Check out this very favorable review. I have bought a ref 30, but haven't hooked it up yet.
http://www.hometheaterhifi.com/volume_7_4/b&k-ref-30-preamp-processor-12-2000.html
http://www.hometheaterhifi.com/volume_7_4/b&k-ref-30-preamp-processor-12-2000.html