My Halcro MC20

Dude you need a subwoofer. Speakers only give you so much bass. If you want real wallshaking gutwrenching or as I like to call it doing damage to your internal organs bass, Your gonna need at least 1 subwoofer

I have heard these with the levinson 332 it was my amp. Theyll play loud but your not going to get the bass your looking for from what it sounds like your describing

What is the gain of the Thor? My Conrad Johnson pREMIER 16 lsii has a gain of 26. Or you could need a subwoofer to get what you want.

The Focus will play extremely loud (and clear...sometimes the bass is too pronounced - IMHO). If they will not play loud, something is not right. Probably a hook up issue or something is malfunctioning.

The Legacy's will play loud I have them and just had an audition of Mark Levinson's 332 amp, 200 into 8 ohms. So the speakers can do it. Could it be cabling or does your Thor have a mute or db lowerer that may have been left on?