"Put fucking 12 of them in" had my rolling 😂😂😂

need a bit more voltage on 2 of those amps which will fix the square wave. as it hasnt got enough of the high power rail it will just clip it because it cant create the full sine wave

@PacmanBasshead

9 ай бұрын

So the amps are operational between 8 and 26v, the rails on all sat at around 16v, the higher rail would allow a larger sine yes but i could run these at 8v and as long as i set the output to the correct level where its between the developed rail voltage then itll play a clean signal. The sine wave is then created from the audio source and injected inbetween the rails 🙂. You are right though, id be very interested to see what they do at 20+v!

As a (self-appointed) representative of TEMU, I thoroughly suggest you sell your soul more to us.

@PacmanBasshead

9 ай бұрын

Hello self appointed representative of temu, your engrish is fantastic. I shall consider your proposal. Im the meantime, thankyou for your kind words.

1st board is probably good, but may lack buffering for some inputs (unsure). 2nd board is crap, as stated, yet they've been selling them this way for years. 3rx board is probably not as good as estimated since the output inductors tend to cook on that design and the heatsink is far too small for two 100w chips. It is technically 50w + 50w + 100w, though (10%THD). They just bridge 1 chip to drive the sub, though I don't think there's any crossover/rolloff. These amps can be great and I'm using one smaller than a deck of cards as a Bluetooth amp on my mid-tower speakers, but the boards with two bridged chips claiming twice the power are suspect as some designers didn't know how to implement bridged mode properly and the boards are *never* corrected; they're just churned out so long as sells continue. Also, the heatsinks are usually too small so 1 chip is more reasonable. The power ratings are ridiculous and stated even in the datasheets at 10% THD and sellers then exaggerate that some more. No hearing person can tolerate music at 10% distortion. Some boards also have unwanted rolloff at low frequencies, so look for testing on yt or elsewhere. I recall one design where the sub channel rolled off below 100Hz while the stereo channels did not, which is obviously dumb. It's hard to know which models are good implementations of the chip datasheets and they all tend to have some hiss even with no signal, but these can be excellent values if you find one of the good boards so long as you understand that they're not going to provide the stated power cleanly and without shutting down on thermal overload after a few minutes. They're usually fine for actual listening volumes, though.

Not BAD Adam, keep making these Video's !!!

great video realy educational inspired me to install one of the 3 channel amps on my mobility scooter should rock thanks for the inspiration

I'm actually running the 2nd and 3rd ones in my trailer as my surround sound system amps. True that the 2nd one did take some fiddling but I eventually got it tuned in and putting out some clean sound. And although I didn't enroll in your giveaway I'm currently building a pair of transmission line towers with some old Pioneer 8" and other leftover "Frankenstein" mids and tweets. If I can find a decent way to record a video and you're interested I'd be happy to share the final results, just for shits and grins lol. Oh, and that 3rd one I fell in love with the second I hooked it up to a pair of Bose 301 series that a friend gifted me. Freaking POUNDS them!

Thank you David 👍

@PacmanBasshead

9 ай бұрын

I had to sit here and think 'who the hell is david' and then i was like AH YES'. Brilliant haha.

I may need to get a couple of these just for fun

Love this content!!!

@PacmanBasshead

11 күн бұрын

Loads more on the way!!

Another great video! Would be an ideal lil amp for a classic car where the driver just wants to hide a lil setup. Looking forward to the Temu #cheapotemuboombox

1:10 i acually use those for DIY speakers and they are good

Sounds like a standard Mazda Bongo (my van) MOT list

How was your scope connected? One output and ground? In that case you will see only half the output voltage of a bridged amp output

Hello Adam, I just found this video and it's great, what would you suggest for an "Sound Ordinance B-8PTD" powered subwoofer, the speaker blew and the p was removed, the max is 250 watt and I would like to replace the two for a garage stereo when tinkering

no problems with too early fuzzies/distortion ? usually a "chinese amp" that is rated 50w only gives 10 clean watts before cataclysmic distortion kicks in.

Belta... get more bought! 😁 and give us an update on everything 👍🏼

Cool

I have an app on my iPhone that is called signal generator or some such, and it just allows me to select any frequency and amplitude that I want. I would suggest trying to find an app like that for faster signal generation and it doesn’t require Wi-Fi to use.

@ThatOneGuySometime

8 күн бұрын

I should also mention that it has different wave types like sign, square, and saw-tooth.

@PacmanBasshead

7 күн бұрын

Oh thats cool! I might give that a shot!

I can’t find the last amp

When using a low power board add a capacitor from 470uf to 688uf to the 5v. It will sound better.

@PacmanBasshead

21 күн бұрын

Yeah i guess that would smooth out the supply to whatever opamp is inboard!

About the 2nd amp i have a few of them they work grate one of them is in the trash It all depends where they source the TPA. Chips from if you can find one with a real tpa amplifier chip and not a cheap clone the amp does quite well anyway did your amp pop during start up I had an issue with my ones I just added a wire on to the mute pin though a timer relay and basically shorts mute pin to ground for 5 ish seconds to stop it from poping the speakers

@PacmanBasshead

9 ай бұрын

Nah mine didnt pop on start up. It started as normal, as you say its as though there was a naff IC on the board which meant that when the inout signal distorted heavily at the rail. Good to know they are hit and miss though, still something ill avoid. Thankyou 😊

The mighty box cutter

On the last amp, one of the speakers were wired up in reverse. That's what made it sound like rubbish. To be honest, they were all ok. I'd be interested in replacing the heat sinks if I was to actually use it.

@PacmanBasshead

9 ай бұрын

Heya, i know it looks like that but it was the camera frame rate, the wires were soldered onto the speakers the same for all amps and if you look the cables into the amp are all the same way around which was correct 🙂. But yeah the fact that any of them worked was insane lol!

@MurderousMindstate

9 ай бұрын

with no baffle to separate front waves from rear waves it wouldn't matter what wiring configuration he used except maybe the tweeter but wouldn't matter much in this case. also even on the first amp he had the blue and red wires reversed on one speaker.

Wtf that is surprising!!

@PacmanBasshead

9 ай бұрын

Yeah man, shocked me!

Nice one Adam. Anymore 'Adam Eats' in the pipeline?

@PacmanBasshead

9 ай бұрын

God no haha, too mainstream. I like only being recognised at car shows. People in tesco literally used to ask be about it.

Good one I want moooore ;-) What about small cheap Chinese speakers?

@PacmanBasshead

9 ай бұрын

So what you are saying is i should make a full temu portable boom box?

@larsbr4519

9 ай бұрын

@@PacmanBasshead That would work ;-)

Run those TPA3116 based boards at 24 volts ... you're in for a surprise. Those are full fidelity Class D boards that are actually used in consumer products. It is obvious you don't understand them or know how to make them work properly.

@PacmanBasshead

9 ай бұрын

I never claimed to understand them haha. My power supply only stretches to 15.2v so i did what i could. I figured they would be used commercially

@Douglas_Blake_579

9 ай бұрын

@@PacmanBasshead Okay ... but running them undervoltage does nothing to determine their quality. The one you turfed works on 32 volts and will deliver almost 100 watts of power.

@krugthecaveman

5 ай бұрын

They sound absolutely kick ass at 24v!!

Why’s it look like the speakers were out of phase on the last amp?

@PacmanBasshead

9 ай бұрын

Camera frame rate maaaate

@b2lal

9 ай бұрын

@@PacmanBasshead nah

@ianmiles9716

9 ай бұрын

Does look like they are. But could be camera frame rate like u say. But mainly just here to comment

@PacmanBasshead

9 ай бұрын

@@ianmiles9716 i appreciate the algorithm boost

@b2lal

9 ай бұрын

@@ianmiles9716 talk of temu and you turn up….. surprise surprise

19:14 Speaker on the right was out of phase 😉

@PacmanBasshead

9 ай бұрын

Camera frame rates say othwrwise 😆

Try 24v next time

@PacmanBasshead

5 ай бұрын

Thats the plan! I need a new 24v power supply for that as mine peaks at 16v!

i have had one with bluetooth. made my own bluetooth speaker with a 3 way amp (stereo and sub) it worked perfect, until it dropped, and i broke the board

@PacmanBasshead

9 ай бұрын

Oh no way! Ive got a bluetooth board in my temu basket now lol.

Always use a filthy soldering iron for best results.

Shoping like a billionaire lololol xx

For the love of sanity, please clean that soldering iron! 😀

@PacmanBasshead

9 ай бұрын

Its got a petina 😅

Spend more and find better 👍

Everyone of the companies who use the net auction off our info. Especially that Chinese company called Apple.

@PacmanBasshead

Ай бұрын

Truth!

i would have bought some of those tiny 2 pound amps for a boombox back in my youth, but well cheap crap from china didn't really exist back then. But you may be able to get around copyright by claiming fair use. I was wondering how those reaction channels work and it seems like as long as you have an opinion on what you are playing you can somehow get around it. Say this is a shitty song with a lot of bass and you're good to go :P haven't tested it yet though

You just gotta 'love' cheap chinese shit lol Good vid btw, entertaining n that 😀

@PacmanBasshead

9 ай бұрын

Thankyou 😊. The cheap stuff comes with some hidden gems though!

@delboytrotter7902

9 ай бұрын

@@PacmanBasshead absolutely.....i've bought some pretty good stuff tbf

Temu 2 $ amp with shipping 10$😂😂

Beric Builds sent me... he said he found another soulless temu sellout... is this true? Jk m8

@PacmanBasshead

9 ай бұрын

Ive sold my soul to child labour and cheap t shirts. Might buy a house off temu.

@AutoAudioArt

9 ай бұрын

@@PacmanBasshead 🤣

Now stop messing about with crap amps and get ya bloody van done 👊🏻👊🏻👊🏻

@PacmanBasshead

9 ай бұрын

Sometimes you have to step back to step forward mate.