My speakers work beautifully with a VTL 2.5 preamp and bi-amping with two Rotel 1090's. Each 1090 puts out 375wpc into 8 ohms, and more into 4 ohms. Bi-amping was recommended to me by both the B and W folks at their Reading, MA headquarters, as well as through communications with the Stereophile staff. They're right!
Enjoy........
Enjoy........