Mr Tennis - I have the Maggie 3.6R's and have found ( after much experimentation, I might add) that you want to go with a sealed box sub, otherwise the bass lags behind the planar midrange too much. I use the Revel B12 Concerta with a short all silver(for speed) sub cable. My speaker cables/interconnects to the amps are a combioned 14 ft, so this also helps with the "speed" issue. The Concerta B12 is perfect with the planars and I would think one would do it for you. I am in a large room, so I needed two of them. The price is right as well - at $995.oo, these are VERY good subs, with a parametric equalizer as a bonus. I have heard teh Rels work as well, but I can tell you that the Hsu Research subs do not blend in well with the planars - I tried a VTF3 and it was WAY too slow. I hope this helps. John