Marshall Amp Forum - View Single Post - The JCM 900 and modification... Thoughts?

V-man · 10-30-2009, 04:15 PM

Quote:

Originally Posted by TPR

Oh, you know about the loop adjustment control on the 4100, right?

Thanks for the info on the sonic max. I was thinking about getting one for my 4500, so now I'll definitely pick one up since it can't hurt to try, right?

I do indeed. I first tried adjusting sensitivity when running MXR-108 through the loop. It was asstastic all the way around. I never tried a delay pedal, but between the Sonic Stomp box, the 108 pedal, a Lexicon reverb rack and a BBE 392 rack, I have concluded that racks sound great in the loop and pedals do not.

Quote:

Originally Posted by donkost

I'm just looking for an excuse to pick up a volume pedal, and I'd probably go with the Morley as I also have a Morley Bad Horsie II wah. I used to have one of the big box AC-powered Morley Wah/Volume pedals back in the 80's and I wish I would have kept it. Of course I wouldn't have been able to use the wah in front of the amp and its volume pedal capability in the loop at the same time.

You may want to (re)read what I wrote with respect to LP's volume trick. I used an early-90s Morley on my 4100 and it failed to moderate, going from silent to buzzy/muddy clean, to just about as loud as the amp on its own. If a Morley works on your amp like it works on mine, it would only be good to take a "slight" edge off the dbs for a gig setting, not turn an overdriven halfstack into something managable in a residential area.