JBL 2360 Compression Driver?

[JeffW]

I think the phenolic diaphragms take a specific, compatible motor.

[Lee in Montreal]

The benefit of using a 2360 horn is that it becomes possible to run a simple two way system. Using a phenolic diaphragm means you'll need to run a tweeter, and therefore run a 3-way system. There are more convenient horns then if you want to run as a 3-way.

I think that your next step is finding the best diaphragm you can afford. I run my 2360 w/ a 2445 and original Ti diaphragm. After all, they were designed to be used together... ;-) But, if I could find a "cheap" set of TADs... ;-)

Lee

[gibber]

Very true, Jeff & Lee and what a coincidence you mention this OKS,
as i have bought four "no knowledge if they work but they all look OK" diaphragms from the local Craigslist equivalent.
Turns out three of the four are open and it's my Sunday activity (first snow outside today) to get them perhaps fixed.




The 2482 fram is the best of the best in phenolic (find the advance JBL made on the 2480 fram in those data sheets). And they are the best independent of manufacturer (yes, i tried 290s), but as said by Lee -- why go for a good tweeter if you can do the job from your 2446 core with suitable fram ?

The dome and coil are same dia as in 244x/5x, but as Jeff indicated, the 248x motors have different centring pins & screw locations to hold the wider mounting ring that in turn resulted from the wider suspension used on the phenolic frams. By the way, Radian did a replacement in Alu for the Phenolic sizes (1282-16) for some time.
Ralph

[oks81]

Thanks guys!

Just had to ask about phenolic, I`m not going to buy!
For the time beiing I`m keeping it as an easy and simple two way system.
I`m not adicted to tweeter.
Maybe tweeter in the future.

So will go with the SL, and think it`s going to sound good!

Reading and understanding TAD is the ultimate driver for 2360, maybe some day if I get rich....

[oks81]

The forum should have "likes" button, same as facebook and norwegian hifisentralen!
Gibber get three Likes for pictures!

[Lee in Montreal]

Anyone has graphs comparing response of a 2451SL diaphragm compared to a 2445 Ti or 2241 Al diaphragm ?

[oks81]

Have this one found from page in Norway:



Normal Ti vs Aquaplas.

Maybe you can get the page tranlated through google?
http://www.hifisentralen.no/forumet/...2360-horn.html

I have read some about 2360 before I opened this thread, just wanted to know what u guys think!


On the measure, the drivers are laying on table without horn, mic 30cm away.
Notice Aquaplas has about 1dB less efficiency, increasing to 2dB up to about 10kHz. Notice also resonance at 350Hz is lower on the aquaplas.
The aquaplas should be less resonant, so shows the measure.
Think this is an 2445 driver.

Hope grelv is ok with me sharing this info!

Best oks

[oks81]

Think this is in 2446.




The measurements are done by Materion, not quite sure where the correct link is, sorry for that.
https://materion.com/

[dezmond]

The 2450sl diaphragms sound very good using the 2446h cores. I am using the jbl dsc260a to biamp the 4675 and they handle 392hz and up just as good as the non coated diaphragms.

[oks81]

Thanks for info dezmond!
It will get interesting to test!

got email from reconingspeakers that store was out, but more aquas are on order from JBL.
Just have to wait 1-2weeks more + shipping.
But thats fine! Nice tweaking diaphragms at christmas!

What xover do you have on your 4675?

oks

[dezmond]

Thanks and hello . I got my settings for the jbl dsc260 processor here - https://www.jblpro.com/pub/cinema/cinedsgn.pdf .
Scroll to the bottom of the page and it shows the settings. Its 392hz for the 2360 horn and 482hz for the dual 2226h's. The only thing I changed was the last eq at 12.9khz they want 13.5 of gain I use gain of 6.
I used a jbl m552 before I got the dsc260 and they both sound good but I like the dsc better. Plus it has more options for settings and eq and makes it easy to add a uhf horn or tweeter.

[oks81]

Ok! Did not know it existed such manual!


I use miniDSP 2x4 and measure with UMIK1 and REW.

Xover is 550Hz 48dB/oct on both.

Also highpass the 2226 bass drivers @20Hz, so don`t use power from amp on tones that don`t hear anyway.


Also have som EQ tuned in to get nice curve.
On 2360 I have these numbers:

1650Hz -8dB 1Q
2450Hz -1,5dB 2Q (High Shelf)

On bass I have five EQ points, but it`s dependent on room, so no good info putting in here.

I choose not to try to extend treble/high frequencies as the driver is mostly resonant and it will probably not make so good sound.

This is ongoing progress, and just as far as I have got at this moment



Have tried lower xover, down to 350Hz, but do not sound to good. Missing punch in mid section than!
Thinking 550Hz is abolutely minimum for my ears.

[oks81]

What JBL Alnico 2" compression driver do exist?
Just find 2440 and 2482.

[JeffW]

2441

http://www.jblpro.com/pub/obsolete/2441.pdf

[oks81]

Thnx Jeff!

Thinking these JBL Alnicos are hard to get and expensive...
Maybe look the TAD way is better..?

Remagnatize is maybe an issue on old Alnicos..?

Just talking, not buying!

oks