Since my Avatar B410 up and left me (see sig.), I've been thinkin' of what I'm gonna get to replace it. Luckily I have no super-steady gig right now. I think the Yorkville XC115X might be perfect. I've always wanted to try a 15" anyway, and this one's very light and small. And quite stylish, I might add. The only problem is that it's an 8-ohm speaker, and I really wish it were 4-ohms. I don't play super loud, but my SVT-3 through the 8-ohm 4x10 occasionally ran out of power, and I assume that switching from a 4x10 to a single 15" will lose me some volume anyhow (though I haven't done any math yet). So my question is this: can I buy the Yorkville, and later, if I decide I need to, replace the 8-ohm speaker with a 4-ohm speaker? Or is each cabinet specifically designed for a certain type of speaker? Even if it's acoustically feasible, would it be practical? Would I have to fill and re-drill holes in the cab to install the new speaker? Sorry that's so long. I really have no knowledge of electronics once they get to the guitar's output, so this might be a very dumb question, but I'd appreciate any help or suggestions (even if it's a different cab!).