Got a Boss DD6, one output to an Ibanez toneblaster 100R, the other to a Crate GX212. (removed all other FX, switches and leads etc) The Ibanez amp sits there, nice and quiet, but the Crate amp hums really load, very annoying. I've put a mains power filter on both amps and thats helped a little but the Crate is still too noisy to use. Unplug the lead from the Ibanez amp and the Crate is fine, substitute the Ibanez amp for a Marshall and the Crate hums like hell again. Any clues for what to try next? HELP!