They are the newer mb cabs.
I really love the way they sound, even though they are 4 ohm cabs and the amps min load is 4!
Thanks to some fancy wiring, it all works beautifully!
I got them a few years ago now very keenly priced when I had a partial Marshall deal
My tech is well built (now!), and quite young too!
He also has a sack barrow ;-)