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Hello people!!
What would be the approx. frequency range of a Heppner 4" x 10" horn-loading driver?
Also, would anyone the resistance (8, 12, or 16 ohms)?
Any help would be GREATLY APPRECIATED!!
THANKS!!!
Follow Ups:
HiWhere did you get a 4x10 Heppner horn????
I had some once and knew the engineer, being an easy drive, went there a bunch of times.
Some of the horns were called a “Dorms”, Heppner made these horns for Cerwin Vega who eventually bought Heppner, disassembled it and closed it up.
They have been out of business for 20 years ?The engineering shop had a “cute helper” and they had a home made magnet charger who’s coil was wound with copper tube filled with water and powered by a steel rack full of series connected car batteries with a giant knife switch.
Pretty cool, I had a pair of 4X10 Heppner horns under the dash in my 64 Chevy, made my Motorola 8 track sound nice in 1971.
This was well before I had any way to measure anything so I can’t tell you how high they went.
Do you have any way to measure them?
Hope that helps,Tom
It was Klipsch that bought the tooling after Ray Hepner died.The dhorm became the tweeter for the KG2, the 4X10 was the basis for the KG4. The 1-1/2" mid became the mid for all the models crossed over 500hz.
Tom, you have taken me back to my first hi fi awakenings in the late 1970s. I had bought a pair of Rogersound Labs 3600 three way "Monitors" (JBL knockoffs) and thought I had it made. Then my friend Craig brought his Cerwin Vega R-12 12" two ways with the Dhorm tweeters over for comparison. They had much more apparent stompin' disco bass than the RSLs... damn! Then began the quest to ketchup which persists to this day.
I bought a PAIR on e-bay for $10.
I have a real love-hate relationship with e-bay.
Either I'm scoring great deals...like those Heppner horns.
Or I'm buying a "mint" receiver.....that shows up DOA!?
2K to 14K useable.Cannot handle much power (10 watts)at 2K first order so it would be best to cross them over second order at about 3K or above. For some, 14KHZ is high enough...others want to extend out to the strotosphere.
Very transparent horn actually but suffers from lack of high power capacity.
Thanks for the information!!
14K, huh??
I can live with that.
My old Avid 100's top of at 16K.
They go a lot higher than they look like they will go. They have basically the same type diaphram as the t35 EV.
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