Rerurn to Romy the Cat's Site
In the Forum: Horn-Loaded Speakers
In the Thread: It's might be another project...
Post Subject: Rebel and answerPosted by a.anagnost on: 11/9/2024
Rebel:
It seems that the Rebel was licensed to companies such as Cabinart (offering 3 sizes of the Rebel):
https://www.preservationsound.com/wp-content/uploads/2012/06/Cabinart_1957_part2.pdf
https://www.preservationsound.com/wp-content/uploads/2012/06/Cabinart_1957_part3.pdf
Apparently, all of them follow FIG.1 of the Klipsch Patent https://patentimages.storage.googleapis.com/f0/9b/b3/3d80597554398e/US2731101.pdf, but Rebel++ is more refined at the back providing a more sensible throat geometry.
Unsurprisingly, it was common those years to license designs to other companies (for example, Vitavox CN-191 was using the Klipschorn, Vitavox Scouts were using the bogus JBL 4530)
Measurements:
The obvious answer is: move the horn to your backyard, place it firing to the sky (and... call your doctor to fix your broken back).
I usually use MLS (Maximum length sequence) pseudorandom signal to extract the impulse response of the device under test. (The FFT of the impulse is the frequency response)
The methodology is explained at https://www.audiomatica.com/wp/wp-content/uploads/cliomls.pdf - example section.
(A few 100y ago, when I was developing an RTA app I sent you a prototype that supported MLS generation/measurements. I suppose it may still run under windows 11 - I will check if you wish)
It might also be useful to measure the resistance of the Rebel++, as a possible hint to why various amps fail.
BR, Antonis
Rerurn to Romy the Cat's Site