hello I agree with Mig007 the kenergetics 800 system was invented by Tony DiChiro specifically for his pair of his Martin Logan CLS speakers. The key is the woofer size anything bigger than 10in isn't quick enough to match the eloctrostatic panels quickness but requires about 10 woofers to accomplish enough bass output. The crossover is very transparent also. A good high current at low impedance amplifier is required a Levinson 23.5 works really well.
Martin Logan CLSIIz - adding more bass?
I have Martin Logan CLSIIz speakers, VTL-MB 125 mono block amps (RCA inputs only)and a Sony CDS-X7ESD CDP that is connected directly to my amps. I am thinking about adding a subwoofer and was wondering if anybody has any advice? My room is quite large (open floor plan) with a high slope ceiling in one part-like a loft. I don't know the volume but dimensions are about about 20 x 30ft with the highest part of the ceiling about 18ft. My budget is around $1000-1500USD and I only buy used! Thanks!