I can’t seem to find out what the differences are in the IB12 vs. SPB12 (SBP?).
Basically what I’m hoping to get is an infinite baffle 12″ for automotive use that has good authority at 30hz but will cleanly play to about 500hz. I only need up to about 300, but 500 gives me some wiggle room on crossover selection.
Essentially I’m wanting to replace two 8″ IB midbasses and a dedicated sub with 2 speakers 8)