Hi All, I have been playing with my IMPs lateley and am very satisfied...kind of.  Mine are the old corner style that have all EV drivers, horns, and xovers.  I have them flipped up side down with the woof up on top and the sub mouth unloading on the floor.  This helped somewhat with the mid bass, but I am just not getting the sub bass responce I'd hoped for.  The woof in the EV SP-15.  I am replacing the EV horns with the PI midbass horn which will go from 350hz to 2000hz, then the PI midtweet horn which will go from 2000hz to 8000hz, then the big bi-pole Heil super tweeter from 8000hz on up.  So, I need to replace my EV SP-15 woofer the can go from 350hz down to ???? as far as possible and really work well in the IMP cab.  Any and all suggestions are greatly welcomed.  I've read a number of post about drivers for the IMPs,  but all I can find are geared toward the moderen version.  Cheers and thanks in advance.

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