DIY - USB Mini Speaker System - PAM8403

The main component is the PAM8403 digital amplifier. It’s very small and can be powered with an USB cable. It can deliver three watts per channel and it has a very low price, especially if you buy more pieces at once. It works with 4ohms and 8ohms speaker drivers.
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PAM8403 Amplifier Board: s.click.aliexpress.com/e/_De4...
Speakers 2" 3W: s.click.aliexpress.com/e/_Deg...
50K dual potentiometer: s.click.aliexpress.com/e/_Dnk...
Potentiometer knobs silver/black: s.click.aliexpress.com/e/_Dn3...
Small switch 10x15mm: s.click.aliexpress.com/e/_DnN...
volume potentiometer schematic: i.imgur.com/Yj3sOqr.jpg
PAM8403 speaker schematic: i.imgur.com/LhEsWEq.jpg
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[@strugglingparodox5709]

Excellent build,, I bet they do sound much better in person. I love these little PAM8403s.

[@PhilDeGuzman]

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!

[@yjtechnical4700]

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.

[@joakimjocka8022]

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

[@jhliton6755]

Great description of whole project also neat n clear with comparison.

[@jitan7412]

Very neat work, well explained and audible illustration.Thumbs up

[@markhozz115]

you're instructions, you're work, are really excellent sir, i really like it, thanks for sharing you're knowledge in some electronics stuff.. :)

[@rm709]

Just found your channel and I really like your style! Subbed!

[@vengads1719]

Really a superb book shelf speakers you have made.

[@housewirestv]

absolutely amazing video. Keep it up dude!

[@bunsoft2]

Bravo Sorin. A ieşit fain treaba :-)

[@AkshatAjeya]

Your projects are interesting Sorin. Subscribed.

[@hedemegmondom]

Great idea to use laminate floorboard for this. I have them laying around as well.

[@TheDradge]

Great video and nice humor thrown in the build.

[@BinhoSouzaOlinda]

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 !!!

[@ayushmanbhavya7510]

I like your finishings and designs

[@Rayu25Demon]

finally,a smart someone isn't using inches to measure. thanks for your info, you video is amazing

[@pyotrleflegin7255]

Marvellous video, great channel! Power to you, Sorin - liked and subscribed.

[@ChargedCMOS]

I'm quite sure the sponge makes a difference- it helps smooth out the hollow sound and it lowers the tuning frequency.

[@Adrian-lb7kh]

Sos un genio, uso tus videos para practicar inglés y aprender sobre ciertos amplificadores... saludos desde argentina!

[@GayanKanishka]

Great work man. Thumbs up

[@moti_vati0n]

wow, this is a real MASTERPIECE...

[@FabRecUp]

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 ! 😉

[@Sorin_DIY]

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.

[@FabRecUp]

Sorin - DIY Electrical Nerd Nice ! i'm waiting for it !!

[@indiandiyboyby-kanishk76]

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.

[@creativekristan8386]

I got mine today and its really powerful and i love it

[@subhrajithalder3045]

So beautifully you work bro. Keep it up 😘😘

[@docholliday6296]

Love this. Great Video!

[@swapnilkhokale6076]

You are great bro. you solved my question. love from india. Now I am going to make this. Again Thanks to you.

[@yasserghozy6815]

You are m'y source of inspiration

[@70630515]

Hi Sorin, thanks for sharing, this video will help, I'm going to make a bluetooth speaker

[@noorulamin3044]

Very simple and clear. Thanks.

[@Me11oIngenuity]

Nice work!

[@krishna_mahaur]

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?

[@anonim20121]

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.

[@Flecoide]

muy bueno el canal, gracias por compartir estas genialidades, saludos desde Argentina.

[@jeramzPC]

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

[@Sorin_DIY]

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.

[@joych100]

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.

[@Sorin_DIY]

it will not work without the GND wire. find another 3.5mm jack with all 3 wires.

[@lmofficial3269]

your project are awesome.

[@aju5405]

brother i have 2 10w 6ohm speakers.does this amplifier suitable for my speaker?

[@amitnativ5631]

Sorin, please add purchasing links for those killer vintage pliers

[@mldalex]

regarding the ground loop effect, you can use 2 1 to 1 audio Transformers to isolate the channel grounds

[@GotaSir911]

Good idea, I built a 10w speaker like this

[@RappSodic]

All the work was done in perfect squatting position.

[@ayushmanbhavya7510]

Very good speakers

[@ricardocordoba]

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?

[@Sorin_DIY]

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.

[@bombbingzone960]

Nice video bro

[@Foma_Kinyaev]

Sorin! I have not found a 10v 1000mf capacitor. I have 16v and 6.3v, which one should I use? Thank!

[@Sorin_DIY]

16V

[@Gemini-1]

That was nice Sir.

[@krishna_mahaur]

Bro i have an old car cassette player (not cd/dvd). How can i use it with Bluetooth module kit plz help me

[@Sorin_DIY]

I don't think it's a good idea to use an old cassette player, the sound quality will be very poor.

[@hardikkumar4964]

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..?

[@Sorin_DIY]

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.

[@jabirsaifi4797]

If there is 10w speaker ,then what to do ?

[@thecandidemrsinus8169]

nice build

[@sergiotequidalozoya3875]

You should have like 300,000 subscribers

[@komangsanjaya4855]

Where should i connect the audio jack? is it present in the diagram?

[@Sorin_DIY]

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.

[@nekomeong6904]

This project i want to do. Thx dude...

[@shivnaresh1468]

Nice project

[@tanjianuz]

Bravo mah ! 👍😉😁

[@lucareghellin]

Very good Sorin! Do You find a simple solution to prevent the ground loop? Thank you for sharing this video!

[@Sorin_DIY]

hi. you can use them with a different charger or a powerbank. or you can add a ground loop isolator.

[@djcolmere]

wow cool comparaison :)

[@NWGR]

Great job dude. :-)

[@johnibbertson2960]

great vid and well made, will it work just mono speaker?thanks

[@Sorin_DIY]

yes

[@chandachoudhary3189]

My pam 8403 is making buzzing sound what to do please tell

[@Sorin_DIY]

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.

[@barneymiller844]

Great job

[@marianb.5960]

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?

[@Sorin_DIY]

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.

[@balazsrako9528]

Power ratings don't really matter much with this amp. The rated output is 3W per channel, so choose the better sounding one.

[@aswinkrishna5345]

Sorin, what if i make it with 2×(8 Ohm , .5W) speaker . One for left and other one for right?

[@Sorin_DIY]

it's ok, but it will be a little less powerful.

[@aswinkrishna5345]

@@Sorin_DIY Thanks buddy

[@doctorn3m024]

I found your Channel and feeling like found new earth 😘😘

[@IvanF3_]

very inspiring. thanks!

[@dibyamartandasamanta583]

Which drill machine are you using?

[@nisheshfernando4352]

Hi do I need to use the capacitors? Because I have 4 speakers and i mistakenly bought a 16v capacito...

[@Sorin_DIY]

you can use the 16v capacitor

[@nisheshfernando4352]

Ok thank you:)

[@tombez3638]

Really enjoyed the project. What's next? Maybe bluetooth sound bar...

[@Sorin_DIY]

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.

[@GENERALWA5TE]

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.

[@Sorin_DIY]

:)) 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!

[@GENERALWA5TE]

Awesome I can't wait. 👍

[@pushkarraj6297]

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..

[@Sorin_DIY]

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.

[@krishna_mahaur]

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

[@Sorin_DIY]

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.

[@krishna_mahaur]

Sorin - DIY Electrical Nerd thnx man u r a genius 💓

[@sksdy9444]

Lot of work...so im not doing, u do work thumbs up 👍👍

[@praveenkumar8126]

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!

[@Sorin_DIY]

what load are you referring to? the speaker drivers? then yes, it works fine.

[@creatinggaming7067]

Really I like it😍

[@zte2d2]

esti rooooomannn de al nostru :)

[@Asraful_x]

Sir it's a nice Project. If u make some 2.1 sounds system in future then we will be very thankful 😊💕

[@dj_sorra8605]

Difuzoare de 3ohmi este ok ?Cu o rezistenta de 1ohm pe fiecare difuzor se poate aduce l 4ohmi pentru acest amplificator?

[@Sorin_DIY]

Da, e ok, dar se aude putin mai incet.

[@sknausar786]

i am facing ground loop prob , what to do? need your help?

[@Sorin_DIY]

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.

[@pratikchafe3147]

Not getting low frequency sound with 3.7v lithium battery when i was using with powerbank it working absolute fine

[@Sorin_DIY]

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.

[@pratikchafe3147]

@@Sorin_DIY i have use mobile charger to supply power 5v 1A then that chip is getting heatup and Auto shut down

[@savimuk.8j122]

Does ac supply will be OK with Pam8403

[@Sorin_DIY]

no

[@videomaker811]

Nice.. keep it up bro.

[@sarojdevi9870]

Sir can u please tell me that hows the sound quality of pam8403

[@Sorin_DIY]

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.

[@mememelayuboleh2618]

Sir ,i have 2 speaker of 5w and 8ohm and other 2 speaker of 30w and 12ohm ,does it work with this diagram?

[@Sorin_DIY]

no, you cannot connect them in parallel. they must all be of the same type.

[@mememelayuboleh2618]

@@Sorin_DIY thank you sir

[@mohan.kuppan5894]

NICE JOB

[@ahmedshedeed6688]

Very nice. can you make a sound bar for tv

[@Sorin_DIY]

Thanks. I will make more speakers in the future, probably a sound bar also.

[@scellyyt]

Îmi place foarte mult :D

[@wintechblog6066]

Buna,am o intrebare, de exemplu daca as face boxele portabile ( cu acumulatori Li-ion) s-ar auzii pe fundal sunet de impamintare?

[@Sorin_DIY]

salut. daca ii pui baterie, nu se mai aude acel bazait.

[@wintechblog6066]

@@Sorin_DIY MUltumesc!

[@Synthematix]

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!

[@esbro69s]

Did you used any high Pass filter in the input?

[@Sorin_DIY]

not for these speakers. I will use one in the future with more complex audio systems.

[@steavekamei2013]

Hi sorin the tiny degital pam8403 amp module does it produce surround sound while playing music?

[@Sorin_DIY]

hi. no, it's just a simple stereo amplifier board. you can use minimum 2 boards with 4 channels to produce surround sound.

[@steavekamei2013]

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.

[@Sorin_DIY]

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.

[@steavekamei2013]

Hi sound quality is nice but it doesn't produce bass.. I would prefer 12v amplifier to produce bass

[@skali5834]

Very nice

[@jerryohhh]

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

[@theneufonline]

Can i use 1000 uF 16V instead of 1000uF 10V? Capicitor

[@Sorin_DIY]

yes

[@kuyaroy6502]

3w of power is based on combined channels. So the actual wattage is 1.5w per channel.

[@floritobentillo6941]

You could use isolated 5V power converter to eliminate that boozing sounds.

[@Sorin_DIY]

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.

[@criper80]

Frumos... nu folosesti crossovers? cutiile le calculezi sau la bunul simt?

[@Sorin_DIY]

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.

[@sandelsandel5830]

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 :(

[@Sorin_DIY]

salut. este un - set freze circulare lemn. l-am luat din dedeman.

[@indreke5683]

What is that tool which you used for tightening the potentiometer nut

[@Sorin_DIY]

flat-nose pliers

[@indreke5683]

@@Sorin_DIY thanks sir