Could you share to everyone what is the exact problem with your module ? So we can help we need details...."not working" does not mean anything....
Hello! I have a Shui yuan amplifier with a few mods: 2x3300uF Nichicon PM, LM4562, Meanwell LRS-150-36 smps with simple FET capacitance multiplier with 29V. The sound is very, very good with the ALR Nummer 2 speakers. (4ohm) I think it's true here too that the lower supply voltage gives a softer sound. I'll try to upload a picture later. This amplifier is worth the effort because it is much better than what the price suggests.
Joez
Joez
My board is under stress test at 40volt .... with opa1656 before integration ....
Really pleasantly surprised This small card and easy to integrate perfect for multi-channel, for ordinary use the NE5534 is sufficient, it's a great deal!
Hello everybody,
I have my TPA3255, it is connected with SMSP 36VDV 400W. I tested quickly with OPA1612 OP and I did not like. I changed to the ADA4898 which I find excellent. Next step I change the 2 Nichicon condos for a higher series, I will buy 50vdc because my SMPS does not exceed 40vdc.
This is my 3rd TPA325X, it sounds for my taste. I have several other amps, at the moment it's replacing a class AB on my main chain.
I have my TPA3255, it is connected with SMSP 36VDV 400W. I tested quickly with OPA1612 OP and I did not like. I changed to the ADA4898 which I find excellent. Next step I change the 2 Nichicon condos for a higher series, I will buy 50vdc because my SMPS does not exceed 40vdc.
This is my 3rd TPA325X, it sounds for my taste. I have several other amps, at the moment it's replacing a class AB on my main chain.
Attachments
Not at all, it's rather the opposite, the 1612 lacks ventilation and openness in the mids and highs. I also have a 1632, great in the midrange and highs but it doesn't have the bass power of the 1612.
The OPA1656 would be a better choice. With the ADA4898, I find the sound well balanced and very musical.
Hi amigos,
I have tested tons of OP amps with the TPA3255, I noticed that FET-input OP amps work better with this amplifier. I particulary do love the 1656 and Muse02 (this one is particulary expansive). I found the 1612 too linear and less "lively" than the OPA1656 and Muse 02. I will give test with the OPA1692 to compare.
I have tested tons of OP amps with the TPA3255, I noticed that FET-input OP amps work better with this amplifier. I particulary do love the 1656 and Muse02 (this one is particulary expansive). I found the 1612 too linear and less "lively" than the OPA1656 and Muse 02. I will give test with the OPA1692 to compare.
Hummm yes I tested it and did not like... I found them very "colorful" compared to the 1656. But you should like it )
@vince:
Stuart is right, that was also what I was trying to tell. Change that main cap and pray. TPA3255 is a hell of an amp, don't give up. Come on where is your American spirit? Remember 1980 Olympic hockey finals...
1st of all: my main speakers are floor standing Focal Electra - should I ask someone to insure the cost of these guys for any amp's failure?
2nd: I removed "gold" capacitors and took a picture with original Nichicon caps that I bought on Mouser.
3rd: same for the opamps
4th: seems like TPA3255 IC soldered by hands and not so good. White substance feels like caulk!
Please dont hesitate to guess, which opamps are original
Attachments
Last edited:
Hi,
Thanks for sharing pictures.
It is obvious that the welds are done manually ... Regarding the thermal paste, it seems a bit messy (I imagine, however, that having disassembled the heatsink must have spread it).
Did you give a try with the new caps finally ?
I suppose if you unsoldered the Nichicon FW from the buffer it is because you had a doubt about their authenticity? And the same goes for the OP amps since you seem to replace them with the same 5532 ...
keep us informed when you have tested the module with the new assembled components to know if there is any better?
Thanks for sharing pictures.
It is obvious that the welds are done manually ... Regarding the thermal paste, it seems a bit messy (I imagine, however, that having disassembled the heatsink must have spread it).
Did you give a try with the new caps finally ?
I suppose if you unsoldered the Nichicon FW from the buffer it is because you had a doubt about their authenticity? And the same goes for the OP amps since you seem to replace them with the same 5532 ...
keep us informed when you have tested the module with the new assembled components to know if there is any better?