Hey everyone, recently I have been thinking about trying testing out these 2 heads. First of all, if I were to purchase one of these heads, I would be going form a gallien krueger 400rb (about 250 watts which just doesn't cut it for my band) to 300 watts. I've heard that the ampeg head can get crazily loud but with only 40 more watts than my old SS head, will I get the volume increase I need? I know tube amps are a bit louder.. Also what are the main differnce between these to heads? which one is better for a loud, mostly clean, flat response tone with a GL jazz bass and a musicman stingray. Please tell me your experiences with these amps and what one you prefer.