I have three compressors: one built into an Eden WT-550 amp, one built into an Eden WTDI, and an EBS Multi-Comp. When I use any of the above, I "do not hear" the slightest bit of difference. I've used just about every possible setting of the compressor control knob, right along with all the other knobs (gain, volume, etc). Even turning the compressor to off - nothing! I've read that "if you don't hear the compressor - it's working!" I can't fathom that. Anyone have good answers that would help me out?