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View Full Version : Need spec sheets for 077 and 075's



Nightbrace
01-19-2007, 01:38 AM
Thanks guys...

4313B
01-19-2007, 02:14 AM
Ultra-High Frequency Transducers (http://www.jblpro.com/pages/components/uhf_drvs.htm)


We should have come up with a forum bot to post these replies over and over.

Nightbrace
01-19-2007, 03:39 AM
If I wish to try the 075/2402's do I need to make some crossover mods?? Same question concerning the 077/2405's...

Currently running 2203, 2420/2312/2308, 2404 with upgraded 3331 networks

http://www.jblproservice.com/pdf/Network%20Schematics/3131%20Network.pdf

Sorry for not including this info initially.

Trying to decide if I should upgrade my EN3 cabs from what I currently have or go another direction like building a set of 4343's.. These were to be my MAIN monitors, but I have not been able to get them quite as dialed in as I'd like them to be. Wish I would have stayed here and listened to you guys, as I sorta sailed into uncharted waters with them, but have made a lot of progress and I have them sounding about as good as they ever have.

Been forced to use my L200B's after the sale of my L300's, and I'd like to sell the L200B's to help fund my upcoming 4343 or 4345 project, and once they sell would like to put these into full time use while working on them. Or should I just make things easy and add 077/2405's to my L200B's with N333 networks? I just would hate to alter such nice original speakers.

How comparable is the 2420/2312/2308 combo to the LE85/H92/L92 combo?

Does anyone happen to have the specs (impedence curve/frequency response) of these combos?

Also needed are specs of LE5-6/8/10/12 Mids. I'm curious to know how they compare to the "best", as I've always regarded them very highly from about 2 kHz to 6 kHz, just wondering if these can be used in a "budget" custom 4-way set-up with drivers like 128H/2121/LE5-6../044? For those who don't NEED compression drivers and cannot afford the expensive 136/2331 woofers or simply don't want to use cabinets that are large enough to accomodate them this might be a decent alternative.


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Nightbrace
01-19-2007, 03:42 AM
Thanks Giskard for the spec sheets....

johnaec
01-19-2007, 05:06 AM
Also, do a search here for the "ring radiator comparisons" thread. Widget did a bunch of CLIO curves on these, at least for the 2403, 2404, and 2405. I don't think any were done on the 2402, though...

John

Zilch
01-19-2007, 11:31 AM
What crossovers are you running, 'cause you linked to N3131, a two-way?

Also, please post a pic of your present system in the EN3 enclosure....

Nightbrace
01-19-2007, 03:13 PM
I'll be sure to post a pic, I merely added to the 3331 Networks to account for the tweeters. I cannot remember exactly what value cap I used, but I have the 2404's starting off at ~ 8 kHz and for now they seem to blend decent with the other drivers dB wise, but there is a noticable transitioning on certain passages (very minor, but if its audible there has to be at least a 3 dB increase)

I used L-pads to try and correct this, but even when I get the volumes matching I still can't get them quite right. David at commonsenseaudio.com helped me out with the crossovers, and recommended to start them at ~ 8 kHz and to use the L-pads, so I cannot take any real credit or blame for them. I am not a crossover expert by any means. He did mention though that this was merely a base for me to start at and did tell me that I would have to tune them to compensate for the room's acoustics. All I have done really is dial them down a bit with the L-pads and they do sound really good and go very high and are very crisp without being as overbearing as the L300's I had were.

He admitted to me that he is by no means a crossover design expert either and deals mainly with full range drivers, and the more I think about it the more I know that there is going to be work needed to be done to the crossovers and/or different tweeters to get them to sound REALLY good. Like I said, I still consider my L200B's to sound a bit better than them for the most part (especially in the upper bass), although the EN3's go much higher, and even go a bit lower, (tuned flat to approx. 23 Hz with the 2203 which is consistent with the graphs you constructed for me a LONG time ago...) I did initially try the 128H's you recommended, but they were a little too boomy for me with these crossovers. The 2203's are very smooth and more realistic. I was lucky enough to come across a set of 2203's and had them reconed using C8R121A kits by JBL so I think now they are technically 121H's as the correct reconing kits were no longer available. They sound amazing, couldn't be happier. Will they read the same as the 2203H's? Any chances of you having the time to run them through your software and getting some curves for me?? Just the VHF-UHF transition is not as flat as I'd like it to be. There is an audible volume change when transitioning from one driver to the next and its significant enough to want to consider my options to improve them.. Don't really have the money to buy L300's/4333's either and I know I can get these sounding nearly as good and with a slightly smaller footprint..

I should have just made things easy on me and built N333 networks, but I bought a pair of badly banged up 4331's sold the woofers (which needed reconing at the very least) and used the rest. Got too good of a deal to turn them down and like the way the speakers sounded without the 2404's for the most part (very similiar to the L200B's) I really wanted the 075 tweeters, but got such a good deal on the 2404's that I wanted to use them...

Nightbrace
01-19-2007, 08:17 PM
Hmm what about the 076/2403's?

Nightbrace
01-19-2007, 08:32 PM
There's an Ebay auction with 2405H diaphrams in 2402H's,

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290074258966&fromMakeTrack=true

has anyone tried this combo?

johnaec
01-20-2007, 05:50 AM
There's an Ebay auction with 2405H diaphrams in 2402H's,

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290074258966&fromMakeTrack=true

has anyone tried this combo?The biggest problem with 2402's is that they're so "beamy" at higher frequencies.

John

4313B
01-20-2007, 05:58 AM
The biggest problem with 2402's is that they're so "beamy" at higher frequencies.

JohnThe small aperature 045's are the ticket.

johnaec
01-20-2007, 06:01 AM
The small aperature 045's are the ticket.Aren't those the ones that run above 20khz? I'd never hear those in a million years... :p

Actually, I'll have to take a look at the specs, (somewhere...) - 'just curious...

John

Nightbrace
01-20-2007, 07:26 PM
Sorry for not being clear, what I was asking is if anyone has ever used 2405H diaphrams in 2402H's Will this make any difference in the sound?

Nightbrace
01-20-2007, 07:27 PM
Aren't those the ones that run above 20khz? I'd never hear those in a million years... :p

Actually, I'll have to take a look at the specs, (somewhere...) - 'just curious...

John


To me the 2405's are a little to beamy and looking for something a little more subtle..

What you guys think of the 076/2403's?

Nightbrace
01-20-2007, 07:37 PM
Giskard, off topic I know, but I posted this in another thread, and I figured who better to ask... Sonically whats the difference between the 2203H's and 121H's? I've had 2203H's refurb'd with the kit for the 121H as the original kits are no longer available.. and now they are the sonic equivalent of the 121H and would like to know what the difference is, if any. Trying to get my EN3's sounding as close as possible to what the were supposed to have when original..

Robh3606
01-20-2007, 08:58 PM
The only driver JBL used consistently in the monitors was the 2405. Not too hard to see which one JBL's favorite was. The only monitors that used the 2403 are the Westerlakes.

Rob:)

Nightbrace
01-20-2007, 09:31 PM
Yeah, but what about the 2402's with 2405 diaphrams??

Robh3606
01-20-2007, 10:47 PM
The diaphram will not make any difference in the area of coverage. That is set by the actual horn dimensions. The directivity will not change and the 2405 is clearly superior in this aspect. If you find the 2405 coverage to restrictive the 2402 is not the way to go.

Rob:)

Nightbrace
01-21-2007, 03:57 AM
hmm, what about the 076?

Robh3606
01-21-2007, 06:02 AM
There are no published curves that I know of. Widget and Zilch did some comparisons with CLIO and you can get an idea by looking at the off axis coverage from measurements they did. Based on the measurements provided the 2405 is superior to both the 2402 and 2403 . The 2403 seems to fall between the two.

http://audioheritage.csdco.com/vbulletin/showthread.php?t=6368&highlight=hORN+COMPARISONS


Rob:)

Nightbrace
01-21-2007, 06:04 AM
Thanks, it looks like the 2405's are the way to go... This thread has officially ended, I got 'em...