Recently I bought a 1994 Digitech GSP 2101 preamp/effects processor. I intend to use it with a tube amp and use the processor just for the delay/reverb/harmonizer WHILE using the preamp/distortion of the amp head. I connected them using the 4cable method and encountered a problem. Along with the amp's distortion and the processor's delay I am also hearing a clean DI signal that's noticably overpowering the amp's distortion. All suggestions to a solution are welcome.