I was reading this post (very helpfull) and had a question. Will changing the Qes or Qt by wiring for 4ohms change the sound. My pe-87 16 array sounded lifeless, wired for 8 ohms. 4ohms was to lively and 6ohms (12 drivers) seems just right =; ). I have them open baffle and the amp is .1 ohm published.

You wrote,
If you have to increase the sensitivity, then wire them for a lower impedance (a 4 ohms array would yield 3 dB more sensitivity or slightly more than 95 dB SPL).

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Linc