Who mods class D/digital amps?

Try reducing the analog input sensitivity and see if that helps. Also, are you sure the IC's you have are balanced? If you can't tell, list them.

This problem doesn't sound like the type of thing you can fix with a mod.

You may want to check in the owners manual because there's no standard way to deal with this. Balanced components are usually designed in such a way that allows them to switch back and forth between balanced and single ended operation. So if your preamp is SE, you want to make sure your amp is set to run SE also. If not, you can have all kinds of problems. What you need to do will definitely be listed somewhere in the manual.

Here's a few things that may prove useful.

-Sometimes amps that are not balanced still have xlr connections. So you want to make sure that your amps are fully balanced.

-Same thing with cables. They need to be fully balanced and not just an SE cable with xlr connectors.

- Also make sure the CD's themselves are not the problem. Try them on a different player just to be sure.