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4313B
01-31-2008, 02:22 PM
.

richluvsound
01-31-2008, 02:51 PM
4313b,
Thats a lot of formula and diapers .:applaud:

`Nice to see you in the neighbourhood> I hope all is well with you and yours.
Rich

jbljfan
01-31-2008, 04:39 PM
Ditto what Rich said. Interesting change on the project.

Guido
02-01-2008, 12:24 AM
does this look like a 2way crossover ?

Zilch
02-01-2008, 12:18 PM
does this look like a 2way crossover ?435Be there would indicate Project May continues as a UHF-augmented two-way.... ;)

timc
02-04-2008, 01:06 PM
That 476Be looks like one beefy Compression Driver :D


-Tim

Ian Mackenzie
02-04-2008, 06:39 PM
Nice jewellery on the dining room table.

I wonder what horn is being used?

rs237
02-05-2008, 12:11 AM
I wonder what horn is being used?


yes, a good question.

regards
juergen

4313B
02-06-2008, 04:14 PM
I wonder what horn is being used?Most likely wood H9800 clones without the 045Be mounts carved into the upper lips.

A dual 15-inch 2-way is definitely a long way from what was originally envisioned by Mike Baker way back in the day but the performance from this type of system is staggering to say the least.

And it only took JBL sixty years of constant R & D to get here! :)

mikebake
02-06-2008, 05:29 PM
A dual 15-inch 2-way is definitely a long way from what was originally envisioned by Mike Baker way back in the day but the performance from this type of system is staggering to say the least.

:)
Yes, but can it REALLY best a 2226/2425 on a 2373 in a 4655BK?? :D
Seriously, those drivers once again just LOOK great, as well. Lust-iness.

caladois
02-17-2008, 02:56 AM
I thought it impossible to get these parts ?

Guido
02-18-2008, 12:53 AM
I thought it impossible to get these parts ?


There is an official offer from GT somewhere inside the Everest 2 thread.


We will be glad to sell you one for a cool $3500.

I didn't try to order them as I simply do not have the money (at the moment). I'm also not sure if I would get them as I said I don't like the electrolythic caps of the Everest 2 crossover what caused a bit anger at the other side.:D

Valentin
02-18-2008, 04:19 PM
did you get 3 or 4 of them

hope to see soon pictures of the finished speaker
with does drivers you are measuring your abilities not the drivers

good luck

timc
02-19-2008, 07:47 AM
Is it $3500 for a pair or each?

They would look great on my H9800 wannabes



-Tim

Edit: at $7000/pair there is no way i can afford them :(

richluvsound
02-19-2008, 09:13 AM
EACH:)

timc
04-24-2008, 09:11 AM
Any progress yet?



-Tim

John
04-24-2008, 11:53 AM
EACH:)


I heard the other day it was for the pair:coolness:

richluvsound
04-24-2008, 12:12 PM
Thanks John,

In that case, I've just forgotten TAD 4003 :D

Rich

4313B
07-27-2008, 09:34 AM
I think we should put an order in for 26 of them, and 26 1500AL's too.

Ian Mackenzie
07-27-2008, 06:36 PM
Stop it..its getting painful.

I mean like +- 1 db...I don't think I could afford a mic that flat!

Ian:)

timc
08-09-2008, 11:10 AM
That is really nice looking.

Is that anechoic response, or your in-room respons?



-Tim

Guido
08-12-2008, 04:49 AM
Is there an EDS available for the 476Be?

4313B
08-15-2008, 07:06 AM
That is really nice looking.

Is that anechoic response, or your in-room respons?I did a bunch of measurements of the 435Be and 476Be on the PT-F95HF, H4338 and H9800 horns over the course of a weekend to get the data for LEAP. I used JBL's method of shooting straight up into the sky with the mic suspended 1m overhead.
Is there an EDS available for the 476Be?Not when I last checked a few years ago.

4313B
08-15-2008, 07:10 AM
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4313B
08-15-2008, 07:21 AM
The last two graphs have the 2441 and 2311/2308 added just for fun.

pos
08-15-2008, 07:38 AM
:jawdrop:the 476Be looks really smooth on the wave guide! And this really is without any EQ?
Impressive!

4313B
08-15-2008, 07:41 AM
the 476Be looks really smooth on the wave guide! And this really is without any EQ?
Impressive! Yes, that is without any EQ applied. Greg predicted that it would be very smooth even though he had never tried it himself. I finally got around to testing out his theory.

Here's an EQ circuit example:

pos
08-15-2008, 08:29 AM
Did you give it a listen in your dual 1200FE speaker?

Could that smooth curve indicate that the 476Be sound better on that wave guide than it does on the H9800/H4338 (with proper EQ for both, and only above 1200Hz or so, for comparison) ?

pos
08-16-2008, 05:17 AM
4313B, do you have distortion measurements for all these combinations?

4313B
08-16-2008, 07:39 AM
Did you give it a listen in your dual 1200FE speaker?

Could that smooth curve indicate that the 476Be sound better on that wave guide than it does on the H9800/H4338 (with proper EQ for both, and only above 1200Hz or so, for comparison) ?Maybe in a couple months I'll have time to do that.

The smooth curve looks quite interesting. It's a very nice driver.
4313B, do you have distortion measurements for all these combinations?No, I didn't have time for that. I just needed some data for LEAP. I have more measurements to take in the future depending on how the projects go.

Robh3606
08-16-2008, 08:20 AM
Thanks for posting the plots and comparisons.

Rob:)

pos
09-05-2008, 02:36 PM
Here is a comparison with the 2452H-SL on the same waveguide, that Zilch posted here: http://audioheritage.org/vbulletin/showthread.php?t=3450&page=6#84
(consider the green curve)

It seems to show a similar behavior as the 435Be, and nothing as smooth as the 476Be

Seriously, I keep coming back to this thread just to drool over that 476Be/WG graph! :hyp: :hyp: :hyp: :hyp: :hyp: :hyp:

4313B
09-05-2008, 02:46 PM
Seriously, I keep coming back to this thread just to drool over that 476Be/WG graph! :hyp: :hyp: :hyp: :hyp: :hyp: :hyp:Yeah, they're currently backordered to mid-2010 :banghead:

The TAD looks like the better DIY driver since you might actually be able to get one. :p

The best anyone can get from JBL right now is the 2452H-SL via JBL Pro.

Mr. Widget
09-05-2008, 03:06 PM
Yeah, they're currently backordered to mid-2010 :banghead:The TADs are only a little better bet. They always seem to be seriously backordered too.

No one seems all that interested in the DIY market. :banghead:


Widget

4313B
09-05-2008, 03:09 PM
No one seems all that interested in the DIY market. :banghead:Parts Express seems to be...

I wonder who buys what from them, what the numbers are for the various transducers they sell.

Mr. Widget
09-05-2008, 03:38 PM
Parts Express seems to be...Sure, and then there is Madisound and Speaker City and E-Speakers, but they are all retailers. I was thinking about the manufacturers. Dynaudio and JBL used to support component sales, TAD still does but on a very limited basis. There are still a handful of European manufacturers who sell individual components, but they are becoming more and more scarce.


Widget

Ian Mackenzie
10-31-2008, 07:54 PM
http://www.supravox.fr/kits.htm
http://www.troelsgravesen.dk/AT-R.htm
http://jantzen-audio.com/html/drivers-jantzen-audio.html

In Europe there are a number of manufacturers that support diy.

In this respect there is some end engineering of drivers for specific diy designs as in this driver here made by Seas in Norway:

http://jantzen-audio.com/download/PD_JA8008_Oct07_v1-f.pdf

http://www.troelsgravesen.dk/JA8008.htm

I think when you talk about manufacturers not supporting diy it needs to be qualified fairly carefully.

If you talking about selling direct, I dont regard wholesale of drivers as supporting diy. As usually those drivers are for Pro End market applications like Eminance and those guys. The average duy person has not got a hope in hell of using one of those wthout support.

This is where serious diy engineers like that above, ZAPH and a few others have leverage and a manufacturer will work with the designer to come up with a working design, the same applies to Peerless who support diy end to end designs.

I think GPA also supports diy which leads me to another idea below.

But if you apply the above to JBL they obviously don't and it's just not viable for them to do so they way they are structured.

I do think however if it was looked at like Harman-Japan as a seperate entity it might work but the retailers in Japan might get pissed off with the same new drivers used on current models were being sold on the streets supported with diy designs.

If they decided to re issue the component series like the LE10A, the 136A and the 375 with some plans under license it would be very interesting .

The way to look at it is the money made on recyling of a LE10A say 10-15 times over its life time with after market players like Ebay and re srrround guys like Orange County who profit from re cyling these types of items..that is the business case the bean counters at JBL need educating on. The profits made after the driver was re sold are probably in the order of 500% on the manufactured profit margin.

By re issueing a classic line like the LE series they would be effectively doing a Reset on the Product Life Cycle.

The baby boomer rules the sales $ in audio and they are the target market.

duaneage
10-31-2008, 10:53 PM
I find myself going back in time for DIY projects because those are the drivers that are available. If one is willing to swallow pride and try Asian made drivers (read: Chinese) and give it a go there are options available. Purists will shriek at the mention of using these components but where else are raw components going to come from and just how much are you willing to pay for a tweeter or a woofer.

20 years ago I use to tell people I could make a better system than I could buy for the same money. Wood was reasonable, drivers were available from a variety of companies, you could truly make great stuff. Now that has changed as costs and marketing have driven the market in two directions: extreme high end and very low end. When people are content with 299,00 HT sound with 5 satellites and a cheap sub therein lies the problem.

Parts Express has a decent offering of drivers to play with, maybe not up to everyone's standards but someday we won't be able to use what we are used to at any price.

4313B
04-28-2009, 03:11 PM
Update on the 476Be driver as of April 2009:

This material is marked obsolete, and is not for sale.

Valentin
04-28-2009, 04:32 PM
is the new magnesium alloy driver the replacement


so we are looking to a new dd66000 Mag

or is there a new beryllium alloy coming out

JBL 4645
05-04-2009, 10:34 PM
Is it $3500 for a pair or each?

They would look great on my H9800 wannabes



-Tim

Edit: at $7000/pair there is no way i can afford them :(

:(I second that looks like we’ll have to knock off few 7/11 to get the money.:D

That’s light-years out of my price range. JBL 476Be looks sexy looking in design.:bouncy: Fascinating read on the pdf file on the Everest.

http://manuals.harman.com/JBL/HOM/Product%20Information/Brochure_Everest_Eng.pdf (http://manuals.harman.com/JBL/HOM/Product%20Information/Brochure_Everest_Eng.pdf)

4313B
05-05-2009, 07:46 AM
is the new magnesium alloy driver the replacement


so we are looking to a new dd66000 Mag

or is there a new beryllium alloy coming outAs far as I know JBL has no interest in selling the 476Be or 476Mg outside of a complete system. :(

End users can use the $1,429 2452H-SL from JBL Pro which is available for a mere pittance off eBay.

pos
05-05-2009, 08:46 AM
Maybe we will see Mg diaphragms on some por drivers also?
And maybe even a pro version of the 476Mg?

pos
08-17-2011, 05:41 PM
What is the polarity on the 476Be/Mg ?

Guido
08-22-2011, 08:51 AM
What is the polarity on the 476Be/Mg ?

If you look at the Everest tech sheet the 476Be is negative. But to be safe I need to test it at the actual unit. I'll unpack the whole stuff when my cabinets are here in september.

pos
08-22-2011, 02:02 PM
Thanks
That would make sense as it has always be the polarity JBL used in their compression drivers (even the 2435).
How do you wire your truextents?