Far as I know, there are only two Servo 15's. Well, maybe three if you count the Signature as a different model. Cosmetically it is much fancier lookin cabinetry than the standard model, but the guts are the same.
Don't know all the differences, but I do know the driver is different from the v.1 to the v.2. Also, I think the v.2 has a much more powerful amplifer - but I'm not positive on what the numbers are.
Don't know all the differences, but I do know the driver is different from the v.1 to the v.2. Also, I think the v.2 has a much more powerful amplifer - but I'm not positive on what the numbers are.