Soundlab speakers with sub woofers?


Hello, I'm looking for input from folks that have used Soundlab speakers or electrostat speakers with sub woofers. It's thought that the sub woofer needs to be quick in order to keep up with the speed of the panel and integrate seamlessly. Has anyone found a subwoofer(s)that was fast enough to work with an electrostat panel and more specifically Soundlab electrostats? What model of subwoofer worked well and how was the subwoofer integrated into the system?
128x128keithmundy
"10-29-14: Atmasphere
The right amp is what makes for bass on a Sound Lab. Generally speaking, transistors are not a good match. The reason is the Sound Lab, like most other ESLs, has a 10:1 change in impedance over its range, and is over 30 ohms in the bass, making it hard for transistor amps to make power, and it does need the power."

Every time I heard Soundlab speakers it was with SS amps. Even at CES, Soundlab used SS amps in their own room.
Post removed 
I'm sorry Bob_reynolds but none of subs you suggested come even close to Soundlab's B1 or B1S. None of them will properly integrate with Soundlab panels, they don't have the resolution and you're stuck with their crappy built in amps. Once you get into Soundlab level speakers you need the rest of your system to match accordingly. If you use Tube amps on the panel then that's what you need for the sub or you stay all SS of the same quality, preferably the same amp for the subs. IME these powered woofers will do for HT sound effects but they don't have the quality for high end music reproduction.
david
Thank you all for the responses. Yes, I agree SL does have pretty darn good bass. I'm just worried if I might need to use other subs to get the bass optimized because I will not be able to move the panels around which appears to be the usually the way the bass is optimized with the SL
Keith, subs aren't woofer towers, they're the to enhance the low and very low frequencies, you can't use them for easing speaker placement.
david