I'm thinking of building some main monitors to replace my Tannoy DMT 15 MkII's. I've looked into ATC's P4 monoblock amplifier and crossover but it weighs in at £4500 (roughly $8100) and of course I'd need 2 so I've been thinking of a cheaper solution using some of the kit I have already. I've got a pair of ATC 15" bass drivers already and I want to add an ATC midrange and Seas Excel Millenium tweeters. I've got no problem with building the cabs. I have 2 Chameleon power amps driving my Tannoys and I intend to get another to tri-amp the new speakers. What crossover would you recommend I get? I looked at a Dbx 234xl which is a 3 way stereo crossover but I must admit this is something I know hardly anything about so do you have any recommendations? Is this for live use, would it do those drive units justice? What about hi-fi crossovers? Any thoughts at all on this project of mine would be fantastic.