8" driver in LARGE horn.....
JBL sells the CMCD_82 specialized 8" driver designed for horn loading. JBL designed a phase plug for the CMCD_82 which improves high frequency quality up to 2,000Hz by equalizing wavelength variant path lengths, similar to small diameter compression driver technology. About $600/driver with phase plug. JBL sells modest size Progressive Transistion Waveguides for the CMCD_82, including an 18" x 18" with a 90H x 50V polar pattern. There is also a LARGE 38" diameter 24" deep JMLC horn which the CMCD_82 is reported to perform well on. Several well reviewed JBL studio speakers use the CMCD_82 + PT waveguides, with a compression driver tweeter in similar directivity PT waveguide, and a couple 15" woofers.
JBL Progressive TransitionTM (PT) Waveguides.
PT-K95MH waveguide (90° x 50°, 18 x 18in, rotatable.
PT-K64MH Mid-High Frequency 60° x 40° rotatable
VP7315/64DP Powered 15" 3-Way Integrated Loudspeaker System
--CMCD_82 in PT-K95MH waveguide (90° x 50°, 18 x 18in, rotatable.
--JBL2452H-SL, 100mm (4 in) titanium damped diaphragm, 1.5 in. exit. Waveguide: JBL PT-K64-MHF
JBL sells the CMCD_82 specialized 8" driver designed for horn loading. JBL designed a phase plug for the CMCD_82 which improves high frequency quality up to 2,000Hz by equalizing wavelength variant path lengths, similar to small diameter compression driver technology. About $600/driver with phase plug. JBL sells modest size Progressive Transistion Waveguides for the CMCD_82, including an 18" x 18" with a 90H x 50V polar pattern. There is also a LARGE 38" diameter 24" deep JMLC horn which the CMCD_82 is reported to perform well on. Several well reviewed JBL studio speakers use the CMCD_82 + PT waveguides, with a compression driver tweeter in similar directivity PT waveguide, and a couple 15" woofers.
JBL Progressive TransitionTM (PT) Waveguides.
PT-K95MH waveguide (90° x 50°, 18 x 18in, rotatable.
PT-K64MH Mid-High Frequency 60° x 40° rotatable
VP7315/64DP Powered 15" 3-Way Integrated Loudspeaker System
--CMCD_82 in PT-K95MH waveguide (90° x 50°, 18 x 18in, rotatable.
--JBL2452H-SL, 100mm (4 in) titanium damped diaphragm, 1.5 in. exit. Waveguide: JBL PT-K64-MHF
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Thanks for the tip! Interesting line of products. I found a paper on the guides and one on the drivers that I need to read (over the week). Skimming through I see there is a 6" CMCD-61H that is better suited for the operating range I'm looking for (recommended for 400-3500Hz vs. the 8" 250-2000Hz).
In terms of horns, I guess a 90x50 will better match the TPL's 80x30 than the 60x40 option, right?
As I start to think this through I cannot but wonder why is it that others aren't doing this with TPL-150H. What's your view?
Cheers!
Bought one for a project. It should be on everyone's radar for high efficiency midrange use. The cleanest mids I've heard from a prosound driver. Reminds me of a nice home midbass but with a 20db output advantage.
Looking forward to it!
Do you intend to measure dispersion as well?
Which frequency range are you thinking of using it in?
If I have time I'll do dispersion measurements as well. Plan on using it from 250-2k. There is a small breakup peak at 4k. It was so clean I got carried away with the volume and fried a very nice dome....sounded glorious up to that point though.
Context Please.
Are your words referencing the 18Sound 10NDA610 ( or a JBL model mentioned by LineSource ) ?
Thanks 🙂
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Sorry about that. 10NDA610.
I will say the specs with AIC off of WooferTester 3 (Dayton) are a little different than the spec sheet. Without the AIC coil attached, the spec match pretty close. When attatched, Qes goes from .24 to .30, Qms goes from 6.9 to 1.5, Qts goes up to .25.
Le goes from 1.3 to .8mh. Impedance is under 10 ohms at 20k.
I will say the specs with AIC off of WooferTester 3 (Dayton) are a little different than the spec sheet. Without the AIC coil attached, the spec match pretty close. When attatched, Qes goes from .24 to .30, Qms goes from 6.9 to 1.5, Qts goes up to .25.
Le goes from 1.3 to .8mh. Impedance is under 10 ohms at 20k.
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Are these readily available or did you have to know someone who knows someone ...?
Seems very interesting.
Readily available around the web.
I'm surprised there's not more info on it. It's been around since at least 2004.
I'm surprised there's not more info on it. It's been around since at least 2004.
PHL or Audax 6" mids come to mind first
However those are not cheap, plus I don't like the idea of foam surround (rotten surrounds are the saddest sight IMO)
On the cheap and cheerful side are the Faital 6FE200 and Eminence Alpha6
No personal experince... but this is a pure midrange from about 500Hz up.
Voice coild travel is just over 1mm, efficiency hits 95-ish dB above 1Khz but will be under 90dB below that since the frequency response is taken on an infinite baffle.
Due to baffle step you will loose up to 6dB in the bass in a typical cabinet.
Voice coild travel is just over 1mm, efficiency hits 95-ish dB above 1Khz but will be under 90dB below that since the frequency response is taken on an infinite baffle.
Due to baffle step you will loose up to 6dB in the bass in a typical cabinet.
Audax Aerogel drivers, in particular PR-170zo !! (Sadly, no longer available)
http://site.diy-loudspeakers.com/images/datasheets/loudspeakers/audax/audax_woofers.pdf
audax speaker units from cadaudio.dk
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You guys know that Beyma is a professional manufacturer for decades and that treatments exist (and most probably
are used) to avoid deterioration of foam surrounds due to UV exposure?
Same story as above... pure midrange from 500Khz up.
10NDA610 110db distortion
Quick non-optimized distortion measurements.
- 110db @ 1 meter measured with pink noise using a CEM DT-85A
- 2009 ECM8000 uncalibrated measurement mic @ 2 meters into A&H ZED14
- 40 liter non braced 3/4" chinese birch box with minimal lining
- Bandpassed @ 150 and 4khz with LR12 slopes.
- Test signal using ARTA STEPS from 200 to 4khz
- 123.1 db max spl @ 1 meter with one channel of a QSC PLD4.5 just shy of clip indicator.
Quick non-optimized distortion measurements.
- 110db @ 1 meter measured with pink noise using a CEM DT-85A
- 2009 ECM8000 uncalibrated measurement mic @ 2 meters into A&H ZED14
- 40 liter non braced 3/4" chinese birch box with minimal lining
- Bandpassed @ 150 and 4khz with LR12 slopes.
- Test signal using ARTA STEPS from 200 to 4khz
- 123.1 db max spl @ 1 meter with one channel of a QSC PLD4.5 just shy of clip indicator.
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