I use a pair of Velodyne HGS-15s in the corners of a 14’ X 19’ room with acoustic room correction by an SMS-1 to supplement KEF Reference 1s below 80 Hz @ 24 dB/octave. The result is excellent. I’ve tried a couple of high-pass filters, but they seem to take a bit of air out of the sound, perhaps a peculiarity of the sticking them between an Ayre preamp and amp with the zero feedback.
Single vs. Dual Subs
It's common wisdom that dual or multiple subs help smooth out bass response in different spots in the room, but what about for a dedicated listening room with a fixed single listening position? What do two subs add to the music presentation that a single dialed in sub is missing provided that single sub is dialed in perfectly for the listening position?
Caveat: not interested in the SWARM method or multiple subs at the moment, strictly comparing single to dual subs
Caveat: not interested in the SWARM method or multiple subs at the moment, strictly comparing single to dual subs