So to keep the amp from frying, do you take the amp head's wattage, then try to match it with the cabinet's speaker wattage? I heard you devide the amount of wattage by how many speakers there are in the cabinet, then see if it is the same as the amp head's wattage. Also, is less wattage then the amp head going to fry the amp, or will it not effect it?
its best to get a cabinet that can handle the same amount or more wattage than the head. I myself have a 120 watt 6506+ going in to a 300 watt Marshall 1960A cab.
Ok thanks for that info. I have another question. Is a preamp required for the head and cabinet?
a preamp is built into the head. A head consists of a Pre-amp and a Power Amp.