Hi,
I'm working on a replacement preamp and amp for an old B&O. See this post https://www.diyaudio.com/forums/class-d/342430-beomaster-refit-controversial-6.html
I have a TPA3116 based board from Aliexpress, XH-M569, this board had some bad noise issues from an unnecessary opamp on the input, I removed this as suggested elsewhere and now it has acceptably low noise.
I am trying to hook it up to an NE5532 based preamp, aliexpress XH-A901, but it has a terrible whine noise, which is not dependent on volume. I have tried several power supplies an configurations, running both amps on same power and separate power.
Both the preamp and the amp have single line inputs, would it be possible to convert the preamp output to balanced? Would this help with the noise?
Can anyone help with how to eliminate this constant whine noise?
Thanks,
Theo
I'm working on a replacement preamp and amp for an old B&O. See this post https://www.diyaudio.com/forums/class-d/342430-beomaster-refit-controversial-6.html
I have a TPA3116 based board from Aliexpress, XH-M569, this board had some bad noise issues from an unnecessary opamp on the input, I removed this as suggested elsewhere and now it has acceptably low noise.
I am trying to hook it up to an NE5532 based preamp, aliexpress XH-A901, but it has a terrible whine noise, which is not dependent on volume. I have tried several power supplies an configurations, running both amps on same power and separate power.
Both the preamp and the amp have single line inputs, would it be possible to convert the preamp output to balanced? Would this help with the noise?
Can anyone help with how to eliminate this constant whine noise?
Thanks,
Theo