Okay, so here's the deal: I'm trying to put my Fender Stratocaster through to an Apex ASB1 switch box, which splits the signal then goes to a 75-watt Line 6 Spider III and a dual speaker 75-watt per side Line 6 Spider III (therefore twice the wattage). For some reason when either amp is on there's a horrible buzz in the signal. Regardless of whether I have one or both amps on this same signal is present. What would cause this and is there any way I can remedy it? I don't think it has to do with the phase because it's there whether or not I have both amps turned on. If/when I get it fixed I plan to mic both speakers of the larger Line 6 separately with dynamics and record the smaller Line 6 with a condenser or a dynamic. I'm up for trying different techniques but first I need clean signal through the amps.