Something must be wrong if you are hearing a significant difference in the sound for better or worse. Maybe the opamp was damaged from soldering the capacitor? What opamp are you using? Any pics?
Opamp is a 1656. I cannot thing it is damaged because is mounted on the socket, Now cap is removed and amp sounds exactly as before cap was mounted. With cap mounted i can hear a very close sound.
That is not a good idea soldering direct to the op amp. High risk of themal damage to the chip. Solder the cap underneath across the pins
I can’t imagine soldering to the pins of a thru-hole opamp is all that risky but a surface mount opamp like the opa1656 is a different story! Soldering the cap underneath the board also has other advantages like keeping the lead lengths super short. That being said I don’t think the capacitor across the power pins is even needed unless the opamp is unstable.
I just looked up the specs on these capacitors and they huge 25x16x6.5mm. How on earth did you mount them to a tiny surface mount opamp?
Is there any chance that there's shui yuan TPA3255 mono version of amplifier ?
I'm not keen to mod the stereo version
Try not to release some magic smoke
I'm not keen to mod the stereo version
Try not to release some magic smoke
Hello everyone,
I want to know how to reset the tpa3255 on my A07, it came with a very loose banana plug that got disconnected and touched another one on the panel when the amp was on.
When playing music, the power has decreased a lot, more than half, I think it has gone into some protection mode.
turion64 mentioned:
"Let's try something simple. If you haven't tried a RESET of the amp let's try that. All you should need is a SPST momentary push button between the reset pin and ground pins on the board (if you've got steady hands you could just use a piece of wire as a jumper). The board must be powered up when doing the reset."
Can you give me more details about this?
Thank you
I want to know how to reset the tpa3255 on my A07, it came with a very loose banana plug that got disconnected and touched another one on the panel when the amp was on.
When playing music, the power has decreased a lot, more than half, I think it has gone into some protection mode.
turion64 mentioned:
"Let's try something simple. If you haven't tried a RESET of the amp let's try that. All you should need is a SPST momentary push button between the reset pin and ground pins on the board (if you've got steady hands you could just use a piece of wire as a jumper). The board must be powered up when doing the reset."
Can you give me more details about this?
Thank you
Are the TPA3255 chips unavailable for the rest of the year? I was looking for a higher end board at least at the 3e level and can’t find any.
A little birdie informed me recently that the TPA3255's are back in stock, you can see this yourself on mouser for example. But other parts are in short stock of course. Expectation is hopefully end of the month for boards being available it seems. I've tried 3e boards and JLE's and I highly recommend the JLE boards. I run a dual mono Sylph D-400M, but planning on building another amp to support 5 more channels from JLE boards.
If I’m driving 4ohm speakers is there much to be gained by going with a pair of amps in PBTL mode compared to a single stereo board in BTL mode?
A nice manufacturer, well designed, high end components across the board, PFFB enabled/disabled via a jumper, and most importantly, phenomenal sound.
All of the above certainly, but also I would add that the JlesterP follows up and continually develops the products even after sale and supports users to implement improvements. JLE is a very reputable boutique manufacturer in my opinion.
Good question.I'd be curious even on classical paralleling of class d amps if it works better .
Assuming this is true...
https://www.diyaudio.com/community/threads/tpa3116d2-amp.237086/page-489#post-4932190
Less stress on component epecially Inductor and MOSFET . They share 50% load.
Less heat and more current headroom
I’m hoping the new 3e boards are available soon. I’d really like to try a pair of mono boards each with its own power supply. Everything should run cooler and I may not need to use a fan.
My customer compared tpa3255 with irs2092s + irfi4019
The results showed that irs2092s + irfi4019 + - 50V was much better than tpa3255.
My customer has now decided to replace the previous tpa3255 version with irs2092.