I used one of these back in the day. It had Delightful lows. I put the fridge on it's side and it would be a nice place to sit (or to let chicks sit!).
However, I think the freq response on it only goes up to about 1k.
That's odd, cause the single 15" cab supposedly goes up to 3k. Though, whether those specs are believable...
I think the main reason the SVT 215E might not have sold was simply because of how damn big it was. It's pretty immense for a 215.