What do you guys think of getting 2 750's instead of 1 770? With 10 channels of power, could you bi-amp the front 3 speakers and then have the remaining 4 channels reserved for the rears speakers in a 7.1 configuration? It would cost $401 more than the 770 alone, and you could take your time buying the second amp. I have never owned an separate amp(s) before so if this is impossible, forgive me.

You can bi-amp your fronts if they are bi-ampable; you can't bi-amp just any old speaker. You can tell if it is bi-amp ready if it has two sets of binding posts, connected by a jumper (you remove the jumper to bi-amp).

My mains are bi-amp capable, but my center is not. Centers don't usually have big woofers in them so I'm not sure that there would be too many out there that can be bi-amped. I haven't decided if I'm going to bi-amp the mains, yet, but it's definitely a down-the-road project if I do.

Also, those of you who do bi-amp: do you use a crossover in the signal cable to the two amps, or do you use a Y-adapter and let the speaker's crossovers do the work?

My mains and center are bi-ampable. (Paradigm Reference) I really don't know much about amps, but wouldn't you be sending 165x2 to each of the mains and 165x1 to the rears in the situation I described above? Or would difference in impedience get you close enough to the same power that you could even it out using the preamp?

My mains are triampable (Linn 5140); my rears are biampable (Mirage); and my center is biampable (Linn 5120). Also, the center channel produces a large amount of bass. I think the center channel is rated to 50 Hz or so, and I believe it gets there.

Is the 750 bridgable?

Charlie

No, sir.

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Gonk

What does an amp need to be bridgable, anyway? As I understand it, you basically just connect two channels in series with each other and invert the phase on one of them. Couldn't you do that with some clever external connections?

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Matthew J. Hill
matt@idsi.net

i wonder whether the y adapter should be at the amp end or at the pre/pro end when one tries to bi-amp? i havent read anything about that. any suggestion? thx. luke.

Isn't the benefit of bi-amping realized by having separate power supplies, i.e. monoblocks? Unless each channel is driven by a different power supply, I don't see what the potential gain is. I don't recall how many transformers the multi-channel amps have, but I'm sure it's not more than 2.

[This message has been edited by alfack (edited February 17, 2002).]

You need a crossover before the amps in order to realize the full benefits of bi-amping. It is different then bi-wiring.