Norris Wilson wrote on Sun, 24 May 2009 12:40 |
Regarding the 3kHz collapse of the vertical beam pattern created by the 40 degree angle of the horns that you use in your designs. I am wondering if the size of the throat of these horns, the H-290 being 1" as a example, have any effects on this 3kHz beam-width collapse point? |
Norris Wilson wrote on Sun, 24 May 2009 12:40 |
As you know, I have the Beyma constant directivity TD-250 1" horns with 90 degree by 40 degree dispersion angles. There is a bump, or slight rounded over protrusion with a flat side that is positioned on each side of the throat of the horn. This protrusion is positioned about 1.5" in front of the horn throat where the CD attaches. Would this protrusion be a diffraction slot that you feel introduces discernible distortion in the bandpass? |
Norris Wilson wrote on Sun, 24 May 2009 12:40 |
Taking the Four Pi design as an example using the JBL 2226 as the woofer, and Eminence H-290 as the horn mounted in the baffle per your latest version. Could an 8" to 10" diameter midrange driver that is baffle mounted above the treble horn, and crossed in around 250Hz to 300hz from the 2226 with a shallow sloped filter, be retrofited to work properly under your design premise using the vertical nulls? I guess you could say this would be a W-T-M vertically stacked baffle arrangement. |