thanks Allen, im new to these horn things, and i see that many use them below resonance; but i wasnt sure about below cutoff.
In the plot from the spec sheet it looks like cutoff is at 700Hz. The important thing is that they (and drivers like them) will still go to good domestic levels and can go a long way with 250mW crossed this low.
Also a shot of them on a horn (90 degree conical with 16.5" mouth, elliptical throat). The driver appears to change behaviour at around 2k5 but it sounds good down to where it rolls off as long as it's well and down at that point.
Also a shot of them on a horn (90 degree conical with 16.5" mouth, elliptical throat). The driver appears to change behaviour at around 2k5 but it sounds good down to where it rolls off as long as it's well and down at that point.
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ah. That clears things up a great deal. Thanks. My current plan is to cross at around horn cutoff, either 1st or 2nd order in combination with the horn cutoff, hopefully negating any cutoff peak that may present itself. Having said that, my horn is more waveguide-like, 6x5inch mouth path length of around 3.5 inches, so i dont expect much gain. Hmm food for thought, thanks again.
The Celestion Horn is usable to 2000 Hz.
Some measurements of the H1-7050 with
blue: BMS 4524
green: Faital HF104
red: Celestion CDX1-1425
Some measurements of the H1-7050 with
blue: BMS 4524
green: Faital HF104
red: Celestion CDX1-1425
Thanks! Thats a lot more info than i was able to find. Interesting that the last octave is rolled off a large amount...maybe this horn is more suited to musical instrument use? Guessing here i admit.
If you mean the roll past 5kHz, that's the mass breakpoint of the compression driver; on a constant-directivity horn it will cause amplitude roll and need to be EQd. If the horn has collapsing directivity at high frequencies, that will sometimes perform an adequate compensation on-axis.
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ok. That makes sense, and im sure ive heard that before. If i dont care about efficiency then i could HP at 6db slope, at around 5k? Rather than EQ and DSP which i dont wish to add to my build costs.
You'll find these drivers produce a constant power, and the time period of a higher frequency means less power. A waveguide on these seems to roll off, but it is fine as long as you EQ. With the right horn you can get beyond 10k. This can be done passively.
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The Peavey 22A is a one inch screw on wide range driver. The stock dipahragm is a two inch deep drawn aluminum one piece diaphragm / former so the diaphragm is the heat sink for the VC and it has a Mylar suspension. Pretty high tech for a 30 + year old driver. New Ti diaphragms are abailable for under $40.00 with shipping in. The 22A goes for very little. You should look to see if you can match the exit angle of your driver with your horn. When this driver is maated to a suitable horn it sounds very good. Best regards Moray James.
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