I have not decided if I will use two woofers per box yet like the JBL 4435 or a vertical array like the 1200fe box 4313B posted.

I need to do some room response models and some measurements to try and assess the true room gain below 100 hertz for this system.

At the end of the day if I need to provide for example - 3 db of downward equalisation contour below 100 hertz due to room gain for a relatively smooth bass curve (with the box near the rear wall) this will mean a reduction in cone excursion limts and distortion.

By way of example I recall hearing Bo's 4345 that had been setup nicely and the bass for not exagerated but was smooth and articulate.

Obviously the E2 with dual woofers was an all out effort for massive dynamic range but common sense prevails in terms of the room size and what will give the best overall results.