When I was running a sub in my 2 channel system the Vandersteen Sub swq or whatever its called now sounded very good. Used them in a pair and as a single sub. They were musical, quick, stable and went deep. It integrated well in to the system musically. With that said they hook up differently (directly to the amp with filters removing the bass from the mains being restored by the subs). So to get them right you have to play around with them with the temporary adjustable crossover from Vandersteen. When you figure out the exact location of the crossover point for your system you get the x1 crossovers and plug those in for use in your system.
I would be still using them now but I simplified the system they were in from 2 mono block VTLs (3asigs) with the two Vandi subs. Later got a pair of Mod 5s for a couple of years. Eventually, heard something I liked better in Von Sweirkerts that I have been happy with for the 3 years, now my system is as complicated with 3 amps as it ever was. The Mod 5s seem to go as low as I need them to with a vertical bi-amp set up. VSA Mod 5s in the 2 channel and VR 3s in the ht system.
For another sub I like SVS and use one of their cylinder subs in my HT. Sounds very good but not as good on music as the Vandersteens did but the movie bass is stunning.
I would be still using them now but I simplified the system they were in from 2 mono block VTLs (3asigs) with the two Vandi subs. Later got a pair of Mod 5s for a couple of years. Eventually, heard something I liked better in Von Sweirkerts that I have been happy with for the 3 years, now my system is as complicated with 3 amps as it ever was. The Mod 5s seem to go as low as I need them to with a vertical bi-amp set up. VSA Mod 5s in the 2 channel and VR 3s in the ht system.
For another sub I like SVS and use one of their cylinder subs in my HT. Sounds very good but not as good on music as the Vandersteens did but the movie bass is stunning.