S'pose there was a $125 200-Hz JBL Horn

[rlsound]

Am I reading that paper correct? You can load an 8" CMCD driver onto a 2393 horn?

[Zilch]

http://www.jblproservice.com/pdf/PRX...ies/PRX535.pdf

Any idea of cost on the mid horn? Looks like it's about 8"x14" ?

Call Pro Parts and ask; $15, as I recall. The Eminence mid driver is cheap, too.

The combo's only good for one octave or a little more, but that's all that's needed in many apps....

[badman]

Call Pro Parts and ask; $15, as I recall. The Eminence mid driver is cheap, too.

The combo's only good for one octave or a little more, but that's all that's needed in many apps....

W00

Okay. I have some 98dB mids that might just match up nice :}

[JoMoCo]

Edgar Tractrix. They sold for $261, more than a pair of these PTs. Compression, but no phase plug. Bolting a 2118 with a sealed back chamber on the PT appears analogous. That I can try. I haven't measured anything for a baseline yet....

Zilch, did these turn out to be promising or worth considering?....

[Zilch]

The Edgars I did not purchase; they were just an illustration of the principle here.

The others I have tried only on a preliminary basis....

[JoMoCo]

I have not yet found this part on the horn list... maybe there is a separate CMCD or other part list?. or Maybe they will be updating the Horn Parts List in the future.....

I also can't tell if this is a closed back can assembly from the pdf or if it is open to the back of the 6.5" driver....

http://www.jblproservice.com/pdf/PRX...ies/PRX535.pdf

Any idea of cost on the mid horn? Looks like it's about 8"x14" ?

[Zilch]

You call them up and order by part number.

The driver is a closed-back Eminence.

[cosmos]

2118 seems to be a "Go" with the phase plug, mechanically. Add the larger diameter (~3.5") 2250 dome, remove the tire and make a 1/4" plywood adapter ring to seal the rear to the stock back can with foam gasket tape.

[Gonna get yelled at, I jus' KNOW it.... ]

What these have is best characterized as "SMACK!"

Would something like a Radian 8" 508/2B Coaxial driver be appropriate in a 200Hz CMCD waveguide? I have never heard these, but I have read great things about them. They aren't exactly cheap, but they'd cover everything from 150 to 20K Hz.

[JoMoCo]

You call them up and order by part number.

The driver is a closed-back Eminence.

So after searching you are thinking that the Eminence "closed back" is sourced for this mid wave? No additional gaskets shown or needed...

I will give JBL a ring next week, but I do have a pair of 2118 collecting dust also and I do appreciate that IPA hoppiness .......

[JoMoCo]

Would something like a Radian 8" 508/2B Coaxial driver be appropriate in a 200Hz CMCD waveguide? I have never heard these, but I have read great things about them. They aren't exactly cheap, but they'd cover everything from 150 to 20K Hz.

You may want to ask that over at the modern coaxial drivers thread... http://www.audiokarma.org/forums/sho...d.php?t=276365

Speaking of a large (er) waveguide...(of particular note check out the phasing plug on the tech sheet)...here is a pic of the JBL 12" unit....

http://www.jblproservice.com/pdf/PD_...5212,95-Wh.pdf

[rlsound]

That 12" Waveguide is big bucks, something like $970. I looked into it last year.

[spkrman57]

Since Northridge shut down manufacturing I was wondering if the waveguide/horns can still be had!

Regards, Ron

[pos]

HELP! The link does not work and I'm interested, anybody have the new link or a backup of the technote?

here it is:

[cosmos]

Any update on this CMCD waveguide? Has anyone seriously tried and listened to them yet?

[JoMoCo]

I heard of someone over on one of the HT forums using the QSL combo high/mid unit, which is very reasonably priced comparitively to JBL ....

From the anuls of history...I noticed that the Jensen TR-10 Tri-ette used a closed back mid driver between a horn HF and a 12" Flexair surround alnico (on the earlier units) LF woofer....