Powderdocter, take a look at my review here on the GON regarding why I now have a pair of Martin Logan Depth i's sitting behind my biamped MG-20's. You will be amazed at what the right Subwoofers will do to the soundstage depth/width, layering in the soundstage, and "ease" of your 20.1's, not forgetting the extension on the bottom end. I just want to share if you don't have your MG-20.1's on Myesound stands you have not heard their true potential sonicly.
Subwoofers for Magnepan 20.1s?
I used Granite Audio's Ultimate Low Bass CD and my 20.1s go to 25Hz at -10dB and my room is 16x26x10 (speakers approx 6ft from back wall and 3.5ft from side walls on ends). I can get -6dB in the 29-33dB range and then it is pretty flat with a slight drop in the 50-60Hz range. I am not a bass fanatic, but on some recordings, I wish I had some further lower bass extension without becoming unnatural sounding/boomy. I know HP likes Nola Thunderbolt subs with the 20.1s. Has anyone tried them or any others? Other system components: Pass X250.5 amp and Xono phonostage, Audio Research Ref 3 preamp and Ref 8 CD player, VPI superscoutmaster reference turntable/10.5 tonearm, Dynavector XV1S cart.