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Small format cone driver in horn thread
Small format cone driver in horn thread
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Old 19th April 2017, 01:22 PM   #21
frangus is offline frangus  Australia
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Originally Posted by Auredes View Post
I've experimented with loading several small drivers in various tractrix horns. Works very well. The problem is directivity of HF response and lack thereoff in bigger drivers. You either go for "magic" mids, or amazing highs or just build additional horns for seperate drivers. I've had best results with loading a 30 cm x 30 cm square tractrix loaded with 1" alu driver, with highpass at cca 800-1000Hz.
Yes, its a trade off

Testing some smaller 2" CD horns now with a higher crossover point...
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Old 19th April 2017, 09:29 PM   #22
burgunder is offline burgunder  Denmark
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Originally Posted by frangus View Post
My latest iteration of the batcave system is a cheap 2" driver loaded into a tractrix horn

I am getting useable response from 200hz to 16khz. Below is a 15" woofer in a U frame with response down to 35- 40hz in room. Subwoofer support is in progress

The clarity is exceptional especially in the lower midrange and upper bass. The sound is very accurate and clear on axis with the point source covering most of the audible range

Next ill try some 3.5"-4" drivers in a JBL conical midrange horn pictured below

Anyone else had success with this setup?
What's the sensitivity of this system?
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Old 19th April 2017, 10:16 PM   #23
frangus is offline frangus  Australia
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Its triamped at the moment with eq boost to the subs. I will have to test the difference with and without the horn on the fullrange driver to see how much increase in sensitivity I am getting.

A quick measurement shown below. 30cm from horn mouth
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Old 20th April 2017, 03:42 AM   #24
POOH is offline POOH  United States
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Lookin good
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I'm into real life dynamics and tone. Recipes for fully horn loaded horns systems are for me, direct radiator speakers bore me. Why have a fax when you can have vivid 3d technicolor? I love the sound of live instruments. This is my goal with my playback.
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Old 20th April 2017, 04:00 AM   #25
fluid is offline fluid  Australia
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Quote:
Originally Posted by frangus View Post
Yes, its a trade off

Testing some smaller 2" CD horns now with a higher crossover point...
Reminds me of this

2" madness :) hornloading the TB-W2-803SM
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Old 20th April 2017, 06:47 AM   #26
mrk7 is offline mrk7  Australia
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Originally Posted by frangus View Post
Hi, i have a small dayton phone mic. I wonder if this will record a sound clip when I use the phone video camera?
Maybe. If I recall correctly, xrk was able to record excellent audio clips with a 'usb' measurement mic (in his 10F/8424 & RS225-8 FAST Ref Monitor ) and JShadzi had great success with just a phone mic.
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Old 20th April 2017, 03:06 PM   #27
mexicano is offline mexicano  Canada
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Few general questions
Do we feel that these small format cone drivers are sonically comparable or better than an entry level compression driver?
Do we feel it would be benificial to load a 2" or 3 " cone driver into a smaller throat to provide a bit of compression (would it be detrimental to the frequency response or distortion ?)?
Do we feel that some of these small cone drivers are easier to integrate with other drivers than a compression driver?
pretty situational based, but any general opinion appreciated
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Old 21st April 2017, 12:32 AM   #28
hollowboy is offline hollowboy  Australia
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Originally Posted by mexicano View Post
Few general questions
Do we feel that these small format cone drivers are sonically comparable or better than an entry level compression driver?
In general, a CD will have high efficiency over a wider bandwidth than a cone driver - so you need to measure and eq them to do a proper comparison. With that done, they sound fairly alike to me.

The cone driver might be happier with a low crossover. Not sure how distortion levels compare. Note that the CD might not like some 'entry level' electronics, since any hiss and noise will be >10dB louder.

See post four.
Tweeter for coaxial mounting in midrange horn

This was an 8-ohm cone vs a 16-ohm CD.
Same volume & eq settings.
They are comparable <1kHz.
The CD is about 15dB louder from 2-6kHz.

NOTE: this was a $50 cone driver vs a CD that cost $200 second hand, so the cone is doing well to be at all comperable.

Quote:
Originally Posted by mexicano View Post
Do we feel it would be benificial to load a 2" or 3 " cone driver into a smaller throat to provide a bit of compression (would it be detrimental to the frequency response or distortion ?)?
Yes, or more: the post I linked was a 4" driver on a 2" throat.

Ideally, you'd get fancy with phase plugs to extend the response. I found that just by introducing some asymmetry (a few bits of sticky foam), I could reduce the 4kHz notch (to about -3dB), so I could get decent response to 6kHz with either driver.

Quote:
Originally Posted by mexicano View Post
Do we feel that some of these small cone drivers are easier to integrate with other drivers than a compression driver?
pretty situational based, but any general opinion appreciated
Depends on the equipment (passive? DSP?) and the range you want to cover.

With the components I linked, 500Hz-2kHz would be about equally easy.

If using passive components, and trying for a 6kHz crossover, I'd say a CD would be much easier: the crossover for the cone driver would need a lot of parts, which would cost more than the driver. I personally find that anything more complicated than a 2nd order passive crossover is too much work.
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Last edited by hollowboy; 21st April 2017 at 12:46 AM. Reason: Added note
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Old 21st April 2017, 04:47 AM   #29
fluid is offline fluid  Australia
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Quote:
Originally Posted by mexicano View Post
Few general questions
Do we feel that these small format cone drivers are sonically comparable or better than an entry level compression driver?
Do we feel it would be benificial to load a 2" or 3 " cone driver into a smaller throat to provide a bit of compression (would it be detrimental to the frequency response or distortion ?)?
Do we feel that some of these small cone drivers are easier to integrate with other drivers than a compression driver?
pretty situational based, but any general opinion appreciated
When a driver is mounted in a compression chamber it often causes frequency response dips at high frequencies due to unequal path lengths. If the transition is smoothed or damped it can help and bushmeister did a really excellent job in the transition from the SB driver to the XT1464 horn as the driver is bigger than the horn entry. Not so much an issue for a midrange horn as the crossover will take it out.

The transition from driver to horn whether it is a compression driver or cone will determine the impact on frequency response. Not all drivers are suited to every horn a reason why manufacturers often work hard to get a good combination.
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Old 21st April 2017, 09:22 AM   #30
frangus is offline frangus  Australia
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Originally Posted by fluid View Post
And a similar horn too

Thats a low crossover point for the horn size...
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