Well, i'd like to add a Mesa 15" cab to the 1516 once i get the new amp. But i've always been told that running a 4 ohm cab and an 8ohm cab is bad. But lately i've had a couple people say it's fine, as long as the amp can handle a 2ohm load. So, if i used a Mesa/Boogie 400+ could i run the 1516 (4ohm) cab and an 8ohm 15" cab (either Mesa or SWR) fine? I'd use that to gig, and just take the single 15 to band practices. Can anyone just quickly clarify that for me? Will it work fine, just like it was running at 2ohms? Thanks.