Sorry but that statement is utterly meaningless.The problem being sought as being solved, is in one word , mediocrity
Can you outline your technical reasons for thinking a high impedance supply will improve sound quality? Im serious, I just want to hear your theories. There may be basis to them.
Also what tests have you performed to quantify and demonstrate this assertion and demonstrate this apparent "mediocrity"?
If you dont have any I think its pretty clear you have just jumped to some conclusions about the circuit design and cause and effect.