I want to get an Ampeg B-2R 350 watt@ 4 ohms head and run it with a QSC RMX 850 or 1450 power amp (and probably a rack tuner in there too) into an Ampeg BSE410HLF 4x10 400W RMS or 800W program. Would this workout? Would the power amp give me more overhead and would they all run together through that cab? These are the cheapest, best units I could find. Please help, I don't really understand the whole ohms/watts/power amps situation. Thanks.