This off of a review for the Dennon 3805. Summary: Sssssssh! Listen up! Want to improve the already great sound of your 3805? Set all speakers to large; turn subwoofer OFF or NONE. Set to play on Pure Direct. The full signal + LFE is sent to your L&R mains. Connect a "Y" adaptor from your front L&R preamp outs to your subwoofer in. Why do this? This removes a crossover that results in even warmer, sweeeter but cleaner sound! Believe me...you are not getting the most potential out of either your speakers or amplifier without setting up the 3805 in this manner. I also use a SignalCable 8' power chord that gives a superior current flow that improves dynamics very noticeably, along with SignalCable interconnects and speaker cable. If you run pure direct you cannot run in dd or dts.