Thank you very much for taking time to help, Brad.

Am looking at one of these heads, never played one. Wondering how it compres to the RG100ES? Have only been able to listen to one on youtube, and you know how that can be. Anybody here have one and what are your thougts about it, pros and cons, so to speak. Thanks,Brad

Thank you very much for responding. I am familiar with the volume drop you speak of, I also own a '87 model RG100ES with the treble pull knob and the volume definately drops on that when I pull it out, but this XP models volume doesn't drop for the first 10-15 minutes of play, then it will become much quieter but with the same gain structure and while playing will jump back and forth ( loud and quieter ) about every 2 or 3 minutes. It happens with or without the footswitch plugged in and with or without a patch cable in the effests loop. THANKS AGAIN, Brad

Hey guys, this will be my first post. Have the XP version of the RG100ES and everything works fine with the head until you switch on the sustain/boost switch. The volume will begin loud and after awhile it will become much quieter and then get louder again, if you push or tap on the switch while it's quiet it will get louder.Has anyone ever run into a problem like this with this type head? Thanks for any help in advance!! Brad