finally spent some quality time w/ this cab last night. Tried it w/ guitar using 2204 Marshall head and a couple different guitars/baritone and man it does a thing. I think a lot of you folks w/ your love of the really harsh tones that FM The Great Leader is known for would really gel w/ this as those Altecs are shockingly bright and can do that ice pick thing like you would not believe. But the cabinet itself isn't thin per se, still feels like a full sound but can end up sounding fizzy if you aren't dialing back some of the treble frequencies.
Definitely excels for bass. Multiple heads, multiple basses. Huge, monstrous sound and that high-end response really helps it cut when playing w/ distortion. I don't usually love a lot of treble w/ bass but this seems to respond in a natural way to eq and the bass itself: it's there if you want it and can roll it off easily if you don't.
Love this thing & plan to use it for recording/practice but if I ever move it'll stay w/ the house because JFC it's a monster.
updated photo, lookit me I'm a Red Fang