I've played it side by side with the 500. A much rounder sound. Dialed in the midrange just to my liking in 20 sec (different on each channel since I send organ through Vent to one channel and pianos to the other).
I am assuming (and hoping) that you are saying that the 612 S has the rounder sound?
Does the 612 S have the rear ports to help spread the sound around, which are unfortunately missing on the 408S?
Cheers. [/quote
Yes, its the 612 with the rounder sound.
The ports on the 612 are no longer on the back, but on the front (I guess under the grill). I assume that to be the case with the other two new amps as well. I was speaking to Jeff at MS and he was saying that helps to provide the in your face sound it has. I agree, except I, too, liked the rear ports on the 500 to allow a bit of sound to be projected behind the amp for, perhaps, the drummer.