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Original Message

RE: behold, a Raal ribbon DESTROYS a resonant B&C horn

Posted by hollowboy on March 6, 2017 at 21:52:55:
"just LOOK as those two waterfall plots! it's not even close!"

2-4kHz, the horn produces 108dB.
2-4kHz, the RAAL produces 87-90dB.

To properly compare them, you'd have to give the RAAL 100x as much power as the B&C.

The B&C waterfall plot has a 30dB vertical axis.
Over 2-4kHz, the B&C covers almost the whole vertical axis
The RAAL waterfall plot covers only 26dB.
Over 2-4kHz, the RAAL covers 2/3 of this; about 16dB.

The B&C plot therefore gives about 12dB more detail.

To properly compare them, you'd have to ignore the bottom 12dB of the B&C plot.

So yes "it's not even close"

"a resonance around 700Hz"

That's below the horn's cut off frequency. That's much lower than the RAAL can play.

"and a hideous resonance around 17kHz"

You are too old to hear 17kHz.