i've got the DX 3065 component system with its own amp and was wondering if i install an electronic crossover before the amp, is there any need to keep the supplied passive crossovers for any reason but to split the signal between the woofers and tweeters? also, my passive crossovers are mounted 3-4" above the amp and i'm having some noise problems. could the proximity between the amp and crossovers have anything to do with this noise? the noise is a hissing sound that stops if i pause the CD or turn it off, and when the CD is switching tracks? i've got a speaker-RCA converter for the DX 3065 under my dash about a foot from the receiver. i've got another one right behind the receiver for my rear speakers (EX 572a) and have never noticed any noise coming out of them. i've also got a little engine noise. any help would be greatly appreciated.