I have a Line 6 DL-4 Delay Modeler running through my effects loop. I just got a crossover, and run it before the delay. When I get unity gain by ear with the crossover's built in gains to the amp's original gain, my line 6 starts causing all sorts of unpleasant distortion and tone meltdown. The effects sends of my Mo' Bass are 220 Ohms, and I'm pretty sure the Line 6 has a HIGH input impedance (of course they don't list it in the owner's manual). If I turn down, the problem is fixed, but then I must turn up the amp to compensate. Ideas?