You don't say what amp this is so it's difficult to know. We also don't know if the outputs of this amp are bipolar or FET. That makes a difference. In a bipolar amp you can adjust the bias slightly higher so the amp stays in class A for a few watts more before switching to class B. Will it make a difference sonically? Doubtful. Will it prematurely age capacitors and other components due to the increased heat generated. Definitely. If you want a class A amp, buy a class A amp.
