Monoblocks did not work

Thx you all for your input. Garfish, Classe does have switch for mono/stereo operation as well as Balanced/RCA operation. Am running Balanced. Radio shake would have Y-splitter for balanced configuration? Will check it out. Redwiki, I don't know about opening the amp and bridging the RCA's( I am no techno either).

I think this is what I should do to go towards vertical bi-amping. Use the other pair of speaker cable and try out the biwiring with my existing STEREO amp. If the sound does not deteriorate, I try Vert biamping using radio shake y splitter. If works (meaning not deteriorate ) get the remaining pait of straightwire IC( Same as my existing brand, works great in my system) with straight wire Y-splitter at premap end and hope for best.
If not use the extra amp for (open a welding shop or something) my rear Dunlavy surrounds and just use he Multichannel Classe CAV-150 for cente channel only. Oh well! thx all.

Skip the bridging and go straight to bi-amping. While active biamplification is best, you can still get some gain by doing this passively. As you've noticed, most amps do not sound good when bridged. Sean
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Nilthepill:

Shame on me, I assumed you were using single-ended interconnects. Rat Shack will not have any balanced Y
adaptors. Tough call here. I still believe your sound will improve from biamping, however you will need balanced y connectors (not sure these are available) or a second run of balanced cable (if) your preamp has 2 sets of balanced outputs! Good luck!

Paul

Paul, you are correct about the load the amp sees. A strapped or monoed amp can produce a lot of distortion. Each channel of the stereo amp now just amplifies one half of the waveform. Lets say there was a channel imbalance between the channels and now the positive portion of the signal is not the same amplitude as the negative. This could amount to a lot of distortion in an amp with a channel imbalance.

I called Classe to day and asked for their opinion on the subject. " two much power for easy load speaker" they said. If I had hooked up to difficult load , it would have sounded better. Robert Adam re-iterated his recommendation if vertical bi-amping and swore (close) that I would get much better results than my current sound. So I am off to getting a new two pairs of same cable make with one pair out and two pairs in at the amp. Thx all for your support!!!!!