I know that's a weird configuration, but I've got a Vox T-60 bass cab I'd like to put new speakers into and it takes a 12" and a 15". I'm using a GK 400RB-III, which is 280 watts into 4 ohms. I'd like a nice, clean, punchy type of sound. Can anyone make any suggestions? I am especially having a hard time finding 12" bass speakers... Thanks!