OK, so I just posted this on another forum, but Im interested to see what thoughts John might have on this –
One thought I have had is of a sort of Isobaric IB design. I think I can only create enough cabinet space to give me 4 x the Vas of 4 drivers. Power is a non issue as I have a 4 channel power amp that can give around 1KW per channel and I dont need anything like that kind of power. Isobaric should have the approximate effect of doubling the internal volume of the cabinet, or rather halving the required cabinet volume required. The net result should mean I end up with roughly 8 times the Vas in terms of effective cabinet volume. If I can only use 4 drivers anyway, then I go to pondering on using the other 4 by implementing the isobaric design. This should lower system Q for a given internal volume, and the extra power needed is a non issue as these drivers only need 50-100 watts each anyway. I realise I would essentially be limited to what is a 4 driver system, and potentially only a dual sub setup if I end up with a pair of opposed manifolds. In theory, the design could work though, but I know of no one thats ever tried anything like this and think that potentially the results could be a mystery. I kind of like the idea of doing something totally unique though, and I could even mount the drivers facing each other so they operate in a push pull alignment. Theory suggests this sort of setup would give me the most accurate sound quality and bass response imaginable.