Rythmik F12G owner here. I don't own electrostatics, but have Magnepan MMGs. The F12G is very fast and musical sub that has a very good array of controls to match your listening preferences, whatever they may be. Can't go wrong with a Rythmik, IMO. It marries very well with my Maggies. I cross at 80 after much experimentation with 60 (right around where the MMGs drop off) and 90. A 90 Hz crossover made the Maggies sound too thin, 60 was a bit too congested-sounding. 80 was the sweet spot that really crystallized the Maggies and tightened up the bass presentation.
Comparison of various subwoofers for 2 channel audio
I have a 2 channel audio system, and I appreciate how subwoofers have augmented the sound quality of my system (with electrostatic speakers). I currently am using a pair of Martin Logan Balanced Force 212 subwoofers, but I’m thinking about adding more subwoofers for a total of four in order to help balance the low frequency sound waves. I’m considering adding a pair of Rythmik, SVS, or perhaps Velodyne subwoofers to the system. Does anyone have experience with many of those brands, and how well they integrate with electrostatic speakers in a 2 channel system, or perhaps should I just get a second pair custom built with certain specifications?
Thanks.