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Old 18th January 2011, 02:33 AM   #1
BHTX is offline BHTX  United States
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Default Sensitive dome tweeters

Out of boredom and curiosity, I compiled a list of sensitive dome tweeters, and thought I might as well share with the community. They're pretty much all rated at least 93dB @ 2.83V/1m or greater. Both 8 and 4 ohm impedances were considered. Along with diaphragm size and material, I also listed the specified Qts values when available. I think I had thoughts of a relatively efficient large 3-way with a dome, using no higher than LR2 acoustic slopes throughout. Anyway, I'm sure I've left out plenty of tweeters, so feel free to add to the list. It's just a simple txt file, so if the formatting doesn't look right, try changing your font to 10pt Verdana in notepad.exe, as that's what I was using.
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Old 18th January 2011, 06:33 AM   #2
el`Ol is offline el`Ol  Germany
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Sica, Supravox and Ciare are not included.
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Old 18th January 2011, 06:59 AM   #3
CLS is offline CLS  Taiwan
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Quote:
BRAND/MODEL SIZE/MATERIAL OHM Fs (Hz) Qts dB

Monacor DT-74/8 1/2" Soft 8 2000 - 98
Is this possible? Or a typo?
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Old 18th January 2011, 07:49 AM   #4
BHTX is offline BHTX  United States
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Quote:
Originally Posted by el`Ol View Post
Sica, Supravox and Ciare are not included.
Thanks! I'm familiar with them, just forgot. I'll look at their offerings.

Quote:
Originally Posted by CLS View Post
Is this possible? Or a typo?
It's what they claim: MONACOR INTERNATIONAL:Product detail page
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Old 18th January 2011, 08:20 AM   #5
CLS is offline CLS  Taiwan
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Er... I cheked that out, too. (just before this)

It must be someone's typo. Though anything is possible, I just don't believe this 1/2" tweeter can be that sensitive.
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Old 18th January 2011, 09:01 AM   #6
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Looking at the frequency responce graph it looks like it's only about 90db at about 2k
and the 98db rating only comes into play at about 4k and higher. Then look at the photo and you see the face plate realy is a short horn.
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Old 19th January 2011, 08:00 PM   #7
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally Posted by CLS View Post
Er... I cheked that out, too. (just before this)

It must be someone's typo. Though anything is possible, I just don't believe this 1/2" tweeter can be that sensitive.
To my opinion monacor ads often 3 dB.

High sensitive dome Audax.
Click the image to open in full size.
http://www.audax-speaker.de/index.php?module=shop_articles&index[shop_articles][action]=details&index[shop_articles][category]=3&index[shop_articles][data][shop_articles_id]=55
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Old 19th January 2011, 10:23 PM   #8
ScottG is offline ScottG  United States
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Quote:
Originally Posted by Helmuth View Post
To my opinion monacor ads often 3 dB.

High sensitive dome Audax.

Yes, Monacor is guilty of "gilding" their graphs. ..and not solely based on enhancing 1watt/1meter performance.

The more efficient newer "Audax" drivers have really bad non-linear distortion performance..

https://www.madisound.com/store/manuals/TW025A26.pdf
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Old 20th January 2011, 10:23 AM   #9
Helmuth is offline Helmuth  Netherlands
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Originally Posted by ScottG View Post
Yes, Monacor is guilty of "gilding" their graphs. ..and not solely based on enhancing 1watt/1meter performance.

The more efficient newer "Audax" drivers have really bad non-linear distortion performance..

https://www.madisound.com/store/manuals/TW025A26.pdf
That is strange they claim lowest distortion level with this tweeter in the describing?

Your plot shows 5% distortion not what we call low, at 1W it puts out 95dB. THD has to be compared to the same loudness level on 1mtr not at 1W.
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Old 20th January 2011, 06:56 PM   #10
ScottG is offline ScottG  United States
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Quote:
Originally Posted by Helmuth View Post
That is strange they claim lowest distortion level with this tweeter in the describing?

Your plot shows 5% distortion not what we call low, at 1W it puts out 95dB. THD has to be compared to the same loudness level on 1mtr not at 1W.


It's not "my" plot.. and it is odd. ..you would think that ACC (who makes Audax drivers now), would know what they are doing with their measurements. Perhaps something was omitted on the graphs display?



Here is a a "Harman" run test of their most efficient tweeter:

https://www.madisound.com/store/manuals/TW025A28.pdf


It's not good either, but at least it's a THD plot and not a discreet plot of each harmonic.
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