audio speakers.
I found your awesome excellent informative videos because I am planning my own build. I really like this board, but really want to include airplay. Have you found a good way to do Bluetooth and airplay? Thanks.
Say I wanted to use the JAB1 w/ the Lithium extension, is there a port for plug in charging so the batteries dont have to be removed for each charge? And specified charge voltage/amperage? Thanks. Looking forward to seeing this in use.
On your guide the left and right speaks output is backwards, at least it is to the Dayton audio board I have in front of me. Also is the board capable of bridged mono? I see some of your builds are single channel so are you bridging right and left?
Yeah I have had two boards shipped. 1 from there eBay store and from there online store. Both arrived in a week or two and ready to go. Nice boards. Sometimes a little trouble with the Bluetooth but a little switching it on and off again seems to work.
Hi, I've two old speakers of a record player lying around which is kind of antique probably from the 80s and want to make those Bluetooth enabled. I plan to use the Bluetooth amplifier audio board but I want how to select the right one (ohms and watts) for the speaker box I have and also as I'll be adding that to a single speaker so I want the audio output to be single channel. can you please help me how to check the specs of my speaker box and then how to get the right Bluetooth Audio Reciever amplifier for it?
Great vids, thanks for taking the time out. I bought a bunch of old radios and boom boxes. I would like to convert them into Bluetooth speakers using the existing speakers and amps. Any thoughts? Btw i don't really know jack about this kind of stuff but I have a diy state of mind. Help please!
Hi Kirby, Not sure if you can and wasnt sure where to ask you but my question does concern this board. Ive just bought the JAB2 board, 18650 charging module and aux module. Great sounding amp, just what I needed except.....my 18650's are charging BUT I dont know how to get them to power the amplifier...Works fine when powered by a laptop brick but nothing when I disconnect....? I tried to find your blog (mentioned in this video) but its not there, just a 404... Please do you have any advice...?
Great info. I've been bumbling through my own little speaker project for a while. My biggest hurdle has been available of parts - in the UK the only readily available drivers are brands called Monacor and Visaton, neither of which compare favourably with the likes of Dayton Audio or Peerless, or even my little Fountek FE85. Do you have any experience with either of these less quality brands and their 3" to 4" full range drivers? (I'm sticking to full range until I get my head around cross-overs). Cheers
Hi mate great video! One Question.. Do you think it would be fine with this kind of products to add a crossover board between the amp board and the speakers? I'm about to use the KAB 250 but I couldn't find any feedback from users with a crossover board in between! thank you and take care !
Hi, Kirby, how are you? Can you help me with a doubt? The site that you recommends(parts-express.com) is offering now an Bluetooth amplifier module made by Dayton áudio, you know which one is better(dayton or sure)?
hey i ve been thinking of building something like a JBL xtreme with passive radiator. i have narrowed down to few components. bluetooth board, crossover crcuit from banggood, passive radiators from aliexpress. just not sure about the woofer driver. can i use a full range speaker and connect to the bass of crossover?
hey Kirby- I'm building a massive headboard for my bedroom complete with LED lighting. I think I should add speakers. I've got some car speakers, would love to incorporate Bluetooth, I have no idea what I'm doing. I can handle wiring, but am at a loss as far as power supply and using a blue tooth board, etc. Any help?
Pardon the possibly stupid question, but is there a Bluetooth Speaker Amp Board that have >30w and have an onboard sub channel? I'd like to make a speaker with dual speakers and a sub.
Questions: Hey Kirby, great vids, keep it up! Those speaker wires in the wire kit look really really thin, Any idea what gauge they are? Is the amp powerful enough to warrant using better speaker wires? (if using larger /more demanding speakers of course).
Hi. Just a quick question from total noob - if I would like to build myself internet radio style device with wifi, bt etc. I can use this board and connect it to audio output of for example a raspberry pi ?? This is only amp? It does not have DAC part - this would be from a raspberry pi? (Or a phone using BT ?) Thanks and have a nice day.
I don't know a whole lot about this, but I believe it depends on the software you are using on the Pi. Some require a DAC on the Pi and some don't. This is just an amplifier board, though. You would need some sort of DAC before this board. Thanks for watching!
Hi Kirby, grate vids. Many thx, pleasure to watch. Do you have any suggestion what kind of small speakers and passive speakers (radiators) can I buy on alliexpres, to be decent quality? Like to build portable speakers like Jbl charge, flip, Bose soundlink mini ets but with my own hands :). Thx in advanve. Keep up roling vids. They are grate :)
Hey, great channel, I'm just getting into speaker building so this is an awesome resource! I have one of these boards but I'm not finding it overly loud, I'm running a 12v5A supply, would a bigger power supply help? Which one do you use? Thanks.
You make some great looking speaker cases! The JAB boards by auditronica are great! I'm a week away from starting to work on a programmer for their digital signal processing boards.
Hi! Just seen your video and youve been really helpful with my speaker build, i was wondering if you could use a micro usb port to charge instead of barrel plug. Also would this work with one speaker so mono instead of stereo? Thanks! Keep up the good work Kirby!
Hi I got the complete package, but I get a bit confused with the battery board, since there was no manual to find, can you please as well show how you connect the batteries?
hey Kirby, great videos learned a lot built my first bluetooth powered speaker, do you have any recommendations for a 2.1 bluetooth amplifier board 2.1 for sub thanks
Hey, James! Watts aren't necessarily a good metric for quality of product. The TDA7492P is a good amp for DIY speaker builders, but it has build quality and reliability problems. I've had some boards work great, while others have big problems. What I think puts the Wondom line over the TDA7492P boards is the accessories and add-ons that are available for it. The wiring kit makes setup easy and the extension and battery board makes it really versatile. Tie that all together with reliable build quality and you've got a pretty damn good amp. Thanks for watching!
yeah that's very true. I was trying to weigh the pros and cons, basically when I build my Bluetooth speaker I want it to be as loud as possible but not necessarily the size of a boombox. However i am aware that you need a balance of audio quality and audio output. I do like this Wondom board because of what you mentioned, which is all of the easily added on features.
Thanks for your input. In terms of audio quality. How does this board compare to the TDA7492P? Does it have a good low range frequency response (bass)?
is there a power supply that you would recommend? I'm looking into making a powered speaker, one without a battery pack and one with rechargeable batteries. love the videos and I'm looking forward to the nest speaker build.
Hi, i had sony n990w blu ray player now the player amp board is not working how can i connect my 4 speakers 1 center speaker and 1 woofer to any amp. and how and where i can find such board. Thanks ( My player was 1000W)
Kirby, have you made a speaker that runs off a battery pack? Cause i find it hard to find a battery pack or info to make one. Im looking to make a portable speaker with enough battery to last all day... Can you help me please xD
I believe that wire on the aux cable that you removed is a ground. I had the same problem with this board and the seller said the fix was to tie this wire to the ground (one of the screw holes in the upper right corner). Seems like a common problem as I got this feedback very quickly from them.
did grounding the wire help?
Yes it did fix the problem. Guess I didn't mention that in the original comment.
Grounding the wire turns bluetooth on on my KAB-215 board. So, what I've found is that BT -> R(in) is not even necessary. You can switch on BT module via BT -> GND.
I still get feedback, any added help for me?
4 wires for a stereo aux input seems odd to me.
The only time I can think of that would need 4 wires would be, if you're including a microphone input.
or some charging capability through the aux, which to me sounds like a stretch..
either way, it makes sense that the feedback would come from the 4th wire as I would consider that a bad ground. .remove the bad ground and remove the ground loop feedback.
Something people should be aware of with these amps. The watts ratings are bogus. Whatever SURE (or any manufacturer) rates these, the usable output is actually around half. Just take a look at the spec sheets.
They are rated 10% THD at full output and will sound like garbage on any set of speakers. However, they are generally 0.1% or less THD at around half the rated output.
Also, the published ratings are at 4 ohms. Most home audio is 8 ohms. So really, if you have a 50 watt amp, for 8 ohm speakers, usable watts are 12.5.
And because of all the marketing BS over the years, most folks don't realize 12 watts is cranking on good speakers.
You don't need a true 100W per channel. Very few speakers could actually take 100W.
Unless you have huge speakers, with multiple woofers, multiple midrange drivers and a tweeter, an amp like this rated at 50-100wpc will be more than enough to drive your speakers beyond their rated wattage.
Most speakers will be 80-90dB at 1 watt, 1 meter. Most of the time, you will not be using 1 watt.
I totally agree with you on the power and how much it's changed over the 20 years. The power ratings that is. I installed car audio for about 5 years in the mid-90s. We never used more than 150 to maybe 250 watts per subwoofer. Now I do know that the Rockford Fosgate amps that we used worth heavily underrated say for instance the punch 60 was supposedly 30 x 2 Watts at 4 Ohms. Testing last year showed that this amp actually put out around 80 x 2 at 4 Ohms! We all knew something must be going on but of course you didn't have the internet back then and the amp was also around $300 so strangely we had to throw the spec sheet out the window lol. But still, we did not run the Thousand watts per sub that people are doing now and not making that much more volume or SPL. And this is not only with subwoofers but front stage drivers as well. And amplifiers and speakers have become more efficient so why do we need 100 Watts for each 6.5 inch coaxial in each door? LOL we don't! So yes 12.5 clean repeat clean, watts, is very adequate.
Still, even today, they still will not get away from putting those large Peak or Max wattage numbers on the box and marketing materials.
Don't even get me started on power wiring and additional batteries! Again, class D amplifiers have become almost 50% more efficient than the older a b amplifiers but now all of a sudden we need 4 gauge and sometimes 0 gauge runs of expensive wiring or even welding cable! I took out my older Rockford Fosgate Punch 200 DSM amplifier which is capable of making 400 plus watts and does so easily on a gauge cable that can be up to 20 ft long!
Thank you for bearing with me I know it's car audio but still it's audio and it's wattage! I appreciate everyone.
Hello all, my kit arrived today and I haven't been able to replicate the feedback noise from the audio jack as shown here by Kirby. The only difference that I can see is that I used the full width cable supplied with the daughter board (input and usb).Maybe a V2.0 daughter board.
Sounds good though. Box building this weekend.
To avoid confusion, class d amps are not digital, the "d" does not stand for digital and its only similarity is that it uses switching transistors. The bluetooth/usb modules are the only digital parts.
True, the D does not stand for digital, but the "digital" refers to the digital control of the switching transistors. You can find more info here: www.audioholics.com/audio-amplifier/the-truth-about-digital-class-d-amplifiers Thanks for your input and for watching!
It's still not digital. Although the switching transistors are used in saturation, i.e. fully on or off, akin to how they are used in digital equipment, the timing of them turning on or off is not time-discrete like it would be for example in a digital direct delta-sigma amplifier, but analogue.
Siana Gearz It is digital! It is value-discrete :^)
It's not digital unless it's discrete in all dimensions :( Sorry to disappoint and i know it's nitpicking because it really doesn't terribly matter, but it's true.
Siana Gearz I know, it's nitpicking and I know it doesn't matter. I guess it still kinda worked setting you off :p Cheers! :^)
I think your speaker builds are impressive. Would love to see how you would approach a build using a chromecast audio (with optical output) instead of bluetooth.
I got one the JAB 2 50x2 boards with all the the extension boards from China 4 months ago, and have never experienced any noise with mine. Its been working great, you may have got a faulty unit. I agree with you these are the nicest little amps to come out so far. Did you know you can add a couple more battery boards to get longer run time? It still stays at 12 volt from what i understand. I like the videos, keep em coming!
I actually ordered four boards from Parts Express and all of them had this problem. I also talked with he customer service there and they said all their boards are experiencing this. I'm thinking they might have received a bad run from Sure, but that would probably still be hundreds, if not thousands, of boards with this potential issue. Such a bummer! I'm super glad it's a pretty easy fix though. I hadn't tested chaining the battery boards yet, but I suspected that was possible with the multiple connectors not he back of the board. Pretty rad! Thanks for watching and chiming in!
I just figured it out, re read the specs, I'm using the AA-JA11112 Interface Extension Board and it comes with a ground loop isolator built in, so that could be why I haven't experienced any noise issues.
Oh right! That's totally it. The issue only seems to happen with the aux in jack that's included with the wiring kit.
Was that wire you removed troubled from a improper ground design causing the feedback?
Were you talking about the background hissing or the light "feedback" because a lot of cheap bluetooth speakers have that hissing and if eliminating a wire from bluetooth to aux switching is the solution, I'm off to test this!
Hi will you be doing a build incorporating this and doing plans for it
I will be! Thanks for watching, Simon.
No worries, love your chanel, given me some great insight to building speakers, will be purchasing some plans shortly, just wish there were plans for the Nirvana ha ha
Hey Kirby, do you still feel this is the best bluetooth amp board? If not which would you now recommend? I like the fact that you care what the speaker looks like when its finished and not just throwing random things together and calling it a "speaker".
I have used several of the JAB1 series amplifiers w/battery charger. I have never had the feedback that you experienced. I will definitely keep a look out for any issues. Also be aware the speaker outputs on the JAB1 are labeled incorrectly and puts the speakers out of phase. I really wish the speaker wires were not all black and 20ga wire instead of 22ga. I make custom molex connectors with upgraded wires gauges for the speakers, power input (upgrade to 20ga) and the charge cable (upgrade to 22 ga). Great video series Kirby!
Hi guys! Which kind of power switch do I need to use with the switch connector on the board? Thanks for some great videos!
just any power switch wil work normaly
I used it in a bluetooth speacker DIY with 6" speacker and it's work very well, the only trouble was the battery, the size are not perfect for 18650 lithium battery but if you push very very hard you can put in it. Also 12v are not enough for delivering the max volume, but it's satisfying for outdoor. Very clean amplifier with great sound, not bassy like bt speacker as bose ect... I can't wait to see what you will make with this board
Great video,could i run this board of a 12v car battery?
Im planning on building an ammo can Speaker with all the components you mentioned in the video. I want good bass as well as treble. What speakers would you suggest?? Should I get a woofer + tweeters?? Or full range speakers ??
Great Video! Can you Tell me how to wire this board for a mono speaker? The build plans assume the optional second speaker but I really want to just have a single speaker running mono? I can't find any documentation on how to wire this that is consistent.
I plan on doing a DIY copy of the Sony SRS X-77. DOSS Audio recently made a budget version with some decent tuning but the enclosure had serious resonance issues. What can be done today for a 2.1 build with BT? My design will have isolated mains and a subwoofer with a passive radiator. I've been retro-furb'ng and building speakers for over 35 years and I think it's time to build something modern and more equipped for our changing needs. I have no shop or access but I can probably handle modifying something to build this. It's just the noise I'm worried about.
I'm also not a fan of just using passives in a L R box. Mixing the back waves in a single cabinet, regardless of the style of enclosure is not efficient and things get muddy in the mids once you start affecting cones with competing crosstalk of the back waves. I'm guessing we still don't have a quiet board in this arena. I could build a box with a TPA3116 2.1 50W+50W+100W board with an AUX jack only - and then just use an external BT device but UGH!!!! You get me on that. Thanks for all your hard work here!
Thanks for posting the video and the build file! Any chance of adding the battery module to the file? I'm a little confused about which hookups go where on that board. I'm assuming ac adapter to battery module to amp board.. just not sure which plugs to use.
I purchased the 2x50W one for a build I am working on. I was drawn to them because of the lithium ION battery board and the other items that are all made to go with them.
So quick question... If you opt for the battery pack, does the AC adapter charge the batteries or just power the board? Which power source is primary once adapter is plugged in?
I just stumbled upon your youtube channel a couple months ago..(It came up on my recommended page as did this video today!) I've never built a speaker before, but After watching your videos, I feel like I could. Just hit the subscribe button and am looking forward to Utilizing the inspiration I've found here.. Thanks!
Any such boards are there which gives 4.1 or 5.1 channels in bigger output?
Hey Kirby, do you circuit for 3.5mm to 5-in-1 home theater convertor circuit..
I have a pair of Dayton Audio B652 amp-ed by a Lepai 2020+. They sound decent for my present needs, but I am thinking about some changes, like getting rid of all the wires by integrating the amp into the speaker, also integrating a bt receiver into the chain and a sub out for a future addition of a sub. This module you present here seems to be closer to my needs than the Lepai. What do you think?
I just ordered the entire board kit. Is there a way I can add a bass and treble control to this? Also I'm ordering my speakers from PE and want to go with either 6.5's or 8's. Since I've never seen or heard how these amps perform, do you recommend I go 4ohm or 8ohm? Love your videos, btw. Awesome stuff.
Using this for bluetooth speakers, do you think the sound would be better with a pair of full range speakers, or can it handle 2 2way crossovers and it´s pair of 6.5" and tweeter? Any ideas?
I really like the SANWU amp modules, similar to these. The BT and other accessories are separate daughter boards, but 15W - 200W stereo & 2.1modules = very handy and flexable. Uses the TDA and TPA amp chips.
A lot of BT audio devices will have feedback noise if you power your audio source off the built-in 5V supply when using the line-in (like ipod or phone). I wonder if your hack will work with these too?!
Would a 5v/5v isolator solve this, or is the noise further upstream?
good to meet someone who know how to explain and pronounce well.
Is there any difference between the new dayton boards VS the sure boards?
I'm very new to this and this is gonna sound like a dumb question but here it goes. So from my understanding this amp board is powered through the battery pack that you showed in the video with the 18650's and how is that connected i guess is my question. I guess i'm confused on the battery pack and then you also showed the wires that you said are for power. So do you need to purchase a charger for the power and if not or if so, how do you charge it? Thanks. BTW I love your videos and how creative your speaker build videos are.
I built a 100w reciever for my living room / dining area about 8 years ago using a SURE amp and a SURE bt receiver board powered by a 12v power supply. My issue is that my green indicator light does not always come on, on my bt reciever so no connection.
Recommendations for a replacement bt board??
what do u think about the jab2? i am experiencing very little bass using bluetooth, great bass using aux. are yours behaving like that too?
Another brilliant video Kirby! It is indeed a great board, just not perfect yet.. Would love to see a version 2!
Thanks, Man! I would too!
@@KirbyMeetsAudio a version 2 would be great they seem to have updated the product
Yes plz I'm a noob and need help
I have a Klipsch promedia 2.1 setup,and the amp in the sub is burned up.Would this work for it? Not planning on using batteries,and would like the bluetooth option..Thanks for your time
What amps do you use now?
Hey Kirby about to pull the trigger on my first build with this system, I had a few questions about wiring
1. Does the amp board handle the power distribution according to what cables or expansion boards are installed ( lithium battery board) or do you wire power directly to the battery board? dont want to burn up my amp by connecting 19 VDC, 1-5A power adapter to the wrong spot.
2. Is it a bad idea to enclose the 19 VDC, 1-5A power adapter in the speaker case. I was wondering if heat given off inside would damage the amp board long term.
3. Can you connect multiple lithium battery boards to extend play time for the build?
Thanks for any help given!
Its going in a 50 cal ammo box with 2 full range 4in drivers a bass port 5 in x 7 in x 11in
what is the best amp and battery pack to use for great bass and sound and long battert life?
Great video . Just purchased the components you listed to build my first Bluetooth speaker . I will eventually have a video on my channel of the build once complete.
question: two drivers and two bass radiators, positive and negative wires have to be connected to the drivers in reverse ( switching - with + )? So when is punching the air inside the box to push the radiators outwards? Thanks
No, you don't need to change polarity when using a passive radiator. Just wire the speakers normally. Thanks for watching!
Thank you for inspiration and motivation! Your woodwork, and videos.....great job!
Hey out of curiousity, i checked the website for the bluetooth audio amp, but they arent available anymore. Is there an alternative youve beeb using?
Looks like the same board (KAB-230) from Parts Express, just re-branded. Have the same battery extension, etc. Where did you splice the on/off switch in, and I would like to add an led voltmeter to monitor battery supply. Any suggestions, hints?
Are the li-ion battery boards 'stackable' in any way? I would like to be able to have at least two boards run in parallel for projects that are a little more power-hungry.
EDIT: Even if it meant having two 18650 cells per 'slot' on the board. Is that possible? Obviously two cells won't physically fit into one slot, but they could be wired in right? From my very rudimentary understanding, this should be possible as long as the cells are all the same and equally charged before connection?
It does help indeed! Thanks!
is there a way to bridge both channels to mono to drive a single crossover for a tweeter woofer combo?
What could you recommend for 15 watts speakers ?
Is it possible to extent the range of the Bluetooth signal on the Wondom 11161 with either an add on board or by soldering a MMCX connector with an 2.4GHz rubber duck antenna to the antenna trace on the board? im building a wireless speaker box for use outside and want extended range (up to 300') as well as the ascetics of an external antenna.
Would it be possible to make a bluetooth stereo set of loudspeakers?
Hey Kirby! Where do you buy your speakers from? It all looks really great!
Hey! Usually from Parts Express. Thanks for watching!
It's an honor ;)
Is it possible to make 3 speakers play together with bluetooth?
Is there an updated video for a Bluetooth amplifier board or are you still using the Sure/Wondom amp or have you switched to Dayton? The interesting and useful feature of the Sure boards is the programmable DSP in my opinion.
curious how well it sounds. .
I've been looking at various Cass d mini blue tooth amps and the prices vary so much, not to mention the false power specs for many of them.
what cross over type would you use with this board?? Keeping the size small i was wondering what speakers you recommend? I was going to go with a conservative car audio speakers.
So the dayton kab amps are the same as the wondom jab amps? Will they interface with each other?
Hey Kirby. Can you review or say something about the mini F900 amp by NobSound?
do you still have the same problem when using the aux on the extension board instead?
May I ask if there's any written tutorial for this board for diy novices? Many thanks!!
I found your awesome excellent informative videos because I am planning my own build. I really like this board, but really want to include airplay. Have you found a good way to do Bluetooth and airplay? Thanks.
Say I wanted to use the JAB1 w/ the Lithium extension, is there a port for plug in charging so the batteries dont have to be removed for each charge? And specified charge voltage/amperage? Thanks. Looking forward to seeing this in use.
Hey! Yep, you can charge the batteries from outside the box. I believe you need a 19v 4a charger to charge them. Thanks for watching!
Thanks, recently found you videos and they are FANTASTIC.
On your guide the left and right speaks output is backwards, at least it is to the Dayton audio board I have in front of me. Also is the board capable of bridged mono? I see some of your builds are single channel so are you bridging right and left?
Can you help me out on this?
I and a couple of other people have been wondering why the boards offered by Dayton Audio seem identical. Are they?
wish there were more boards Like that one. love the flexibility of install. shame the shipping from the states to nz kills getting them
r.ebay.com/dUmM9M This is from Sure's own ebay shop. Free international shipping!
Thanks Joos you are a star!!
joos blankers
Yeah I have had two boards shipped. 1 from there eBay store and from there online store. Both arrived in a week or two and ready to go. Nice boards. Sometimes a little trouble with the Bluetooth but a little switching it on and off again seems to work.
What do you think about taking it to small bluetooth speaker like 2x5W 8ohm Visaton and powering by 3,7V 18650 battery?
I ask this question on your website, no reply. Your choice, the Lepai 2020t or this one?
Greetings from Greece ! Do you think TAS5613 2.1 amplifiers could be a better deal?could you make a review also please?
This might be random, but what is the mat that you are building your patys on with the grid? And where could I get one
You can find it here: amzn.to/2cWKNuD Thanks for watching!
Is the led pack compatible with the KAB-250 2x50W ? Where is the battery board ? Thanks ;)
Hi,
I've two old speakers of a record player lying around which is kind of antique probably from the 80s and want to make those Bluetooth enabled.
I plan to use the Bluetooth amplifier audio board but I want how to select the right one (ohms and watts) for the speaker box I have and also as I'll be adding that to a single speaker so I want the audio output to be single channel. can you please help me how to check the specs of my speaker box and then how to get the right Bluetooth Audio Reciever amplifier for it?
Great vids, thanks for taking the time out. I bought a bunch of old radios and boom boxes. I would like to convert them into Bluetooth speakers using the existing speakers and amps. Any thoughts? Btw i don't really know jack about this kind of stuff but I have a diy state of mind. Help please!
Hi Kirby, Not sure if you can and wasnt sure where to ask you but my question does concern this board. Ive just bought the JAB2 board, 18650 charging module and aux module. Great sounding amp, just what I needed except.....my 18650's are charging BUT I dont know how to get them to power the amplifier...Works fine when powered by a laptop brick but nothing when I disconnect....? I tried to find your blog (mentioned in this video) but its not there, just a 404... Please do you have any advice...?
Great info. I've been bumbling through my own little speaker project for a while. My biggest hurdle has been available of parts - in the UK the only readily available drivers are brands called Monacor and Visaton, neither of which compare favourably with the likes of Dayton Audio or Peerless, or even my little Fountek FE85. Do you have any experience with either of these less quality brands and their 3" to 4" full range drivers? (I'm sticking to full range until I get my head around cross-overs). Cheers
Have you ever tried the Dayton audio KAB-250?
I have the KAB-250 and I'm very happy with the sound quality and power.
Hi mate great video! One Question.. Do you think it would be fine with this kind of products to add a crossover board between the amp board and the speakers? I'm about to use the KAB 250 but I couldn't find any feedback from users with a crossover board in between! thank you and take care !
hey Kirby can you make something like the diamond box with the sure boards? I think they use Dayton speakers.
Hi, Kirby, how are you? Can you help me with a doubt? The site that you recommends(parts-express.com) is offering now an Bluetooth amplifier module made by Dayton áudio, you know which one is better(dayton or sure)?
hey i ve been thinking of building something like a JBL xtreme with passive radiator. i have narrowed down to few components. bluetooth board, crossover crcuit from banggood, passive radiators from aliexpress. just not sure about the woofer driver. can i use a full range speaker and connect to the bass of crossover?
is there a different one that has the simple wire connect like this one?i want one that has a good cooling down system
Any alternatives for this..?. Not sold in my country..
hey Kirby- I'm building a massive headboard for my bedroom complete with LED lighting. I think I should add speakers. I've got some car speakers, would love to incorporate Bluetooth, I have no idea what I'm doing. I can handle wiring, but am at a loss as far as power supply and using a blue tooth board, etc. Any help?
Pardon the possibly stupid question, but is there a Bluetooth Speaker Amp Board that have >30w and have an onboard sub channel? I'd like to make a speaker with dual speakers and a sub.
Lester Suggs look up how to make a active crossover and build it to a lower frequency
Questions:
Hey Kirby, great vids, keep it up!
Those speaker wires in the wire kit look really really thin, Any idea what gauge they are?
Is the amp powerful enough to warrant using better speaker wires? (if using larger /more demanding speakers of course).
Hi.
Just a quick question from total noob - if I would like to build myself internet radio style device with wifi, bt etc. I can use this board and connect it to audio output of for example a raspberry pi ?? This is only amp? It does not have DAC part - this would be from a raspberry pi? (Or a phone using BT ?)
Thanks and have a nice day.
I don't know a whole lot about this, but I believe it depends on the software you are using on the Pi. Some require a DAC on the Pi and some don't. This is just an amplifier board, though. You would need some sort of DAC before this board. Thanks for watching!
at 4min and 30sec on the video what is the name of the Bench Mats are you using what it called and where can i get one.
It's a cutting mat. You can find it here: amzn.to/2dllvcM Thanks for watching!
Kirby Meets Audio
thanks your the best
Hey kirby,
Is it possible to wire 2 50 watt speakers to 1 50 watt channel as long as the independence of the speakers fits?
any crossover you would recommend for this board 100w board
Hi Kirby, grate vids. Many thx, pleasure to watch. Do you have any suggestion what kind of small speakers and passive speakers (radiators) can I buy on alliexpres, to be decent quality? Like to build portable speakers like Jbl charge, flip, Bose soundlink mini ets but with my own hands :).
Thx in advanve. Keep up roling vids. They are grate :)
Hi, is there any way of wiring a headphone jack into this board? Trying to build a bluetooth amp for a mobile phone/tablet
Hey, great channel, I'm just getting into speaker building so this is an awesome resource! I have one of these boards but I'm not finding it overly loud, I'm running a 12v5A supply, would a bigger power supply help? Which one do you use? Thanks.
Do you ever build Bluetooth speaker for you viewers , I'm not a good builder, but would love one, thanks
You make some great looking speaker cases!
The JAB boards by auditronica are great! I'm a week away from starting to work on a programmer for their digital signal processing boards.
Any idea what battery life would be in a typical setup with the three 18650's?
Sure claims more than 24 hours. Thanks for watching!
I've let mine run all day long in my shop. I havn't tested it further then 8 hours.
these sure electronic boards are awesome. thanks for sharing. great videos.
I agree! Thanks for watching!
hey Kirby,
i want to ask you we're u can buy that ge b2 amplifier i didn't find it
Hi! Just seen your video and youve been really helpful with my speaker build, i was wondering if you could use a micro usb port to charge instead of barrel plug. Also would this work with one speaker so mono instead of stereo? Thanks! Keep up the good work Kirby!
Hi I got the complete package, but I get a bit confused with the battery board, since there was no manual to find, can you please as well show how you connect the batteries?
hey Kirby, great videos learned a lot built my first bluetooth powered speaker, do you have any recommendations for a 2.1 bluetooth amplifier board 2.1 for sub
thanks
Kirby, how would you put an inline volt/power meter? I would like to know when I need to charge the batteries.
so TDA7492P is a really common board for Bluetooth speaker projects, what makes this board better? does the TDA7492P output more watts ?
compare to non-p model, it doesn't need external heatsink to output 25w per channel, which are enough for project like this.
Hey, James! Watts aren't necessarily a good metric for quality of product. The TDA7492P is a good amp for DIY speaker builders, but it has build quality and reliability problems. I've had some boards work great, while others have big problems. What I think puts the Wondom line over the TDA7492P boards is the accessories and add-ons that are available for it. The wiring kit makes setup easy and the extension and battery board makes it really versatile. Tie that all together with reliable build quality and you've got a pretty damn good amp. Thanks for watching!
yeah that's very true. I was trying to weigh the pros and cons, basically when I build my Bluetooth speaker I want it to be as loud as possible but not necessarily the size of a boombox. However i am aware that you need a balance of audio quality and audio output. I do like this Wondom board because of what you mentioned, which is all of the easily added on features.
Thanks for your input. In terms of audio quality. How does this board compare to the TDA7492P? Does it have a good low range frequency response (bass)?
I too am curious to know how does this board compare to the TDA7492P? Does it have a good low range frequency response (bass)?
is there a power supply that you would recommend? I'm looking into making a powered speaker, one without a battery pack and one with rechargeable batteries. love the videos and I'm looking forward to the nest speaker build.
Hi, i had sony n990w blu ray player now the player amp board is not working how can i connect my 4 speakers 1 center speaker and 1 woofer to any amp. and how and where i can find such board.
Thanks ( My player was 1000W)
Kirby, have you made a speaker that runs off a battery pack? Cause i find it hard to find a battery pack or info to make one. Im looking to make a portable speaker with enough battery to last all day... Can you help me please xD
Hello Kirby I'm having problems with the QFX PBX - 710700BTL it just stop playing but the party lite still works can you help me fix this problem?
Yo Kirby, can you add an external Bluetooth antenna is mounting in a metal box?
Hey Kirby! It’s been 2 yrs now. Do you still think this is the best board or is there something new you found to be better?