I've just tried connecting a 10p and 10p3 to my C30 pre amp by 'daisy chaining' them but I'm getting some odd background noise from my speakers. Is there any reason I shouldn't connect one amp to the 'direct' out and the other to the 'buffered' out on the pre amp instead of daisy chaining? This seems to get rid of the background noise but I was wondering if it will effect the quality or cause any other problems. The other thing I wanted to know is which amp to use for low frequency. I'm bi-amping my main left/right speakers with a 10p and 10p3. The 10p3 also powers my center channel when watching films. Question is do I use the 10p3 for high or low frequency connection to the main left and right or will it make no difference either way? Thanks to anyone who can help!