I have never owned the "p" series of Accuphase, I have always been a sucker for pure class "a" from a sound reproduction standpoint. The noise I referred to from the Lamms was not one reproduced through the speaker, but simply the "noise" of the amp itself as it ran (hum). For "most" it probably isn't an issue, but I like dead quiet which the Accuphase A-50V has. In my opinion a single A50V vs the Lamms in Mono setup, I give it a very even score sound quality wise, but again give the accuphase the edge on quietness, and heat production. I have not heard the A50V in bridged mode, but if it improves at all what it does as a single unit, I would then most definitely give the edge to Accuphase. On another note the build quality , asthetics, and user touches (binding posts) are clearly in the Accuphase camp. Lamm simply doesn't compare in this respect. I run the A50V w/ the C-290V pre and DP75V with Kharma CE 1.0's and have never been happier with a system.