Why is there a HUGE improvement in my KLF-20s after bi-amping? I have had these (used) for 6 months and have posted questions and thoughts on the lack of bass and poor imaging. I thought it must be my old Denon DRA-1035R receiver in spite of it's 135w output. So, I picked up a Nakamichi TA-2A reciever with "some" inprovement. After putting the Denon on Craigs List, I was bombarded with buyers. So, I bought some RCA spltters and put the big Denon on the lower speaker terminals and the Nak (55w) on the upper. UNBELIEVEABLE inprovement. So, do my KLF-20s have bad cross-overs in both? Thanks, Dennis