Ok, so I was fooling with the BAM 210, and it has a "1x15 fliptop" model on it. What exactly is a "fliptop"? I've heard of "tilt back" but never "fliptop"...
"Flip-top" is a type of combo (usu. Ampeg) where the amp is mounted on a "platform" and secured with latches to the cabinet proper. It could be "flipped" over for transport. It sounds like the BAM has some modelling for a flip-top sound. The Ampeg B15 was real popular in studios in the 60's and 70's. I think James Jamerson used one.
Interesting... It sounds kinda cool, actually... What's tonally gained/lost by this, though? (no need for the tech talk, just "it makes your sound more punchy" type of stuff. )
Definitely punchy....ummm, "up front"? I don't think the flip-top trick added that much to the tone. I've got a couple Mesa tube heads, but find myself always goin' back to my B15-R. Love that thump . Keep an ear open next time one of these tunes comes on an oldies station (list). Probably Jamerson with a Precision through a B15.