Means nothing to me lol :-), it says 8 on the jack plate so that's what i've been running the OBT at with it nothings gone bang yet so i'm assuming it must be 8, i may be wrong about the 12 individual rating though, Tayste had a thread somewhere about the cabs, they were available in either 8 or 2 ohm rating, i'll see if i can find it & check the ratings.
Found it,
[url="http://basschat.co.uk/index.php?showtopic=105596&hl=matamp+6x10"]http://basschat.co.uk/index.php?showtopic=...;hl=matamp+6x10[/url]
Here's a pic of the plate, dunno if it helps any though?,