OK, so I need to put some speakers in this unloaded 2x10 cab which I intend to use alone as my primary bass speaker.. and I'm having a little trouble pulling the trigger on some of these expensive drivers without fully understanding whether they are a good match for the cab. It's a Carvin V210 cab -- I have found multiple instances online which refer to this model as a "vented" cab, saying that it is vented in the rear. I'm pretty sure I understand what that means, but from what I can tell the cab is not vented anywhere, but rather, totally sealed. So I must have a different version of the cab, yeah? So basically I'm throwing out everything I've read on the thing and starting from scratch From what I've gleaned so far, I can use WinISD to reverse engineer the cab to determine whether a speaker is a good match, based on the internal volume. I have tinkered with the program a bit but have yet to figure out how to do anything in that direction -- it seems to be designed for building a cab based on the speaker's specs rather than the other way around. I did measure the dimensions from the inside when I last had the grill off, which are 12.5" x 12.5" x 23.5". I don't know whether I also need to make adjustments based on other factors (such as the insulation material lining the internal walls, or the recessed handle that takes up a little bit of space inside) or if those numbers are close enough to get what I need out of them.. As a side-note, I have an opportunity to get a decent price on a pair of Deltalite II 2510 drivers, though a decent price on these is still pretty dang expensive at this point. I'd definitely like to shave some weight off the thing with some neo drivers, but finding a good match for sound purposes is my primary objective. I'll be powering it with 200 watts @ 4 ohms. Thanks for any thoughts you care to share!