About a year ago I bought an Acoustic 470 on Craigslist. I used it for about three weeks and then it sh!t the bed.
I finally got it in to a tech for repair and holy hell am I glad I did! I don't think this amp ever worked right. It's way louder, and just... thicker than I ever remember it sounding.
I've got a gig this Saturday and I can't wait to use this thing on stage. I've never had the chance!