Bridging amps.

Thank you very much for all of your input. I'm going to take your advice and forget about the bridging. I will be looking for some of the amps that you have mentioned. I already have five other amps but I can make room for a few more.

dunno about the adcom 565's, but i use a pair of the original adcom gfa555's, bridged, to drive my vmps larger subs, and the bass response is excellent - tight, accurate, textured, powerful...

The Adcoms are not that good for bass. My recommendation is an Eagle 2A or the Kenwood L09M. Both of these are fantastic bass amps. The Kenwood is a 300 watt mono amp from 15 - 20 years ago. The Betas need tons of power on the woofer towers to do them justice. Happy hunting.

I had the Beta towers and tried all sorts of amplification for the bass. The best I found was a QSC M3000. Less than $1000. Much more punch than either Bryston or Krell.

this is not a question of "bridging" (which involves using two or more stereo amps as monoblocs) but one of bi- tri- or quad-amping. first, you'll need a preamp, or direct source with volume control, that has 2 pair of outputs or more, fairly unusual unless you use single-ended and balanced simultaneously (not recommended). second, you'll need a pair (presumed) of speakers that are bi- or tri-ampable (your infinity bass towers do NOT appear to be bi-ampable). then it's just a matter of impedence matching and purchasing a sufficient number of (matching, i should hope) speaker cables.