my RM4 quite some huge hum noise

[Hot Rod]

there's quite some huge hum noise when my RM4 is set at high gain module, specially at Ultra Module mode, is this normal? needing for repair?

 

[3 Mile Stone]

Does the RM4 have the ground switch on te back like the Egnater M4? Check that if it does.

 

[okstrat]

Yep, they sure do.

 

[maximus1]

what about an rm 100 head, mine has mechanical type hum feedback noise that my gate can't quite eat up without losing too much tone.is it a ground issue?

 

[Hot Rod]

Yes, I did try the ground switch on te back,but it's all the same, and I even use Monster power pro 2500 Power Conditioner , and change all preamp tubes new,but it's still the same problem, I use PRS singlecut,stock pickups, Monster cables, VHT 2502, Marshall 1960A cab...is anyone know how to reduces this noise or is this hum noise is normal on any rm4?
:roll:

 

[c2ply]

For a while I had a ton of hum in my setup (RM4, ensoniq DP4, DSR-1, GCX, a couple of pedals, Korg DTR-1 - out of signal path, and a VHT 2/90/2) - and finaly figured out that I had a ground loop in the rack. I probably could have checked every cable and built custom audio cables with the ground lift, I was pretty sure it was due to the Korg tuner, GCX, and RM4 not playing well together, but ended up putting a Axess BS-2 buffer/ISO box (using the ISOLATED output) and the rack has been silent ever since.

 

[Hot Rod]

This is how i setup my gears, I simply plug Guitar->RM4->VHT 2502->Marshall 1960A
there's no effector, processor or tuner connected, but there's still noise. I even use Ebtech Hum X, yet it doesn't help a bit. Is it call Ground loop noise?

Are you people having the same problem with the hum noise when RM4 is at High Gain Module?