"the speaker level signal that reaches the main speaker's drivers isn't the same one that reaches the subwoofer's driver(s); remember there's an amp in the way in the subwoofer"
So Bob, What other connection to the sub do you recommend for proper integration? And for your info, the REL is not connected with speaker level inputs. It uses a advanced cable that connects to your amplifiers main outputs, that way its receiving the same signal as your main speakers. I have never liked any sub that uses a unbalanced or balanced connection from a pre amp or integrated amp. I love my REL because I never have to touch it, regardless of what I'm listening to it sounds phenomenal!