Teac AH-500 PS – to power a TPA3255 class D amp

[Ironhorse]

I have a Teac AH-500i in very good condition (upgraded; almost all new high end parts; did cost be a fortune). Nevertheless, I am not happy with the performance. Especially the bass is not as impactful as I would like.

I was thinking of getting a higher end TPA3255 class D amp module and replace the class AB power amp boards of my Teac AH-500i. I would still be able to use the nice chassis, volume knob, the preamp and the power supply.

The schematic of the power supply is attached.

The Teac AH-500i has two dual Dual-Voltage (+36/ -36) railes. But the TPA3255 also needs one 36V power. The higher end TPA3255 boards are all stereo board which makes it even harder to do.

Any suggestions? Is this a good idea? Can this work? How to connect the PS to a TPA3255 board.

Thanks.

 

[PRR]

Move two caps. (Electrically, not physically.)

 

[Ironhorse]

@PRR: Thanks for your reply.

I guess that would work but I would need some confident soldering skills as there will be much current in the new connection.
And this would only make use of half of the power supply if I go with one TPA3255 stereo module.

I guess I will get two Hypex UCD 180 board. These would need dual voltage power supplies and I can get them in mono. The UCD 180 should also be not worse than high quality TPA3255 boards.

 

[nironiro]

If you have intention to use tone controls from original Teac amp, check if they are in the NFB of power amp.
If they are in the NFB of power amp, than it will be very difficult to use them in the new configuration (with new TPA3255 power amp).