I have 2 X KEF 45B subs and recently considered upgrading them to a single REL Stadium. But on demo, I decided the upgrade wasn't worth it. Currently my 2 subs are connected in dual mono mode using a splitter. Each sub sits L & R of the listening position. Given that my main speakers are also THX designs (KEF 23F) their frequency response ends at 80Hz, so I'm losing some valuable 'stereo' effect with a mono sub arrangement. What I'd like is an amplifier that provides split L & R subwoofer pre-outs. Is there anything out there that provides this and would not be considered a downgrade from my current Denon A1SE. A new Denon to come out with this would be nice.