Hi everybody. Been lurking for a bit, and got stumped looking for info on this amp. I looked at the Randall page for a manual, and I could find all kinds of RB-series amps, but not the 1500. Google searches leave me dry, so I figured someone here might know where I can find some details on this. There's no impedance value marked anywhere on it, as an example of how little documentation I have on this thing. Anyone know anything about this thing?