This way of testing without the passive cooling would fry any amplifier, no matter the quality or brand. The aluminum body and thermal compound is there for a reason...
Opa...aqui tive que ligar o sub na saída de um falante, pois não sai som se eu ligar ele na saída do sub...pq será? Detalhe: só liguei o sub no amplificador. Não liguei outra caixa no L e nem no R. Só quero usar este amplificador pra sub, pois o som sai direto da TV.
@cybernaab so the best way is to install a speaker protection circuit. Most of them have a power on delay that avoid that loud POP that can do harm to your speakers.
@@als-techreview yeah, but your speakers are in parallel getting out of superbass output, this makes the equivalent resistance drop to 2 ohms and thats out of amp range
Exiled in the Path of Exile Can you explain better this concept? I’m about to buy one of these mini amp (with 2 home theater rear speakers) and the subwoofer from the dame HT.
@@carlosmedinalara1918 hi, u know that every speaker has some internal resistence, like 8ohms 4ohms. Resistivity laws: you can conect your speakers in Two ways: Parallel And series. Parallel: the equivalent resistance Will Drop ex: 4ohms And 4ohms Will Drop to 2 ohms Series: 4 And 4 ohms Will get to 8ohms. If u make the wrong association u can endup with a too low resistance, outof the amp range, this is harmfull for the amp, or u could endup with too much resistance, that is harmfull as Well, always know your system resistance And your amp range, they have to match! This is ohm's law resistor fundamentals I hope I could help! And dont buy this lp-838 its crap, save for a better one
I stop wasting time with these pathetic mini amps. The thought of their compact size seemed appealing at first, for a small bedroom stereo. But I was very disappointed in my Lepy and Lvpin LP-838 units. I suspect the Lepai and Elegiant equivalents are the same shit. I finally found happiness with the Douk audio Nobsound NS-20G I bought from Aliexpress. Much better, more capable unit the the Lepai units. For the size of a pack of cigarettes, I can rock my bedroom with only 2 small bookshelf speakers, a pair of old, Radio Shack Realistic Minimus 7 speakers. I used the same speakers with the Lepy, and the Lvpin, and either one cound barely drive them. The Nobsound with the two speakers spanks the Lepy with the same 2 speakers AND a JVC subwoofer. I thought about taking one of my Lepy units apart, and possibly modifying it, but probably not worth the time or effort. My next quest will be trying one of those bluetooth boards that come out of China with the 3116 chip, to see how they fare instead.
Don't really know.. usualy don't do that.. But this time it is 🤭 or i have driven it to much.. And without cooling it just fail.. Or is not enough powerful to drive those speakers.. Bo.. 🤷♂️ ☺️
@@mustafakocaoglu8888 i wouldnt recommend it but do it at your own risk, this AMPLIFIER is design from 12v to 18v so the factors above that range might be harmful, so wouldnt recommend you can try but beware.
@@bawersauriorexrex9240 Es que la carcasa de aluminio de ese amplificador sirve para disipar el calor de los chips, por eso los chips amplificadores tienen una pasta térmica blanca para transmitir mejor el calor y mantener una temperatura adecuada, eso es lo que él explica en el video, al poner a trabajar sin la carcasa me imagino que los chips se colocaron peor que una plancha y fallaron, en 4:32 señala los chips.
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This way of testing without the passive cooling would fry any amplifier, no matter the quality or brand.
The aluminum body and thermal compound is there for a reason...
The chips on the bottom are the amp ic, the ones on top are used to control tone.
Does this have 2 tripath toa2020 chips
Mas sem aqueles parafusos lá. Baixo ele não funciona.. o meu só sai som de um lado 😭
Opa...aqui tive que ligar o sub na saída de um falante, pois não sai som se eu ligar ele na saída do sub...pq será? Detalhe: só liguei o sub no amplificador. Não liguei outra caixa no L e nem no R. Só quero usar este amplificador pra sub, pois o som sai direto da TV.
Bisa di upgrade ga biar nambah mantab bas nya
What are the IC used ?
Looks like from Sanyo
4558 op amplifier, used to control the bass, treble. Power amplifier ic is at the bottom
A question: Would you recommend the Q100 amplifier to only power a subwoofer?
It very depnd how you intend to connect it..
U can use any amp for a sub just use one channel. But you probably want a crossover before that to send only the bass frequencies
Please tell me how much this stereo
Me llama la atención que la electrónica sea tan sencilla ¿Eso es malo?
If you power on the amplifier do you hear a pop out of the speakers ?
that should happen actually
ive tested many amplifiers and most ones do that.
@cybernaab so the best way is to install a speaker protection circuit.
Most of them have a power on delay that avoid that loud POP that can do harm to your speakers.
Can check the preamp stage values an fix with some filters
Mine played less than 5min, power still on but nomore sound.
what is the IC amplifier?
My LP 838 has two inside:
Phillips TDA7057AQ and Toshiba TA727DP
3:23 u know that this only happened because u probably put thoses speakers lower than 4 Ohms
Left and right are 6 Ohm sub is 4 Ohm..
@@als-techreview yeah, but your speakers are in parallel getting out of superbass output, this makes the equivalent resistance drop to 2 ohms and thats out of amp range
Exiled in the Path of Exile Can you explain better this concept? I’m about to buy one of these mini amp (with 2 home theater rear speakers) and the subwoofer from the dame HT.
@@carlosmedinalara1918 hi, u know that every speaker has some internal resistence, like 8ohms 4ohms. Resistivity laws: you can conect your speakers in Two ways: Parallel And series.
Parallel: the equivalent resistance Will Drop ex: 4ohms And 4ohms Will Drop to 2 ohms
Series: 4 And 4 ohms Will get to 8ohms.
If u make the wrong association u can endup with a too low resistance, outof the amp range, this is harmfull for the amp, or u could endup with too much resistance, that is harmfull as Well, always know your system resistance And your amp range, they have to match!
This is ohm's law resistor fundamentals
I hope I could help! And dont buy this lp-838 its crap, save for a better one
I stop wasting time with these pathetic mini amps. The thought of their compact size seemed appealing at first, for a small bedroom stereo. But I was very disappointed in my Lepy and Lvpin LP-838 units. I suspect the Lepai and Elegiant equivalents are the same shit. I finally found happiness with the Douk audio Nobsound NS-20G I bought from Aliexpress. Much better, more capable unit the the Lepai units. For the size of a pack of cigarettes, I can rock my bedroom with only 2 small bookshelf speakers, a pair of old, Radio Shack Realistic Minimus 7 speakers. I used the same speakers with the Lepy, and the Lvpin, and either one cound barely drive them. The Nobsound with the two speakers spanks the Lepy with the same 2 speakers AND a JVC subwoofer. I thought about taking one of my Lepy units apart, and possibly modifying it, but probably not worth the time or effort. My next quest will be trying one of those bluetooth boards that come out of China with the 3116 chip, to see how they fare instead.
Nice! I have a lp-2020a
How did you connect it to the battery help please
Nice
what causes the sound to break haha..haha my amply lvpin383 it's the same problem
Don't really know.. usualy don't do that.. But this time it is 🤭 or i have driven it to much.. And without cooling it just fail.. Or is not enough powerful to drive those speakers.. Bo.. 🤷♂️ ☺️
Lo dejaste sin disipador de calor y lo quemó.
La carcasa es el disipador
Tengo uno igual y de momento dejo de salir audio a los medios solo el subwoofer funciona! Me podrías ayudar?
@@LosCarpinteros1 yo igual tengo uno , pero una de las salidas no suena 😭😭
@@LosCarpinteros1 el circuito amplificador esta roto
@@DianKOficial el circuito amplificador tiene dos entradas y dos salidas amplificadas..el circuito no da en uno de salida hay que cambiarlo
Lol I saw it coming when I saw the bottom chips with heatsink compound that would have sent heat to the case... but no case
this sounds like shit with 12v, i use 16v 4A and sound close to a high budget amplifier.
Can I use it with 19v 4,74a?
@@mustafakocaoglu8888 i wouldnt recommend it but do it at your own risk, this AMPLIFIER is design from 12v to 18v so the factors above that range might be harmful, so wouldnt recommend you can try but beware.
@@ayo4646 thanks for your reply 👍😊
Como pode funcionar tão bem com tão poucos componentes eletrônicos 😲
También me pregunto eso
@@carlosrobertoramirez8377el poder se lo da los dos chip que tiene abajo
2x10 watts
Dude its for 8ohms speaker amplifier not like your speaker
Funcionando sin disipador XD jajaja el susto
Osea que sucedió amigo me podrías explicar?
@@bawersauriorexrex9240 Es que la carcasa de aluminio de ese amplificador sirve para disipar el calor de los chips, por eso los chips amplificadores tienen una pasta térmica blanca para transmitir mejor el calor y mantener una temperatura adecuada, eso es lo que él explica en el video, al poner a trabajar sin la carcasa me imagino que los chips se colocaron peor que una plancha y fallaron, en 4:32 señala los chips.
2x10w +1x8w overprice for 15$ it's too much
🤣😂😅 superb amplifier !
LA 4440 ic use in amplifier 😂
the content is small
LOL
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