Yes, you can bi-amp using a multi-channel amp. I am currently using a 5-channel Rotel RMB-1075 to bi-amp my Revel F30 speakers. They sound good, but I'm actually researching the monoblock route, myself.
To bi-amp with a multi-channel amp, you'll need to get a Y-adaptor to take your single output from your pre-amp and split the signal into 2 different amplifier channels. You're going to spend more money on cables, as is probably obvious.
If you have not yet purchased your amp, I'd recommend auditioning different amps to make sure you get the most for your money. I think having better quality amps is better than bi-amping with lesser quality amps.
Good luck in your choice.
To bi-amp with a multi-channel amp, you'll need to get a Y-adaptor to take your single output from your pre-amp and split the signal into 2 different amplifier channels. You're going to spend more money on cables, as is probably obvious.
If you have not yet purchased your amp, I'd recommend auditioning different amps to make sure you get the most for your money. I think having better quality amps is better than bi-amping with lesser quality amps.
Good luck in your choice.