I previously owned the CLS's setup with the Kinergic SW800's (SW800 Amps included). Does not get any better than that. Won best sound at CES several years ago.
I have since changed speakers (Watt/Puppy) for hometheater purposes, but still have the SW800's. Although they are setup for use with the Martin CLS specifically (i.e. specifically designed for the CLS by Kinergetics) they are great subs. Fast, powerfull etc. They work better than anything I have heard short of the 20K sub from Wilson Audio. You can feel them a block away. Don't think I'll ever get ride of them. Forget what I actually paid for them but it was significant back then. FIND A PAIR FOR YOUR CLS'S! THEY WILL GIVE YOU GOOSE BUMPS!
I have since changed speakers (Watt/Puppy) for hometheater purposes, but still have the SW800's. Although they are setup for use with the Martin CLS specifically (i.e. specifically designed for the CLS by Kinergetics) they are great subs. Fast, powerfull etc. They work better than anything I have heard short of the 20K sub from Wilson Audio. You can feel them a block away. Don't think I'll ever get ride of them. Forget what I actually paid for them but it was significant back then. FIND A PAIR FOR YOUR CLS'S! THEY WILL GIVE YOU GOOSE BUMPS!