"William Sommerwerck"
To quote Cary Grant... "You are discussing something you know nothing
about."
This thread should have ended with the second posting.
We know nothing about the driver design, the crossover design, the bass
alignment, etc. Without that information, it's all speculation.
** The schem of the x-over for the 8 ohm version is he
http://yorkville.com/downloads/other/smpulse.pdf
A 4 ohm version would need a 4 ohm ( nominal ) woofer, 8 ohm ( nominal)
compression driver.
The boxes are bound to be the same and ( electro /acoustic) efficiency ought
to be close to the same - ie dBs per watt per metre.
The 4 ohm version should deliver +3dB SPL if fed the same test signal.
..... Phil