I asked the same question when I ordered mine. I feel like a vetran now!

The answer from CB919 was:
Just shy of 9 inches wide by 5 inches tall - about an eighth of an inch shy in both directions.

snazzed

M22, VP150, QS8 <--all v2
Sub: Outlaw LFM1-Plus
Denon AVR1910, Sony X900-65"