I ended up buying the Yamaha RX-V375 5.1 receiver, and boy am I glad. My living room speakers are old Boston Acoustics T1000 towers with major modifications. I removed all of the drivers and the crossover and covered all the speaker holes with a piece of wood, except for the bottom hole for an 8" woofer. In that I installed a Dayton Audio Reference woofer. This became the back of the speaker. On what was the back, I installed a Goldwood full-range 8" speaker with a whizzer cone. With the EQ in the Yamaha, I could smooth out the frequency response of the full-range 8", and with the subwoofer management I adjusted the back woofers to kick in at 100hz. It sounds amazing! I have our old receiver, an Insignia (Sherwood), driving the subs, so I can easily turn them up or down. All is good here. Peace and goodwill.