Long time fellas.. Have a few questions regarding using an external crossover with this amp.. The amps got two discreet 300 watt rms amplifiers.. It's also got a built in XO.. Two big problems with this.. A) When in biamp mode, the low channel gets fixed from 250hz and below. B) the high channel gets a variable signal, but it starts @250HZ and above C) The high channel drops to 150 watts rms The crossover network is tailored for use with the Trace Elliot cabs which I'm not fond of.. The amp has an effects loop that operates in stereo or mono.. This being said could I use a two way crossover there? Send 1 channel of the effects loop out to low pass, 1 channel out to high pass?? The reason I want to use a crossover? I play a 5 string in a very loud metal band.. I have played through a handful of cabinets, the best sounding has been a single 18 or 2 15s on the bottom, with a 2x10 or 4x10 up top... Problem is, if I run full range to both, the 10s always end up farting out with the B string.. When I biamp, I lose too much of the thump I'm getting from the 10s.. So, should I incorporate a passive HP filter for the 4x10 cab? Or is it possible to run an electronic XO through my effects loops? One other thing.. I seem to be having trouble with the preamp side of things... Does the trace elliot head have an adjustable bias for the bass input/preamp side of things?? On the preamp side, there are 3 colored indicators for input gain.. A yellow light means add more input gain, a green light means optimall while the red means too hot.. Trace recommends mostly green, occasional flicker of red.. The reason I get into this?? The Warwick bass has a 3 band MEC preamp with Bartolini Jazz pups.. These are the 59Js I believe.. The ones that have the deeper darker tone.. Anyway, I cant seem to get the bias right.. With the bass Pre bias turned down, the pre knob on the Trace needs to be cranked all the way up for it to get in the green.. When I turn the bias in the bass up, I get a flubbery sound.... GAAA!! Too many variables... Anyone in South Florida a wizz with amps? Anyone in South FL a wizz with setting up basses? I def need one or both... Please help!!!!