Help with bi-amping


Can some of you help me to understand bi-amping?
I'm considering bi-amping my speakers, but I would like to know more about what's involved. Obviously, my speakers are bi-ampable, so my question is surrounding the amps. If I have 2 100w stereo amps, one for each speaker, does each speaker then get 200w of power, since I'm feeding one speaker with both channels? And what about the preamp/amp - does the amp have to be a "biampable" amp, or will any amplifier be capable of doing this, and does my preamp have to be biampable? Right now, my preamp only has 1 pair of front outputs - do I need 2 pairs? And lastly, do any of you have experience with both bi-amping and bi-wiring, and how do they compare, musically, logistically, financially, etc.
Thanks for any help with this topic.
ktsteamer

Showing 2 responses by drrdiamond

First of all, Greg's thread is very good.
Personal (and limited experience):
I have owned B&W800's (quad wired) for about 9 years and love them. This year, I finally was able to actively bi-amp them (with all Krell). With everything else in the system staying the same except the addition of the 2nd amp and x-over, I experienced the biggest improvement that I have ever experience in my system, bar none.
Although Krell and others recommend that it is better to vertically bi-amp (one stereo amp per side), I have two different amps so I had to horizontally bi-amp them (one stereo amp for the bass and one for the mid/highs). There are some theories about the benifits of horizontal bi-amping such as:
1. Complete separation of the top and bottom frequencies at the amps so each amp must only "worry" about certain frequencies.
2. Complete separation of the frequencies at the speakers so there is no chance of any interaction of the bass to the mid/highs.
3. Ability to use different amps which favor top or bottom frequencies.

Everyone that I know that has gone from bi-wiring to bi-amping, either active or passive, has found large improvement, but as Creg said, much more improvement with active bi-amping, assuming it is done correctly.
Have fun!
Richard
"Who makes the best crossover" ... In my opinion it is Krell. Their KBX can cut frequencies like a knife and can be customized by Krell for any speaker. But it is pricy.