Are these really smaller than the AV40s? I find that hard to believe.
Dimensions in inches HxWxD
ADAM A3X - 10 x 6 x 7.5
M-Audio AV40 - 9 x 6 x 7.25
So. Yeah. My bad - The ADAMs are actually an inch taller. They seemed smaller to me because they have front as opposed to rear ports and all the controls are in the front panel so I find they are more convenient to position.
The point is there really isn't much in it. The AV40 go down to 85hz flat vs 60hz for the ADAMs. Decent deal for an extra vertical inch.