Sorry for the delays... This is a tough one to nail down but we are just about there. It is looking like dimensions will be ~ 10.5" high x 5.75" wide x 6" deep (not including grille).

Attached is a quick render comparing the front baffle of the Sierra Sat vs Sierra-1 / Sierra-2

render1.jpg

Cute little bugger -- should end up being -3dB at around 65Hz.