Did I read you correctly in that you have your amp plugged into the P300. You will probably do better with the amp plugged directly in the wall. The ps 300 is not meant for amps
Bel Canto EVo 200.2 Digital Amp Owner's
Owner's Progress Report: I just received the EVo last Friday. It replaced a McCormack DNA2 LAE. I have just started breaking the unit in. I'm using the Purist Audio II CD for break-in. My system consists of Sony SACD, EVS Attenuators, EVo 200.2, Eggleston Andras, Harmonic cables, Powersnakes, and PS Audio P300. The amp pulls 100 watts from the P300 and the SACD player pulls 50 watts. I'd never been able to do this with the DNA2. This amp blows away the DNA2 LAE in resolution, imaging, transparency, depth, dynamics, you name it. All the 1/3 list price. Purchased mine from John Goldman at goldmanaudio.com. John puts his customers before himself. This amp is a no brainer and its not even broken in yet. . This and the Sony SACD player has been the best money spent in audio.