High-efficiency, wide-range midrange?

[freddi]

Audio Nirvana stamped frame Super 8 in a pipe and on-axis - off axis things will drop

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Pioneer "BOFU" vs Fostex 206EN on-axis

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"BOFU" vs Super 8 on - axis

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FE206EN vs Super 8 on-axis

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Alpha 6A is a tough and low distortion driver - Art's setup should play loud

Alpha 6 on a conical horn - other trace is an alnico JBL LE5 on Bruce Edgar's rectangular tractrix horn

On and Off axis

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On axis

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[sfdoddsy]

The BG Neo10 planar will cover this range. Run two in parallel and you'll get that kind of efficiency too.

Stick them side by side for the equivalent of a 10" driver, or vertically for better horizontal dispersion.

 

[5th element]

plenty of 8" drivers do that (fostex, lowther, audionirvana, seas) , not sure if there are other constraints implied here.

Yes, but off axis will be a nightmare.