I politely disagree with Chadeffect, I never have heard a 20 or 20.1 even with modified passive X-overs sound any were close to the performance of these speakers when they are bi-amped with a good active crossover.
I recommened the Bryston 10B active crossover, it's what I use in my system with great results. I believe it retails now for around $3000.00. I agree that the Pass Labs crossover is terrific, but costs almost twice as much as the Bryston. I know Maggie owners who have run the experiement between these to active crossovers and they came to the conclusion that sonicly the Bryston is right there with the Pass Labs for alot less money. Both are extremely well built, see if you can find either used here on the GON.
I recommened the Bryston 10B active crossover, it's what I use in my system with great results. I believe it retails now for around $3000.00. I agree that the Pass Labs crossover is terrific, but costs almost twice as much as the Bryston. I know Maggie owners who have run the experiement between these to active crossovers and they came to the conclusion that sonicly the Bryston is right there with the Pass Labs for alot less money. Both are extremely well built, see if you can find either used here on the GON.