Ive owned an rm100 and now own 2 RM50's.. you GOTTA. Turn the master volume up to at least noon or the amps power sections just don't respond right. It's like running the volume controls low on your power amps... they gotta be turned up
I also couldn't deal with the 75 lb weight of my 100. I ended getting 50 watters which i like even better and they have a good built in reverb....and they weigh 35 lbs!
also try using some. JJKT77' S OR KT66' S...GIVES A MUCH BIGGER SOUNDSTAGE with better frequency response all around. If you want an even bigger tighter bass get some KT88' s. And you really should try a few modded preamplifier modules. Jaded faith's, gigmods, salvation and sacred groove stuff is amazing.