I use a Pioneer VSX-74TXVi as a home theater processor with a Parasound HCA-1205A 5 channel power amp. Both are rated at 140 watts/channel but the Pioneer/Parasound combo sounds much better than the Pioneer by itself. My Pioneer has the capability to biamp which I do with my Parasound to my Magnepan IIIa speakers. I would definitely recommend using a separate power amp with your B&K. It will definitely be a step forward.