Going back and seeing the build and profile. The AC4C1 has the same preamp as the Ac10 and Ac30S1. 2 12ax7 and top boost tone stack and the construction is no better than the AC10 which IMO is good. Its the same as the bigger ones just smaller and IME with the AC15 this thing gets closer to the jangle cleans and OD tones at a lower headroom yes but can get practically as loud and weighs 25 pounds or so and I can easily carry with one hand. Main thing for me is the tone at louder volumes and for me it handles high volumes pretty great and in some cases better than the AC15 thanks to the higher rated speaker. Lows dont mush out, highs are not overbearing and the amps tone still retains its substance at higher volumes. Just wanted the AC tone in a smaller package but be able to play in a band or venue without being mic'ed. I wasnt looking for a bedroom amp. I was looking for a small, easy and ready to use gig machine and IMO this thing delivers....and can pull of the bedroom thing too. Cant wait to finally pick it up in 2 or so weeks!!!