i have a spare cab laying around with no speakers. if i plopped in 2 speakers on the, say, bottom 2 speaker holes, will the cab act as normal but only be a 2x12 as oppose to 4x12?
it'll work. may not sound as tight since air will be coming out the empty speaker holes.similar to an open backed amp, like a fender twin or something. and yea, just watch your impedance so you don't fry your speakers or your amp head.
Just make the wholes you aren't using with a donut shaped piece of wood and just call it an over sized ported 2x12.