Hi, I'm new here so please be gentle, I have an Amp Labs modified quad 303, with Tisbury pre, ps audio dac and home built ( not by me I must add) home theatre pc. Since recently buying the amplification I have noticed audible interference when using the pc, I never had this trouble with my old amp(Leema tucana) I'm not technically minded so is there an easy fix to this problem? Many thanks Chrispy