A while ago I bought a 4x10 Avatar 8-ohm cabinet and an Ampeg SVT-3 PRO head. Didn't like the Ampeg distortion so I sold it and kept the cabinet. Now I need a head and the more I see, the better idea it seems to buy a power amp and a preamp instead of a head. Am I correct in thinking that a preamp + power amp = a head? This would be a great solution to my problem of more power costing more money. Any insight would be greatly appreciated!!