Hello I have a question. What is this part marked 811 on the board and AQFH written on it? on PCB Shui yuan Audio
next to Rest/Mute
next to Rest/Mute
Hello, i have one question. Could i turn on the tpa3255 shui yuan board without speakers connected? Will this blow the capacitor/amp?
Hi jeff5may,
I've been looking exactly for these components you show in the photo, the TPA3255-based amp using Shui Yuan and this power source, do you think they are of good quality or it's better to buy the newest models and a litle more expensive and allready assembled amplifiers from Fosi Audio or Aiyma?
I have a question. I am adding a Tube preamp to my build its a class A tube preamp running 5725 tubes. ripped it out of aFX Audio Tube 02 pro. All discrete no opamps etc. Do I need to cosider any additional shielding? I ran signal wires underneath and solderedthe under the board and kepts the installed jacks should I change my mind. It runs poff 12v dc. I am going to use a linear regulator and drop voltage to 12 from 48 or I may just install a dc barell jack and power it seperately. I have a 300 watt Meanwell EPP 300-48 cageless installed, the TPA3255 board is a Dual chip board essentially Dual mono with shared supply. Heres pictures.
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Did aníones could compare the sound quality of the Shui Yuan Audio TPA3255 original amplifier board with this 2023 version model available in Aliexpress?:
DC19-50V TPA3255 Audiophile HIFI Digital Audio Amplifier Board Power Supply 300W+300W High Power 2.0 Dual Channel Stereo Module
It has a lot of sales and good feedback.
Can it be superior to the Shui Yuan Audio TPA3255 original or does it have inferior quality components?
DC19-50V TPA3255 Audiophile HIFI Digital Audio Amplifier Board Power Supply 300W+300W High Power 2.0 Dual Channel Stereo Module
It has a lot of sales and good feedback.
Can it be superior to the Shui Yuan Audio TPA3255 original or does it have inferior quality components?
Attachments
Is there a reason to not replace the 10uf electrolytic caps before and after the op amps?
Wouldn't good film caps be preferable?
Wouldn't good film caps be preferable?
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Building thread with modifications :
Here is the building thread of my tpa3255 amplifier.
The board is bought on Amazon and the power brick is 36V 6A . The case is bought at Audiophonics, France.
Some modifications gonna be made, but this it the result so far.
The board is bought on Amazon and the power brick is 36V 6A . The case is bought at Audiophonics, France.
Some modifications gonna be made, but this it the result so far.
Hi, I wonder if any of you guys have come across this problem I'm having, or have any suggestions I could work with the next time I have a look at it.
I have 2 Shui Yuan TPA3255 boards being fed by 2 400 Watt SMPSs. When I switch the amplifier on, randomly, one or other of the boards does not start up, or starts momentarily then shuts down with fault light. Clarification, it happens every time it's switched on, but could be either of the boards or both. I tried offsetting the start ups by soft starting one of them with a delay board, but that didn't work. I then used the same board to soft start on the primary side of SMPSs, so soft starting both modules. Success I thought, as they were now powering up ok, both red lights on every time, however after I had put everything back together, connected speaker and input source, the problem returned. It has slightly improved, as with powering up and downs few times, both modules will eventually power up correctly and all works ok.
If I disconnect the power supply to either board and just run the one board, all is ok.
I have 2 Shui Yuan TPA3255 boards being fed by 2 400 Watt SMPSs. When I switch the amplifier on, randomly, one or other of the boards does not start up, or starts momentarily then shuts down with fault light. Clarification, it happens every time it's switched on, but could be either of the boards or both. I tried offsetting the start ups by soft starting one of them with a delay board, but that didn't work. I then used the same board to soft start on the primary side of SMPSs, so soft starting both modules. Success I thought, as they were now powering up ok, both red lights on every time, however after I had put everything back together, connected speaker and input source, the problem returned. It has slightly improved, as with powering up and downs few times, both modules will eventually power up correctly and all works ok.
If I disconnect the power supply to either board and just run the one board, all is ok.
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Joined 2018
Hi CyberPit. Thanks for your reply.
Problem solved, all of my own making.
I was using a DC Protection board suitable for BTL, but as I had a couple of the special speaker relays the ones with the high and low current contacts, I replaced the original relays with them. What I eventually discovered or failed to check, was the original relays were double pole, enabling the switching of 4 poles, the ones I replaced them with, although same pins, were single poles, which meant left and right channels of the tpa3355 boards were being coupled together, hence the random non starting of one or the other. Never mind, I got there in the end, minus one board.
Probably didn't need the DC protection board anyway.
Thanks again.
Problem solved, all of my own making.
I was using a DC Protection board suitable for BTL, but as I had a couple of the special speaker relays the ones with the high and low current contacts, I replaced the original relays with them. What I eventually discovered or failed to check, was the original relays were double pole, enabling the switching of 4 poles, the ones I replaced them with, although same pins, were single poles, which meant left and right channels of the tpa3355 boards were being coupled together, hence the random non starting of one or the other. Never mind, I got there in the end, minus one board.
Probably didn't need the DC protection board anyway.
Thanks again.
Having some mod experience from my tpa3255 card , the biggest sound enhancement is no doubt switching the two dc blocking Capacitors at the input, and the four of them sitting next to the 3255 chip. I used 6 red Wima 4,7 uF after advice from Jean-Paul.
This, and using opa1612 or opa1642 instead of ne5532 makes an improvement of the sound .
In original , this card sounded slightly worse than my Hypex ncore 125 power amp. After burn in and doing the modifications above , this tpa3255 outperform the hypex amplifier soundvice by a small margin.
Recently , I tried using some more Capacitance for the power supply on the card ( + 6000 uF ) . It did not improve the sound , no difference .
This, and using opa1612 or opa1642 instead of ne5532 makes an improvement of the sound .
In original , this card sounded slightly worse than my Hypex ncore 125 power amp. After burn in and doing the modifications above , this tpa3255 outperform the hypex amplifier soundvice by a small margin.
Recently , I tried using some more Capacitance for the power supply on the card ( + 6000 uF ) . It did not improve the sound , no difference .
Here is the building thread of my tpa3255 amplifier.
The board is bought on Amazon and the power brick is 36V 6A . The case is bought at Audiophonics, France.
Some modifications gonna be made, but this it the result so far.
The board is bought on Amazon and the power brick is 36V 6A . The case is bought at Audiophonics, France.
Some modifications gonna be made, but this it the result so far.
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