I run a Backline 600 into a GLX410. So since that cab is 8 ohm, I'm getting what, 150ish watts out of the Backline? Needless to say, it isn't all that loud. So I have four options: Option 1 - Add another 8 ohm cab. (caveat, the glx410 already weight 100lbs.) Option 2- Replace the head with something that drives more to 8 ohms, probably a LMII or Shuttle 6.0 Option 3- Replace the cab with something at 4 ohm, probably an Avatar 2x12 Option 4- Replace both cab and amp for something more powerful and 4 ohms. We're looking for a bang for the buck scenario. I like the GK tone, but honestly it's all I've ever played through.