You're welcome!

OK then, unless the cabs can be quite large, 'we' can't go any further till you have actual T/S specs on all four since what's published at GPA can allegedly be far off enough to ideally require [much] larger cabs.

This is a problem because? I mean the ideal is getting the woofers to be in a room's vertical odd harmonic plus the performance can 'feel' more 'you are there' when the speaker's acoustic center is in the face/chest area.

Regardless, if there's enough depth available this can be an advantage in that more acoustic path length is available by folding it ~ in half since no matter what the woofer cab's configuration, the horn must be in a separate space to allow max TL loading of the vent, be it open on top or in a massive sand/whatever filled sealed box.

Trust me, assuming a typical HIFI/HT app and a proper drain/rezap back to spec, you can't heat up these big AlNiCo motors enough to drain any audible amount out of them over time unless you plan to live at least another 64 years of daily use with them max EQ'd to get the most output from them at hearing damage levels. I mean look at how many years of cinema sound apps running the better part of 12 hrs daily, sometimes more, it takes to flatten them since their low power VCs can't 'sink' enough current for any length of time without acting as an expensive fusible link.

Indeed, the 'beauty' of AlNiCo versus ferrite [mud] motors is that one acts as a heat sink, keeping performance more efficient over time while the other is an insulator that quickly goes to thermal power EQ/distortion for a more linear performance over time. It's obvious then that it's better overall in a prosound app and not so much in a HIFI/HT app other than a separate sub/LFE system.

The real danger is causing them physical damage since it can alter their performance, ability to restore them to anywhere near spec.

GM