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In Reply to: RE: I haven't looked at this stuff in years, I'm re-learning a lot posted by Bill Fitzmaurice on January 09, 2024 at 05:18:26
The Kappalite 3015LF seems like a possible candidate. I might fool around with some old fashioned graph paper and see what I can come up with
Back for a bit again. Ignore me if you like.
Follow Ups:
The 3015LF is a great subwoofer driver, for pro-sound folded horns. IMO and IME it makes no sense for use in the home.
which should be sufficient in a home setting
Looking at folding, I think I can make it a fairly easy, if somewhat space inefficient build. No folds over 90 degrees, roughly 36" wide 40" depth 74" height.
Still learning...
Back for a bit again. Ignore me if you like.
It is my understanding that at 125db you will suffer immediate permanent hearing loss.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
"It is my understanding that at 125db you will suffer immediate permanent hearing loss."
It wouldn't be pleasant, and with extended exposure it would cause injury, but it wouldn't be immediate. One wouldn't listen at those levels anyway. If you think it seems like a good idea clearly you've never experienced it.
Walked out after a Foghat/J. Geils concert ended in the 70's. Festival seating, so we were right down front at the old Civic Arena in Pittsburgh.
Go out to the parking lot, and noticed my ears were ringing, and it sounded like cotton was stuffed in my ears. That was in my 20's, and I'm 72 now with tinnitus.
Like they say:
"Too soon old, and too late smart"
mg16
I've been in bands since 1965, worked the FOH at a major concert venue where 110dB was the average for three years. My hearing tests fine, with an upper limit of 12kHz, which is normal for my age. I spent a lot of time shooting too, back in '72, when no one wore protection. If anyone was going to join the Pete Townshend club it would be me, but somehow I've managed to avoid it.
115dB is sufficient in a home setting. As for folds over 90 degrees, it doesn't matter with a sub. Reflectors aren't even necessary so long as the bend to bend distance is less than 1/4 wavelength. For that matter you can use 180 degree bends up to 2kHz, but only with fully rounded bends.
I'll see if I can get a diagram together and will likely have a lot more questions
Back for a bit again. Ignore me if you like.
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