I did something similar after watching your video! I took and old pair of PC speakers and mounted them in a wooden box I made. I found an amp on Amazon with bluetooth, added a battery pack and now have a nice little portable bluetooth speaker system. Thanks for the inspiration!
Very nice video. I like the way how you explained each and everything like putting a capacitor and reason for it, putting a resistance. I like your tools and the finished product. and in the end I came to know why my small speakers are always having little humming noise when attached to computer via USB port. Thank you very much Sorin for all your efforts.
i built this today and i must say i am very pleased with its perfomance , i used 4 ohm 3 watt speakers and where he connected the capacitor i put a 16 v 220 uf , it does not even switch off even when the volume is high , it sounds loud when the volume is low last year i bought the version with bluetooth on it , it sucks soooo bad , every time the 808 kicks in , it would swith off, guys if you are looking for a quick and easy way to build speakers ,I RECOMMEND GETTING THIS AMPLIFIER
My congratulations, an EXCELLENT VIDEO-CLASS. You have earned a BRAZILIAN REGISTRY. A small request, would it be possible to provide us with a Link with the Exact Material List used and the Welding Schemes of each Speaker individually? For someone like me who is starting in this World of Electrotechnology, this would be of enormous importance! Thank you, always continue like this !!!
Hi Sorin that's a nice project that i will certainly do ! a small tip : we can use a dc isolator to prevent those ground loops wich make this annoying buzzing sound, like that you can use the Same power supply for everything ! 😉
hi, thanks for the tip. I know about the DC isolator converter and I will definitely use one in a future video. but I wanted this to be a budget diy mini speaker system. I'm also planning to make other more complex audio systems in the future.
I used this little amp (the version with the volume pot onboard) with a pair of cambridge soundworks 1.25" speakers out of a creative travelmate, i built a box out of modellers plastic (styrene) that can be glued with polystyrene cement, fitted a pair of mini bass tubes out of styrene tubing porting out of the back (20mm wide tube), it's in the front of my antec P100 PC case on a socket 754 PC with an athlon64 3700+ CPU and Radeon9800 Pro graphics card (Motherboard is an ASUS K8V SE Deluxe) Its routed internally to my Soundblaster live 5.1 card running windows98SE, i also fitted a separate '3rd' speaker going directly to the soundblasters 'PC Speaker' output with a 100Ohm potentiometer this is for DOS sound (to control the bios beep volume level and DOS gaming/music sounds), i tell you what the sound quality from this little thing in my front drive bay is just incredible, it's real crisp and has a surprising amount of bass for a drive bay speaker, i cant recommend these things highly enough, they are incredible!
your speaker can be sold in market they look so good according to me and they also sound very good I also used p a m 8403 amplifier circuit with 4 ohm 3 watt speakers at each channel means at right channel the impedance of speakers is 4 ohm and 3 Watts and at the left channel also the impedance of speaker is 4 ohm and 3 watt but the circuit is getting too hot and it stop working when it is heated too much at full volume or little bit lesser than full volume but its sound quality is awesome.
Nice video. Very helpful information. I wished you had tested the amps drawn with the volume pot on maximum, while reducing the volume on the mobile. Cause it would be helpful to know how much current is drawn, in case we don't add the volume pot, with the mobile volume high vs low. I suppose the current (amps) drawn would be more when the mobile volume is high and much less when it is low. Right???
the current consumption of the amplifier is higher when the audio input is louder. it doesn't matter if the input level is set by the phone or by the potentiometer.
Hi, Sorin. I've been watching your videos and they are really helpful. Just a question about ground loop, from forums and other videos I saw them use the capacitor like what you installed to fix it. But I also saw some short the ground from audio input with the Vin (-). Is the latter safe and does it cause any damage in long term use? Thank you for all your efforts in sharing your electronics knowledge
Hi. That's not enough. to eliminate the ground loop noise you need a ground loop isolator, or you can power the audio amplifier and audio source with separate isolated power sources, for example separate transformer outputs.
By the way I planning to buy a pam8403 5w bluetooth amplifier And I only have 2× 4w speaker ...what should I put something to avoid blowing my speaker...🤗🤗🤗...I'll be happy If you'll reply.....please....😊😊😊
hi. you can decrease the input audio signal with some resistors. or you can add a resistor in series with the speaker drivers 4.7ohm 5W will probably work.
What if I don't have the wire for GND connection on 3.5mm jack. Is there any workaround? Without this GND connection, speakers are making buzzing sound.
Question: Is it possible or convenient to use two usb connectors in order to double the ammount of vatts received from a single 5V USB port? Would it really help to increase the power output to get a higher volume?
hi. for this amplifier it's recommended to use a power supply with 5V (max 5.2V) and 1A. most PCs USB ports have 0.5A and some have a voltage lower than 5V. that will work too. but there's no need to connect 2 USBs outputs, you will have the same output current.
I have connected this Bluetooth module chip with 8403. I have connected only 2 speakers 3w. When i am increasing volume the Bluetooth module restarts. Why it is happening like this?
The amp circuit has 3 watts per channel output..but you added two speakers on both channels.. Will it not overload amp?? Two parallel speaker reduces the total resistance to 4 ohm but increase the watt by double..
hi. that's not a problem. it's recommended to use speaker drivers a bit more powerful than the amplifier, so the speakers will not be pushed to the limit.
I liked this video.. I have a request can you make content for Arduino (Leonardo that is what I have) again. So the plan looks like a USB portable speaker. Because I want to learn and apply to my DIY controller with Speaker function via Arduino
salut. am sa folosesc la boxe mai mari. in clipul acesta am vrut sa fac cele mai mici si ieftine boxe, care se aud mai bine decat altele noi, care costa la fel sau chiar mai mult. daca am fisa tehnica a difuzorului, de obicei calculez cutiile.
Hi Sorin, another great video. Looks like I will be customising my parcel shelf in my car. As the power consumption is relatively low do you think you could make a base box using a slightly bigger speaker from your speaker stash? So what is next of the agenda? •powering them by 18650 lithium batteries. •adding a Bluetooth chip for portability.
:)) You got me! I really like this PAM8403 amplifier and I will use it in other future videos. I will also make a portable bluetooth speaker. I have some original ideas, but I also want to make my version of these common "diy speaker/charger/PSU" videos, that you can find on youtube, to see if I can make them better :) Thanks for your support!
hi. the audio jack is connected to the volume potentiometer. you can watch my video with 2x15W portable speaker for more info, also check the schematics in the description of that video.
this amplifier needs to be powered with 5V. a single lithium cell has a lower voltage. if you want to use a cell, you need to add a step up converter to increase the voltage to 5V.
Excellent video!!! Clear, short yet accurate and right to the point explanation !!! With one video I have learned everything I needed to know about speakers. I have a question though, with the same power (in this case 3W+3W), can you make them somehow even a little louder by using different pot or different amplifier for instance, without compromising quality of the sound ??? I'm asking 'cos I am currently working on a similar project, but speakers will be located further from the source? Great respect dude!
hi. thanks for watching, the amplifier cannot be modified, to be more powerful. but in the pam8403 datasheet is mentioned that it can be powered with max 5.5V. this way it can deliver 3.2W per channel with 4ohms speakers. so you can try to increase the voltage to 5.5V. the only alternative is to use a more powerful amplifier.
it depends on what power supply you want to give it. the laptop USB port can deliver 5V at 0.5A. if you want to use the USB as the power supply for the audio amplifier, the pam8403 is the best choice. if you want to use a separate power supply for your amp, you can use any amp you want.
HI Sorin, Awesome video. Question.. I am a teacher and I would like to make this for my electronics class with my students. I am planning on building this with a 3.7V battery with a step up module to 5V.. running a PAM 8403 bluetooth module board. with 5-10w 4 OHM Speakers. What size Capacitor should I use for the Wattage and Volts? And also, do I need the Potentiometer? why cant I just use the phone to turn volume up and down? Look forward to your response. Thanks Tim
hi. I suggest you use a 4700uF capacitor at 10V. if the amplifier board has a bluetooth module included, there is no need for a volume potentiometer. but if it's a simple amplifier board with a stereo jack input cable, you need a volume potentiometer, to adjust the audio level coming from the laptop/phone or any other device. the potentiometer also reduces the background noise, when there is no music, or when you listen at a low volume.
@@Sorin_DIY Thanks for the reply mate. Watching all the way from Australia. Would you mind explaining to me how you found that 4700uF would be a good choice? and what did you mean by 'at 10V'? the circuit is only running at 5V? Thanks in advance. Tim
I've modified and made a lot of transformers and power supplies so far. for big loads, 4700uF it's the minimum value capacitor to keep the voltage stable. of course, in most cases, a bigger value capacitor is better, but the capacitor will be bigger too. for a portable speaker enclosure, the internal volume is also important. big components will waste too much of the internal volume. so for a portable speaker box, 4700uF will be efficient enough and also not to big. the capacitor rated voltage must be bigger than the circuit voltage. you can use a 6.3V capacitor, but it's too close to the limit. you must be careful with the step up converter, not to get too close to 6V, or you will pop the capacitor. the next rated voltage value is 10V.
Hey bro i have 4 ohm subwoofer. It has more base and when increase volume it gives me Cracked and distorted sound pls twl me how to reduce some base.. Or clean that sound
did you try with a more powerful USB charger? minimum 2A. if the bass is still distorted, you can reduce it with a capacitor connected in series with the speaker driver. you need a non polarized capacitor with a capacitance between 100 micro farads (more bass) and 10 micro farads (less bass). if you don't find a non polarized capacitor, you can use 2 polarized capacitors (they are much cheaper and easier to find) in series to make a non polarized capacitor. but you need to connect the 2 capacitors in series with a common negative. and the capacitance will be halved. for ex 47microF + 47microF = non polarized 23.5microF capacitor.
I have 2 speaker 4 ohm 5watt will it be possible to run smoothly for both channel? it is recommend to use 3watt, but I don't have 3 watt speaker the only speaker what I have is 4 ohm 5watt I highly doubt that..i order pam8403 in Amazon but the product hasn't arrive yet I would like to know before I build please tell me sorin.
it will probably work. it depends on the quality of the speaker drivers. it's recommended that the speaker drivers have a higher rated power than the amplifier.
Thank you, my friend! It is as useful as i couldn't even imagine. All i needed to know. But i have a question: would my PAM8403 sound worst with 4Ohm 25W speakers than with 4Ohm 5W speakers?
hi. it depends on the speaker drivers build quality. theoretically the 25W speaker should be better, but if it's cheaply made, it will sound worst than the 5W speaker. I can't give you a direct answer, because I can't see the speaker drivers. my suggestion is to use the ones that have the better build quality.
you are probably powering the amplifier board with the same power source as the audio device and you are getting a ground loop noise. you need to use different power supplies for the audio device and the amplifier board. or use a DC-DC isolated converter, or a ground loop noise isolator.
hi. it depends on what speaker drivers did you use. I think the speaker drivers are too small for this amplifier board. you also need a good power supply, try it with a different 5V powerbank.
@@Sorin_DIY thanks bro its working perfectly just tell me one thing . when I increase volume then bass automatically increase so what can I use for increase bass?
you can add a non polarized electrolytic capacitor in series with each speaker driver. the value should be between 10uF (almost no bass) and 100uF (almost full bass) rated at 16V or more. if you don't have a non polarized capacitor, you can use 2 polarized capacitors in series, like I did in my home made speaker driver video.
that's because the charger is not isolated from ground loop, like transformers. you need an isolated converter to power the amplifier. or a ground loop isolator on the audio input.
Salut Sorin! Poti sa-mi spui cum se numeste chestia acea pe care o folosesti sa dai o gaura mare in lemn cu bormasina? Edit:Scuze ca iti spun deabea acum, spuneam mai devreme daca nu ti-as fi gasit canalul abea ieri :(
the amplifier works with 4, 6 and 8 ohm speaker drivers. 4 ohm speakers will give the loudest sound, but at high volume the sound quality will decrease. 4 ohm speakers will draw more current, if you speaker is portable, the battery will last less time. with 8 ohm speakers the max sound level will be lower. the sound quality will be better at max volume and the battery will last longer. I suggest 6 or 8 ohm speaker drivers.
hi. you need a dc-dc 5V isolated converter on the supply voltage. or a ground loop isolator noise filter on the audio input. or a separate power supply.
I did something similar after watching your video! I took and old pair of PC speakers and mounted them in a wooden box I made. I found an amp on Amazon with bluetooth, added a battery pack and now have a nice little portable bluetooth speaker system. Thanks for the inspiration!
Excellent build,, I bet they do sound much better in person. I love these little PAM8403s.
finally,a smart someone isn't using inches to measure.
thanks for your info, you video is amazing
Very nice video. I like the way how you explained each and everything like putting a capacitor and reason for it, putting a resistance. I like your tools and the finished product. and in the end I came to know why my small speakers are always having little humming noise when attached to computer via USB port. Thank you very much Sorin for all your efforts.
i built this today and i must say i am very pleased with its perfomance ,
i used 4 ohm 3 watt speakers and where he connected the capacitor i put a 16 v 220 uf , it does not even switch off even when the volume is high , it sounds loud when the volume is low
last year i bought the version with bluetooth on it , it sucks soooo bad , every time the 808 kicks in , it would swith off,
guys if you are looking for a quick and easy way to build speakers ,I RECOMMEND GETTING THIS AMPLIFIER
I'm quite sure the sponge makes a difference- it helps smooth out the hollow sound and it lowers the tuning frequency.
regarding the ground loop effect, you can use 2 1 to 1 audio Transformers to isolate the channel grounds
wow, this is a real MASTERPIECE...
Great idea to use laminate floorboard for this. I have them laying around as well.
absolutely amazing video. Keep it up dude!
Really a superb book shelf speakers you have made.
Great description of whole project also neat n clear with comparison.
My congratulations, an EXCELLENT VIDEO-CLASS. You have earned a BRAZILIAN REGISTRY. A small request, would it be possible to provide us with a Link with the Exact Material List used and the Welding Schemes of each Speaker individually? For someone like me who is starting in this World of Electrotechnology, this would be of enormous importance! Thank you, always continue like this !!!
Sos un genio, uso tus videos para practicar inglés y aprender sobre ciertos amplificadores... saludos desde argentina!
I got mine today and its really powerful and i love it
Great video and nice humor thrown in the build.
Hi Sorin that's a nice project that i will certainly do ! a small tip : we can use a dc isolator to prevent those ground loops wich make this annoying buzzing sound, like that you can use the Same power supply for everything ! 😉
hi, thanks for the tip. I know about the DC isolator converter and I will definitely use one in a future video. but I wanted this to be a budget diy mini speaker system. I'm also planning to make other more complex audio systems in the future.
Sorin - DIY Electrical Nerd Nice ! i'm waiting for it !!
Sorin, please add purchasing links for those killer vintage pliers
I used this little amp (the version with the volume pot onboard) with a pair of cambridge soundworks 1.25" speakers out of a creative travelmate, i built a box out of modellers plastic (styrene) that can be glued with polystyrene cement, fitted a pair of mini bass tubes out of styrene tubing porting out of the back (20mm wide tube), it's in the front of my antec P100 PC case on a socket 754 PC with an athlon64 3700+ CPU and Radeon9800 Pro graphics card (Motherboard is an ASUS K8V SE Deluxe)
Its routed internally to my Soundblaster live 5.1 card running windows98SE, i also fitted a separate '3rd' speaker going directly to the soundblasters 'PC Speaker' output with a 100Ohm potentiometer this is for DOS sound (to control the bios beep volume level and DOS gaming/music sounds), i tell you what the sound quality from this little thing in my front drive bay is just incredible, it's real crisp and has a surprising amount of bass for a drive bay speaker, i cant recommend these things highly enough, they are incredible!
Very neat work, well explained and audible illustration.Thumbs up
Just found your channel and I really like your style! Subbed!
I like your finishings and designs
Please make a easy mini audio amplifier
3w of power is based on combined channels. So the actual wattage is 1.5w per channel.
Really enjoyed the project. What's next? Maybe bluetooth sound bar...
thanks. I have many ideas, but it takes a lot of time to make every video... the sound bar is on my "to do list", but probably in a few months.
Bravo Sorin. A ieşit fain treaba :-)
Good idea, I built a 10w speaker like this
your speaker can be sold in market they look so good according to me and they also sound very good I also used p a m 8403 amplifier circuit with 4 ohm 3 watt speakers at each channel means at right channel the impedance of speakers is 4 ohm and 3 Watts and at the left channel also the impedance of speaker is 4 ohm and 3 watt but the circuit is getting too hot and it stop working when it is heated too much at full volume or little bit lesser than full volume but its sound quality is awesome.
Nice video. Very helpful information. I wished you had tested the amps drawn with the volume pot on maximum, while reducing the volume on the mobile. Cause it would be helpful to know how much current is drawn, in case we don't add the volume pot, with the mobile volume high vs low. I suppose the current (amps) drawn would be more when the mobile volume is high and much less when it is low. Right???
the current consumption of the amplifier is higher when the audio input is louder. it doesn't matter if the input level is set by the phone or by the potentiometer.
Thks a lot bro. Very helpful.
Your projects are interesting Sorin.
Subscribed.
Sorin, what if i make it with 2×(8 Ohm , .5W) speaker . One for left and other one for right?
it's ok, but it will be a little less powerful.
@@Sorin_DIY
Thanks buddy
Hey sorin please make a video on pam8403 upgraded version pam8406 5w+5w amplifier board
you're instructions, you're work, are really excellent sir, i really like it, thanks for sharing you're knowledge in some electronics stuff.. :)
Buna,am o intrebare, de exemplu daca as face boxele portabile ( cu acumulatori Li-ion) s-ar auzii pe fundal sunet de impamintare?
salut. daca ii pui baterie, nu se mai aude acel bazait.
@@Sorin_DIY MUltumesc!
great vid and well made, will it work just mono speaker?thanks
yes
Hi, Sorin. I've been watching your videos and they are really helpful.
Just a question about ground loop, from forums and other videos I saw them use the capacitor like what you installed to fix it. But I also saw some short the ground from audio input with the Vin (-). Is the latter safe and does it cause any damage in long term use?
Thank you for all your efforts in sharing your electronics knowledge
Hi. That's not enough. to eliminate the ground loop noise you need a ground loop isolator, or you can power the audio amplifier and audio source with separate isolated power sources, for example separate transformer outputs.
You could use isolated 5V power converter to eliminate that boozing sounds.
yes. but I wanted these speakers to be cheaper and more powerful than new ones. I will use a dc-dc isolated converter in another speaker build.
I also bought 4 of those pam8403 amplifier
With potentiometer...
It surely is powerful😉...
You're awesome
By the way
I planning to buy a pam8403 5w bluetooth amplifier
And I only have 2× 4w speaker ...what should I put something to avoid blowing my speaker...🤗🤗🤗...I'll be happy If you'll reply.....please....😊😊😊
hi. you can decrease the input audio signal with some resistors. or you can add a resistor in series with the speaker drivers 4.7ohm 5W will probably work.
Thank you very much...
I'll try it😊
Very good Sorin! Do You find a simple solution to prevent the ground loop? Thank you for sharing this video!
hi. you can use them with a different charger or a powerbank. or you can add a ground loop isolator.
What if I don't have the wire for GND connection on 3.5mm jack. Is there any workaround? Without this GND connection, speakers are making buzzing sound.
it will not work without the GND wire. find another 3.5mm jack with all 3 wires.
Great work man. Thumbs up
You are great bro. you solved my question. love from india. Now I am going to make this. Again Thanks to you.
Question: Is it possible or convenient to use two usb connectors in order to double the ammount of vatts received from a single 5V USB port? Would it really help to increase the power output to get a higher volume?
hi. for this amplifier it's recommended to use a power supply with 5V (max 5.2V) and 1A. most PCs USB ports have 0.5A and some have a voltage lower than 5V. that will work too. but there's no need to connect 2 USBs outputs, you will have the same output current.
Love this. Great Video!
I have connected this Bluetooth module chip with 8403. I have connected only 2 speakers 3w. When i am increasing volume the Bluetooth module restarts. Why it is happening like this?
Nice soldering iron! Can you give me the link?
I bought it from a local store, I can't find it online.
The amp circuit has 3 watts per channel output..but you added two speakers on both channels..
Will it not overload amp?? Two parallel speaker reduces the total resistance to 4 ohm but increase the watt by double..
hi. that's not a problem. it's recommended to use speaker drivers a bit more powerful than the amplifier, so the speakers will not be pushed to the limit.
Your very intelligent 👌👌
brother i have 2 10w 6ohm speakers.does this amplifier suitable for my speaker?
Does ac supply will be OK with Pam8403
no
I liked this video..
I have a request can you make content for Arduino (Leonardo that is what I have) again. So the plan looks like a USB portable speaker.
Because I want to learn and apply to my DIY controller with Speaker function via Arduino
Frumos... nu folosesti crossovers? cutiile le calculezi sau la bunul simt?
salut. am sa folosesc la boxe mai mari. in clipul acesta am vrut sa fac cele mai mici si ieftine boxe, care se aud mai bine decat altele noi, care costa la fel sau chiar mai mult. daca am fisa tehnica a difuzorului, de obicei calculez cutiile.
Are you sure about tha IC, means 8403 can take this much load? Be honest.. It will get any damage or not? Please suggest me!
what load are you referring to? the speaker drivers? then yes, it works fine.
Hi Sorin, another great video. Looks like I will be customising my parcel shelf in my car. As the power consumption is relatively low do you think you could make a base box using a slightly bigger speaker from your speaker stash?
So what is next of the agenda?
•powering them by 18650 lithium batteries.
•adding a Bluetooth chip for portability.
:)) You got me! I really like this PAM8403 amplifier and I will use it in other future videos. I will also make a portable bluetooth speaker. I have some original ideas, but I also want to make my version of these common "diy speaker/charger/PSU" videos, that you can find on youtube, to see if I can make them better :) Thanks for your support!
Awesome I can't wait. 👍
So beautifully you work bro. Keep it up 😘😘
Hi Sorin! I have a doubt: where did you connect the led?
hi. the LED (in series with a resistor) is connected on the amplifier board supply voltage input.
@@Sorin_DIY Thanks man! Keep up the good work!!
Marvellous video, great channel! Power to you, Sorin - liked and subscribed.
Where should i connect the audio jack? is it present in the diagram?
hi. the audio jack is connected to the volume potentiometer. you can watch my video with 2x15W portable speaker for more info, also check the schematics in the description of that video.
Not getting low frequency sound with 3.7v lithium battery when i was using with powerbank it working absolute fine
this amplifier needs to be powered with 5V. a single lithium cell has a lower voltage. if you want to use a cell, you need to add a step up converter to increase the voltage to 5V.
@@Sorin_DIY i have use mobile charger to supply power 5v 1A then that chip is getting heatup and Auto shut down
Sorin!
I have not found a 10v 1000mf capacitor.
I have 16v and 6.3v, which one should I use?
Thank!
16V
What is that tool which you used for tightening the potentiometer nut
flat-nose pliers
@@Sorin_DIY thanks sir
One question and will the amplifier support 4 speakers on a single audio output????
yes, but only if the combined impedance of the speaker drivers is not below 4ohms per channel.
Is it possible if the impedance is higher? In only a single audio output ???my amplifier is pam 8403
Difuzoare de 3ohmi este ok ?Cu o rezistenta de 1ohm pe fiecare difuzor se poate aduce l 4ohmi pentru acest amplificator?
Da, e ok, dar se aude putin mai incet.
Excellent video!!! Clear, short yet accurate and right to the point explanation !!! With one video I have learned everything I needed to know about speakers. I have a question though, with the same power (in this case 3W+3W), can you make them somehow even a little louder by using different pot or different amplifier for instance, without compromising quality of the sound ??? I'm asking 'cos I am currently working on a similar project, but speakers will be located further from the source? Great respect dude!
hi. thanks for watching, the amplifier cannot be modified, to be more powerful. but in the pam8403 datasheet is mentioned that it can be powered with max 5.5V. this way it can deliver 3.2W per channel with 4ohms speakers. so you can try to increase the voltage to 5.5V. the only alternative is to use a more powerful amplifier.
Ok. Thanks for that. But are there any more powerful amplifiers? Could you recommend something? It will go to a laptop.
it depends on what power supply you want to give it. the laptop USB port can deliver 5V at 0.5A. if you want to use the USB as the power supply for the audio amplifier, the pam8403 is the best choice. if you want to use a separate power supply for your amp, you can use any amp you want.
Thanks a million, mate!
Can the led hook up on the plus and minus on the board
you need a resistor of a few hundreds of ohms, in series with the LED.
Sorin - DIY Electrical Nerd thank you
Bro i have an old car cassette player (not cd/dvd). How can i use it with Bluetooth module kit plz help me
I don't think it's a good idea to use an old cassette player, the sound quality will be very poor.
HI Sorin,
Awesome video.
Question.. I am a teacher and I would like to make this for my electronics class with my students.
I am planning on building this with a 3.7V battery with a step up module to 5V.. running a PAM 8403 bluetooth module board. with 5-10w 4 OHM Speakers.
What size Capacitor should I use for the Wattage and Volts?
And also, do I need the Potentiometer? why cant I just use the phone to turn volume up and down?
Look forward to your response.
Thanks
Tim
hi. I suggest you use a 4700uF capacitor at 10V. if the amplifier board has a bluetooth module included, there is no need for a volume potentiometer. but if it's a simple amplifier board with a stereo jack input cable, you need a volume potentiometer, to adjust the audio level coming from the laptop/phone or any other device. the potentiometer also reduces the background noise, when there is no music, or when you listen at a low volume.
@@Sorin_DIY
Thanks for the reply mate.
Watching all the way from Australia.
Would you mind explaining to me how you found that 4700uF would be a good choice? and what did you mean by 'at 10V'? the circuit is only running at 5V?
Thanks in advance.
Tim
I've modified and made a lot of transformers and power supplies so far. for big loads, 4700uF it's the minimum value capacitor to keep the voltage stable. of course, in most cases, a bigger value capacitor is better, but the capacitor will be bigger too. for a portable speaker enclosure, the internal volume is also important. big components will waste too much of the internal volume. so for a portable speaker box, 4700uF will be efficient enough and also not to big. the capacitor rated voltage must be bigger than the circuit voltage. you can use a 6.3V capacitor, but it's too close to the limit. you must be careful with the step up converter, not to get too close to 6V, or you will pop the capacitor. the next rated voltage value is 10V.
@@Sorin_DIY Thanks for the reply. I really appreciate it. Keep up the great work. Thanks for educating.
Hey bro i have 4 ohm subwoofer. It has more base and when increase volume it gives me Cracked and distorted sound pls twl me how to reduce some base.. Or clean that sound
did you try with a more powerful USB charger? minimum 2A. if the bass is still distorted, you can reduce it with a capacitor connected in series with the speaker driver. you need a non polarized capacitor with a capacitance between 100 micro farads (more bass) and 10 micro farads (less bass). if you don't find a non polarized capacitor, you can use 2 polarized capacitors (they are much cheaper and easier to find) in series to make a non polarized capacitor. but you need to connect the 2 capacitors in series with a common negative. and the capacitance will be halved. for ex 47microF + 47microF = non polarized 23.5microF capacitor.
Sorin - DIY Electrical Nerd thnx man u r a genius 💓
Sir ,i have 2 speaker of 5w and 8ohm and other 2 speaker of 30w and 12ohm ,does it work with this diagram?
no, you cannot connect them in parallel. they must all be of the same type.
@@Sorin_DIY thank you sir
All the work was done in perfect squatting position.
You can turn this into a Bluetooth speaker too - just add a cheap Bluetooth receiver board and a ground loop insulator
Hi sorin the tiny degital pam8403 amp module does it produce surround sound while playing music?
hi. no, it's just a simple stereo amplifier board. you can use minimum 2 boards with 4 channels to produce surround sound.
I have 2 speaker 4 ohm 5watt will it be possible to run smoothly for both channel? it is recommend to use 3watt, but I don't have 3 watt speaker the only speaker what I have is 4 ohm 5watt I highly doubt that..i order pam8403 in Amazon but the product hasn't arrive yet I would like to know before I build please tell me sorin.
it will probably work. it depends on the quality of the speaker drivers. it's recommended that the speaker drivers have a higher rated power than the amplifier.
Hi sound quality is nice but it doesn't produce bass.. I would prefer 12v amplifier to produce bass
Thank you, my friend! It is as useful as i couldn't even imagine. All i needed to know. But i have a question: would my PAM8403 sound worst with 4Ohm 25W speakers than with 4Ohm 5W speakers?
hi. it depends on the speaker drivers build quality. theoretically the 25W speaker should be better, but if it's cheaply made, it will sound worst than the 5W speaker. I can't give you a direct answer, because I can't see the speaker drivers. my suggestion is to use the ones that have the better build quality.
Power ratings don't really matter much with this amp. The rated output is 3W per channel, so choose the better sounding one.
My pam 8403 is making buzzing sound what to do please tell
you are probably powering the amplifier board with the same power source as the audio device and you are getting a ground loop noise. you need to use different power supplies for the audio device and the amplifier board. or use a DC-DC isolated converter, or a ground loop noise isolator.
Hi do I need to use the capacitors? Because I have 4 speakers and i mistakenly bought a 16v capacito...
you can use the 16v capacitor
Ok thank you:)
Sir it's a nice Project. If u make some 2.1 sounds system in future then we will be very thankful 😊💕
i am using the same amp with 2×3watt speakers 4ohms. but the sound distorts at the max volume. is this due to the amp or the speakers..?
hi. it depends on what speaker drivers did you use. I think the speaker drivers are too small for this amplifier board. you also need a good power supply, try it with a different 5V powerbank.
Bravo mah ! 👍😉😁
Use DC-DC isolator to stop the buzzing sound
You are m'y source of inspiration
Very simple and clear. Thanks.
Which drill machine are you using?
Did you used any high Pass filter in the input?
not for these speakers. I will use one in the future with more complex audio systems.
One channel of amp how much ohms is needed 4 ohms right + 4 ohms left??? P
each channel works with 4 to 8 ohm speaker drivers. if you connect in parallel 2 speaker drivers with 8 ohm each, together they will measure 4 ohms.
Is better if u use pasive radiator for speaker / e mai bine sa folosesti membrane pasive pt boxe
I was planing to make pc speakers too but i dont have a jigsaw
Can I use 10+10 watts speaker with this tiny amplifier?
yes
@@Sorin_DIY thanks bro its working perfectly just tell me one thing . when I increase volume then bass automatically increase so what can I use for increase bass?
Sorry what can I use for decrease bass
you can add a non polarized electrolytic capacitor in series with each speaker driver. the value should be between 10uF (almost no bass) and 100uF (almost full bass) rated at 16V or more. if you don't have a non polarized capacitor, you can use 2 polarized capacitors in series, like I did in my home made speaker driver video.
@@Sorin_DIY OK thanks bro
Hi Sorin, thanks for sharing, this video will help, I'm going to make a bluetooth speaker
That amp board have a weird noise and hum i have two of that and thats what i have encoutered so far
Very nice. can you make a sound bar for tv
Thanks. I will make more speakers in the future, probably a sound bar also.
este suficient sunetul pentru o camera :D foarte buna lucrarea...am si eu doua difuzoare ca ale tale...o sa fac si eu ceva de genul.
Lot of work...so im not doing, u do work thumbs up 👍👍
I used the phone charger but the background sound stays the same
that's because the charger is not isolated from ground loop, like transformers. you need an isolated converter to power the amplifier. or a ground loop isolator on the audio input.
@@Sorin_DIY could you please link me an isolated converter as an example?
www.aliexpress.com/item/4000006946312.html?spm=a2g0o.productlist.0.0.203c1849fvAf2W&algo_pvid=6775c01c-cf25-405d-88cf-51cad6ada85e&algo_expid=6775c01c-cf25-405d-88cf-51cad6ada85e-12&btsid=0bb0623316052579906571209eb99d&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
Thank you Sorin, that solution of the isolated converter worked.
Salut Sorin! Poti sa-mi spui cum se numeste chestia acea pe care o folosesti sa dai o gaura mare in lemn cu bormasina?
Edit:Scuze ca iti spun deabea acum, spuneam mai devreme daca nu ti-as fi gasit canalul abea ieri :(
salut. este un - set freze circulare lemn. l-am luat din dedeman.
How much ohms is suitable for this amplifier in which ohms it will give best output
the amplifier works with 4, 6 and 8 ohm speaker drivers. 4 ohm speakers will give the loudest sound, but at high volume the sound quality will decrease. 4 ohm speakers will draw more current, if you speaker is portable, the battery will last less time. with 8 ohm speakers the max sound level will be lower. the sound quality will be better at max volume and the battery will last longer. I suggest 6 or 8 ohm speaker drivers.
Sorin - DIY Electrical Nerd i m not gonna use betterry i will use 5v charger.. So can i go for 6ohm?? Or should I stick to 4 ohm again
I suggest 6 ohm speakers.
i am facing ground loop prob , what to do? need your help?
hi. you need a dc-dc 5V isolated converter on the supply voltage. or a ground loop isolator noise filter on the audio input. or a separate power supply.
Sir can u please tell me that hows the sound quality of pam8403
hi. the sound quality is very good, considering it only has 2x 3W audio output. you just need to give it some good quality small speaker drivers.
If there is 10w speaker ,then what to do ?
muy bueno el canal, gracias por compartir estas genialidades, saludos desde Argentina.
Can i attache mini subwoofer into this 8403??
yes, but only if it's a passive subwoofer.