1 channel Krell FPB-200

You can use only one channel of the FPB 200. However, you'll get more out of it if you used two of them for bi-amping. Use one channel for the mid/high and the other channel for the bass. No point in wasting the other channel.

I agree with Sfstereo.

You might also consider selling the one FBP200 and getting the 300 or 600. You will be loosing the advantages of the monoblocks but will be getting smoother sounding amps.
Sfstereo, what do you think?

Richard (in SF)

i think what you are asking can you use a 200 as a bridged monoblock with both channels run into one for more power, the answer is no. the above posts are right on how you could improve sonics and power.