Amps I have used with my CS6’s are:
1)Ampzilla 2000 mono blocks—very textured, excellent full frequency response, a touch hard on sibilance, these are my main amps
2) Yamaha P2250 mono blocked—pretty much the perfect amp for me thus far. Yamahas are excellent at getting all the bass out of these speakers and are just plain honest truth amps. Fans are a drawback.
3) David Berning ZH270–another near perfect amplifier, but struggles on power with the CS6’s
4) Carver Signature Sunfire 600–a great all-around amp. Doesn’t control low end well enough, but does give a nice presentation.
5) BAT VK-500–this amp gives a larger image, controls the speakers top to bottom, similar to the Carver but more control, more texture and darker darks.
6) Electron Kinetics Eagle 2–just a darn good amp. Can feel a touch ‘thin’ but it’s very fast, transparent and works great with Thiel but can be too much of a good thing with the Thiels.