Late reply, just signed up. I've had a pair of B&W DM7's since the late '70s, and after buying them had the self same problem of trying to find the right power amp. Tried many,many units, and ended up with a second hand Yamaha C2/B2. Using this combo transforms a good speaker into a great one. Quads, monster Dennon, Futterman, Meridian, all failed the test. However, I have never thought to recap the crossovers, so thanks to you guys, I have a new project !