Ran one for years with the stock speakers, using the full range input so that the cab's crossover handled the crossovering. Worked fine. You could try biamping with the amp's crossover, or the cab's, and see what you prefer. I think the previous poster was just referring to cabs that have had the drivers changed, though I don't know if even then it's a terribly big deal.. wouldn't the crossover still split the signal at the same points?
I like the cab. Heavy, but sounds good and will fit in a medium sized car (well, I seem to recall it fitting in in a mid-90's medium sized car anyway). Also played another one for years that had speakers pulled form Mesa Diesel cabs, that one sounded nice too but quite as low, or as high. I doubt the speakers were a match for the enclosure, but the result sounded pretty good.
The stock 10s are basically guitar speakers
AFAIK. The ones that were pulled fromt he modded cab ended up being used by a guitarist as such, and sounded great.
There were different models of Isovents. I don't exactly recall the designations. SVT-50..-He, -DL, I think. The 2 I have experience with are ported differently; one has 2 round rear ports, one has 2 front ports in the baffle holding the 15s. I think the speakers differed as well.
What's it worth is up to you. Don't know what the bass is worth. The cabs aren't collectible, and are too heavy to be desirable in the current lunchbox amp driven market. I think I paid $350 for the rear ported model a few years ago, a few tears but in nice shape otherwise, at a GC sale. It had been sitting for over a year, they finally got desperate enough to sell it for less than they paid for it just to free up the space for the incoming then new GC brand Acoustic stuff.
Only thing that's ever blown on me was the tweeter on one of them, twice. Once under warranty, once not. On the 2nd one I knew better and never used the tweeter.
