Don, don't expect too much bottom. The sound of the CM-30's are, IMHO, more a full sound that gives a hint of bottom, but not a lot of bass. Since I tried mine with my EV Sb120a, I'm always tempted to use the sub with them. If you are looking for a sound with a lot of bottom, this won't be it. But if you can live with a good, full sound I think the CM-30's do a good job.

My CM-30's handled 3 hours of SMF at full tilt. Of course, again, that was with the aid of a sub. But the last few songs of the evening were without the sub and overall sound was very close, maybe not as penetrating.

I'm not trying to be the poster boy for the CM-30's. I just have a pair and like them a lot. I think they do a good job in the situations I use them.