Do you mean bi-amp or bi-wire? To bi-amp them you need an active crossover and two separate power amps. To bi-wire, you simply run two pairs of speaker wires, one pair to the high frequency drivers and one pair to the low frequency drivers. Both pairs come off the same set of amplifier outputs. The crossovers in the speakers determine what gets fed to the tweeters/mids and what gets fed to the bass drivers.
Parasound amps work well with B&Ws (I have used them on bothe 804s and 803ds) as they have a good high output current capability.
I would look for used versions of the HCA series, as these are good bang for the buck. The later Halo series are nice too, albiet more expensive.
Parasound amps work well with B&Ws (I have used them on bothe 804s and 803ds) as they have a good high output current capability.
I would look for used versions of the HCA series, as these are good bang for the buck. The later Halo series are nice too, albiet more expensive.