My RM4 sounds sorta Crappy..what could it be...

[GtrGeorge!]

I was recording and I noticed it sounded kinda weak like a bad tube in a given module..but all 4 sounded kinda crappy....the sound when tubes go bad. Spitty. Is there a tube in the RM4???
I see the tubes in the undividual modules..but is there one in the rm4 itself??? Anybody else go thru this or something like it?? Any help appreciatted.

 

[m0jo]

If all modules are affected it's not likely that it's the tubes in the individual modules.
There are 3 tubes in the RM4 itself, you can try replacing them if you have spares.

But first, I'd suggest bridging the series loop with a patch cable, a dirty jack socket can also cause this the bypass on the loop to get a bit iffy. Also try both the front and rear input, for the same reason. If any of this solves it, the low-tech solution is to just plug in/out a jack in the offending jack socket a few times (actually cleaning it is best ofc. for the long term)