I have a custom cabinet with a bi-amped GK amp, but my horn is really quiet unless I have my boost on the preamp up alot, with the woofer amp turned down quite a bit. What would cause this? Unless my boost is up, I can have my tweeter amp up full blast and can still barely hear it even if my woofer amp is all the way down. I just have my 50 watt horn amp going directly to a GK Paragon horn, the same one as the GK cabinets, via 4-conductor speakon. Maybe this is perfectly normal, I don't really know. The horn just doesn't do much.