The Last Bass Outpost

The reason for the front and rear facing speakers is to get direct and reflect off the back wall frequencies, which helps with harmonics and allows the length of the bass wave to develop.  Also, you could place the amp in front of you and have the rear facing speaker act as a monitor for you while you play.  I've built other cabinets using similar design and it works really well!  I get some really deep clean sounds, with the direct/reflect speaker placement and the phasing does pump more air that way, in spite of other opinions.

I have both the B1 single space rack amp and the 2-12 cab with 3 rack spaces for the gear.  It works and sounds wonderful.  I don't have a lot of "time"on the tubes either, neither piece has been gigged, and both are almost like new.   Actually, I would be willing to sell them, if anyone is interested because I have other rigs, that are more portable, and the cab is pretty heavy because the speakers have massive magnets and the wood in the cab is heavy. I live in North Carolina, near Greensboro, so give me an email or reply if you have any interest.