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Original Message
RE: Stacking them would decrease the vertical dispersion angle
Posted by djk on February 20, 2012 at 23:42:15:
"it would seem to suggest contrary findings to those of the EV bulletin."
Why would you think that?
It is not even on the same subject.
The JBL note shows three stacked horns with no aiming, and running full-range signal through them all.
Please explain how that would be relevant to three stacked with the top horn aimed down, the bottom horn aimed up, and only the central horn with HF EQ?
Can't you figure out that the JBL three-stack at 1Khz looks like the single horn at 8Khz?
Can't you figure out that the JBL three-stack at 2Khz is starting to narrow and show secondary lobes because the horns are without tilt?
Can't you figure out that the JBL three-stack at 4Khz looks like it is excessively narrowing and showing strong comb-filtering in the vertical plane?
Can't you figure out that an EV style three-stack that rolled-off the outer horns wouldn't be narrowing excessively or have the lobes, but would in fact look like the single horn pattern at HF (because only the single central horn is running)?