it not a power amp its an animal! so so good mate, i just changed cables ( chord cobra 3) aswell (very goood cables )but i think the cambridge audio units are holding it bk but no worryes there is a advance acoustic pre amp and tube cd player on the way this thing is enormus mind u i have to get anew rack it dont fit in my current one but who cares it sounds fab it never runs short of power or dinamics im very happy withy it