I have a fairly well-used SVT610HLF cab, on which both Speakon sockets have finally stopped locking, so I guess it's time to replace them. While I'm in there, though, I had an idea for a mod.
I run the cab with an SVT-7PRO head and am constantly paranoid about damaging the cab, given that the head's nominal output is 1000W and the cab's only rated to 600W. Also (and this is more a wishlist item), it'd be nice to run more than one cab simultaneously should we play in a venue big enough to do so (it's an AC/DC tribute, so more cabs are always better), but the cab is 4 ohm - as is the minimum load on the head.
So, given that the cab runs 6ohm speakers in 3 parallel groups of two (12 x 12 x 12 in parallel gives 4 ohm), it occurred to me that I could re-wire into 2 parallel groups of 3 - 18 x 18 in parallel would give 9 ohm. Not the ideal 8, but close enough and the head would only be putting out 500W at that impedance, or 1000W into two cabs if I mod another one similarly.
So what've I missed? This seems just a little too simple, somehow...
And no, I don't want an 810E. Or at least, I do, but my back, the guitarist's back and the boot of my car say that's not a good idea.