| Besides the price differences (substantial) and the name on them (some people's noses wrinkle) - I really appreciate the Ampeg, but bought the Acoustic.
I don't tour nor do I want to - I play for free or beer and steaks most of the time, so I'm not trying to wow the fanbois with a brand name that they recognize as the be-all and end-all of the cabinet question.
I like the old school voice of Acoustic gear and own quite a lot of it in a few different forms.
It may sound odd, but I think the Ampegs are kinda shrill - maybe not to painful levels, but there's something that I don't hear in them that I would like. Maybe it's too sterile or unprocessed - I dunnow.
I tried to own the Ampeg 810, and even though I would sacrifice looks (shudder!) and use an odd-looking cab with all my other Acoustic gear if it sounded as I wanted, it didn't make me happy and I bought the Acoustic B-810 instead.
For kicks, I tried the GKs and Fenders and even an older Peavey (it was about as nice as I wanted, but it was used), and none of them met with my approval.
What I'd like to do someday, is to try one of the new Acoustic refrigerators/folded horn units and see if it's decent enough for me - but Holy Cow!
The new Acoustic prices are outstanding!
(Which is where I'd sleep if my wife found out that I paid for a car with the cost of one. I'd be 'outstanding' in the rain and snow.)
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Play a Thunderbird? 
I'd rather give my cat a suppository  |