No , I didn't mean it that way. I was wondering if ruler flat impedance can be an indicator of flat frequency response or is it always to be seen as an independent variable.
When I wrote to ESS asking for data I didn't specify what data, though I was imagining a freq. resp. graph (maybe accompanied with impedance) and if lucky maybe also polars. I was a bit surprised that the pdf had impedance and phase only. I don''t know much so wondered if that was enough for knowledgeable people to understand something of FR.
When I wrote to ESS asking for data I didn't specify what data, though I was imagining a freq. resp. graph (maybe accompanied with impedance) and if lucky maybe also polars. I was a bit surprised that the pdf had impedance and phase only. I don''t know much so wondered if that was enough for knowledgeable people to understand something of FR.
It's best to see it as independent. Not everything that happens in response is reflected in impedance.
Somewhere during all the research on these (iirc the first heil amt’s) I remember seeing that the warranty would be void if ever any test tones were run through these tweeters……would that be a actual design problem or a ruse to keep people from measuring a ugly looking fr? 😀
Hilarious.
I'm certain that many users have broken many supertweeters running sweeps carelessly.
I'm certain that many users have broken many supertweeters running sweeps carelessly.
It was referencing the heil amt, they were not marketed as super tweeters (that’s my stupid idea!)….I’ll see if I can’t find it again and link it.
Edit…can’t seem to find it in the browser history and upon recollection it was ‘any sine wave run through it will void warranty’ …..same thing, no?
Edit…can’t seem to find it in the browser history and upon recollection it was ‘any sine wave run through it will void warranty’ …..same thing, no?
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It was a basic "you burn it, you bought it" notice.
Considering that by the age of 64 the average person has lost near 40dB at 4kHz, 50 dB at 8kHz, and hearing is more or less “gone” above 10kHz, unfortunately it is easy to see the wisps of smoke from a VHF tweeter if you turn up the sine wave sweep enough to hear it.
There are certainly exceptions to the average, (hope you are one) but you may not find much difference adding "super tweeters" without some serious boost.
https://www.diyaudio.com/forums/everything-else/370200-hearing-frequencies-64-a.html#post6594412
Art
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Thx Art, I knew I read something about in all the mess! I’m still good to 15k @ 56 years.
If I can’t hear them as super tweeters I can just build another two-way with them…..they go down to 1k so I oughta be good for a couple years! 😉
Just got the notification they shipped! 😎
If I can’t hear them as super tweeters I can just build another two-way with them…..they go down to 1k so I oughta be good for a couple years! 😉
Just got the notification they shipped! 😎
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? TAKET Super Tweeter Batpure ? (First time I've seen these.)
about 1/2 way down
https://www.lencoheaven.net/forum/index.php?topic=33004.0
about 1/2 way down
https://www.lencoheaven.net/forum/index.php?topic=33004.0
I remember toasting a diaphragm back when you couldn't get any replacements. Sat on a shelf till the diaphragms became available. About 20 years or so 🙁 It's safe not to test below 500hz though. Last pair of diaphragms I got are good down to 900hz 4th order. (This is mounted in the "old" original housings. The ones with an angled throat.) Distortion is 45-50db below that ... a good pair.
Thx puppet, i won’t get crazy with the testing down low as that’s not the target.
And in use if wired in parallel from main tweeters with a small value cap (say under 2uf) there really shouldn’t be any issues at any volume that the main speakers can handle?
Only issue I see is if I use a seperate amp for the super tweeters I’ll have to pay attention to level matching as (like Art said) I more than likely won’t be able to actually hear if they’re too hot until the magic smoke appears!
And in use if wired in parallel from main tweeters with a small value cap (say under 2uf) there really shouldn’t be any issues at any volume that the main speakers can handle?
Only issue I see is if I use a seperate amp for the super tweeters I’ll have to pay attention to level matching as (like Art said) I more than likely won’t be able to actually hear if they’re too hot until the magic smoke appears!
Mine are paired with a pro 15" driver .. active, so separate amp. The diaphragms are really robust. I've had them as loud as 110db - 3meters away. In the range you're going to use them, they won't die.
Was going to try taking a page from Polk SDA tech and try running the left super tweeter from the right channel and the right super tweeter from the left channel to see if that might help with any possible comb filtering. Just a planned experiment, not preaching it at all 😀
Just covering all the bases…..plan for the worst, hope for the best! 😀
Some of the greatest results I’ve come across in audio stemmed from blindly fumbling around……..sooner or later I’ll know what I’m doing. 😉
To answer your question, I meant comb filtering as in two speakers/tweeters playing the same source in this case being almost 14” apart might be a issue?
Some of the greatest results I’ve come across in audio stemmed from blindly fumbling around……..sooner or later I’ll know what I’m doing. 😉
To answer your question, I meant comb filtering as in two speakers/tweeters playing the same source in this case being almost 14” apart might be a issue?
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No comb filtering at the listening position if they are the same distance from you, but there can be lobing.
The comb filtering at other angles doesn't matter much because into the far field you just look at power. It all boils down to a directivity change, ie less highs in the room.
The comb filtering at other angles doesn't matter much because into the far field you just look at power. It all boils down to a directivity change, ie less highs in the room.
So will adding a semi-omnidirectional source such as the ess heil amt help or hinder (in theory) and if hinder would swapping the extra tweeter left signal for right as in SDA tech make any difference?
I remember test driving one of the high end SDA speakers in the showroom when they first came out and was impressed by their spaciousness.
I remember test driving one of the high end SDA speakers in the showroom when they first came out and was impressed by their spaciousness.