tested the rane crossover and everything works except the channel 2 low input. it produces a very loud uncontrollable buzz/hum and produces zero sound. but, everything else works and used it hooked up to the carver pm-600 in bridged-mono to test the subs, the carver can put out some serious freakin power and works very well i think. i think it's rated for 700w or something for bridged-mono. haven't got chance sit down give listening tests yet cause just got done working on stuff and had to deal with a couple people for the house. only tested the rane crossover so far. don't know what can be wrong with it yet but, guess will figure it out later on. it did sound good running the jbl 4645(2245h) sub though.