I'll second the reco for the GRX4... that's the best sounding (most transparent) switching unit I've tried to date.
rickgk said:
Bdeursch when you were running the Rm4 into the rm20 did you need a module in the rm20 itself?
I was also wondering if the mic eliminator xlr direct out is post poweramp stage on the rm20? or is it just a preamp line out?
And finally does anyone have the manual i can download? It's not on the randall site it seems.
Anyway, to answer your questions... I'm pretty sure I didn't need a module in the RM20 when I was using the RM4 in the loop, but am not 100% positive. Most of the time I used that setup I would use the RM20 as a means to carry a 5th module, in case I wanted to swap one out mid-gig or mid-session. But theoretically, coming in through the FX loop should be heading straight to the power amp (not back to the module circuitry), so there shouldn't be any problems with it.
I thought the mic eliminator jack was supposed to be tied into the power section, though once again, I don't have any way to confirm it. I do remember it being downstream from the FX loop, at least. It's more than a preamp line out, though... it is voiced with a cab simulator, so it sounds better than using preamp outs for purposes of recording. I actually did a few demos using the RM20's mic eliminator and found it to be better than other cab sims I've tried.
Finally, I don't have an electronic copy of the manual, though if I remember right, the manual felt pretty generic... most of the content was general MTS stuff (similar to the RM100 manual) with an extra row added to the tube biasing table to show the proper values for EL84's.
(Sorry I can't be of more definite help... I had an RM20 for several months, but recently sold it, so I'm trying to remember it from the dozens of other amps I've owned over the years)
--B