4344

[frablake]

Hi all

I m very glad to be here. I m 55 years old, sound designer in France, and i want to make by myself a 4344 cabinet.
Is there anyone who can explain to me how the 4344 cabinet is made inside!
Is it in one part, or in two parts? what the size of each part??
Do anyone have plans of 4344?
Who has tried to built one, and what difficulties they are met?

Kind regrads from france to anybody.

francis

[yggdrasil]

Here's the 4345 plans: http://audioheritage.org/vbulletin/showthread.php?t=11856

You can either change to 4345 or adjust the box accordingly.

[stephane RAME]

http://audioheritage.org/vbulletin/showthread.php?t=1812&highlight=plan+4344

Stéphane

[frablake]

Bonjour Stephane

Merci pour votre réponse, mais je ne trouve pas les plans.Pardonnez moi, mais je suis nouveau sur ce forum et je n'ai pas encore saisi toutes les ubtilités de son utilisation.
Pouvez vous m'aider!

Cordialement
francis

[frablake]

Hi sir
very thanks for the plans.
Sorry, but i m very young on this forum, and i have to learn the rules.


Kind regards

Francis

[stephane RAME]

http://audioheritage.org/vbulletin/showthread.php?t=1812&page=4
http://audioheritage.org/vbulletin/showthread.php?t=1812&highlight=plan+4344&page=5
http://audioheritage.org/vbulletin/showthread.php?t=1812&page=10

http://jbl43.net/JBL4344e.html

Stéphane

[frablake]

merci stephane pour votre réponse.

J ai bien évidemment d'autres questions, notemment concernant les hauts parleurs.
A l'origine étaient utilisés:
2235H,2122H,2425J + 2307, et 2405H
Sachant que certains d'entre eux ne sont plus disponibles, que me préconisez-vous?

Cordialement

[frablake]

Hi all
thanks for the plans.
How can i replace the original transducteurs , or where can i find the original parts?

It s the same about crossover network?

Kind regards

Francis

[pos]

Il faut autant que possible essayer de trouver les mêmes HP, sinon il faudra revoir le filtrage.
Le plus dur à trouver sera le 2122H, mais il peut etre refait à partir d'un saladier de 2123H, LE10H ou E110 par exemple, avec un kit C8R2122.

Bonne chance!

[frablake]

Il faut autant que possible essayer de trouver les mêmes HP, sinon il faudra revoir le filtrage.
Le plus dur à trouver sera le 2122H, mais il peut etre refait à partir d'un saladier de 2123H, LE10H ou E110 par exemple, avec un kit C8R2122.

Bonne chance!

Merci.
Mais où puis je trouver ce kit ? chez JBL directement

Sinon en rcalculant le filtre, le 2123H peut il convenir?
Plus généralement que me conseillez vous??
francis

[Earl K]

Hello Francis,

I recommend that you try to get in touch with LHF member ayaboh (http://www.audioheritage.org/vbulletin/member.php?u=5460) by sending him a pm ( private message ) through this forum .

Additionally, read all of his posts for a sort of backgrounding about him and his capabilities .

A few years back, he created a ( 38 mb ) pdf file for the construction of the 4344 cabinet / ( with a slightly altered layout of the woofer ) . His CAD work was exemplary .

He once had a website that allowed the download of this huge file / but it seems to be no longer active .

Try to contact him to see if he will send you the full file . ( The file may need to be broken up into smaller parts for efficient transmission ) .

>< cheers :)

[ratitifb]

Le plus dur à trouver sera le 2122H, mais il peut etre refait à partir d'un saladier de 2123H, LE10H ou E110 par exemple, avec un kit C8R2122.

Bonne chance!C8R2122 is NLA :( good luck

[frablake]

Hello Francis,

I recommend that you try to get in touch with LHF member ayaboh (http://www.audioheritage.org/vbulletin/member.php?u=5460) by sending him a pm ( private message ) through this forum .

Additionally, read all of his posts for a sort of backgrounding about him and his capabilities .

A few years back, he created a ( 38 mb ) pdf file for the construction of the 4344 cabinet / ( with a slightly altered layout of the woofer ) . His CAD work was exemplary .

He once had a website that allowed the download of this huge file / but it seems to be no longer active .

Try to contact him to see if he will send you the file(s) . ( The file might need to be broken up into smaller parts for efficient transmission ) .

>< cheers :)
Thanks , i write to him, now

[frablake]

C8R2122 is NLA :( good luck
Sorry , but what is LNA

[Earl K]

C8R2122 is NLA :( good luck

Sorry , but what is LNA

" NLA " means ; " no longer available " .

- That may be true in France ( I wouldn't know ) / you should check this out for yourself ( also, PM LHF member "Guido" ( from Germany ) (http://www.audioheritage.org/vbulletin/member.php?u=117)) to see if he can help you out with components .

- The C8R2122 recone kit might be available in the USA / but you'll need to check with a US supplier .

>< cheers :)

[Chas]

[quote=Earl K;267669.

- The C8R2122 recone kit might be available in the USA / but you'll need to check with a US supplier .

>< cheers :)[/quote]

And if it still is, be prepared to wait for months....

[Uncle Paul]

Another option is to use a 2123 and the crossover/network for the 4344 MkII. The crossover is posted in the DIY section by member 4313b. You will have to do a search to find it.

[Uncle Paul]

http://audioheritage.org/vbulletin/showthread.php?t=24283

[frablake]

Another option is to use a 2123 and the crossover/network for the 4344 MkII. The crossover is posted in the DIY section by member 4313b. You will have to do a search to find it.

Yes i think i'll do like that, because i can buy it now.
Thanks

[Robh3606]

Hello frablake

If I were building up a pair if 4344 I would not go with the stock driver layout. I would go with an inline driver alignment for the 2235, 2122 and the 2425 and keep the 2405 on the side of the lense. I would also offset the woofer in the cabinet and not have it centered like the original cabinet. I would also build the grilles to be set up for a flush baffle and not build the overhangs to help minimize diffraction. I would also relocate the reflex vents away from the midrange driver for the same reason.

Depending upon what midrange drivers I could get I would consider the 4344Mk 2 crossover if the 2123 was my only option. As far as a crossover the alternates posted in Ian’s Linked posts worked out very well. The stock crossovers cannot be built because the original tapped inductors are not available.

I would get driver cores if possible and have fresh re-cones done all around. That way you have a clean slate and a factory fresh driver set. The 2235 can be 2225’s as an example and there are multiple cores for the 2122’s and well.

Some things to also consider are a Charge Coupled network and Aguaplased diaphragms for the 2425’s.

Rob:)

[Earl K]

If I were building up a pair if 4344 I would not go with the stock driver layout. I would go with an inline driver alignment for the 2235, 2122 and the 2425 and keep the 2405 on the side of the lense. I would also offset the woofer in the cabinet and not have it centered like the original cabinet. I would also build the grilles to be set up for a flush baffle and not build the overhangs to help minimize diffraction. I would also relocate the reflex vents away from the midrange driver for the same reason.
http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=20881&stc=1&d=1164554869

Do what RobH has suggested. As a point of fact, " ayaboh " did incorporate most of the same changes into his rearrangement of the layout for the component parts .

Here are two of the "stock" arrangements ( pics courtesy of Giskard ) ; 1st the 4344 , 2nd the 4344mkII ;


http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=20878&stc=1&d=1164554270http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=20879&stc=1&d=1164554349
>< cheers :)

[Earl K]

Here's ayaboh(s)' 4344 plans (parsed; page by page ).

- page 3 is missing because it's too large to upload to this site ( as a pdf ) .

>< cheers :)

pages 1 to 6

[Earl K]

pages 7 to 11

[Earl K]

pages 12 to 16

[Earl K]

pages 17 to 21

[Earl K]

pages 22 to 24

& the missing page 3 ( appearing here as a .png file ) .

http://www.audioheritage.org/photopost/data//500/4344-pg_3_.png

[JeffW]

Other than keeping the height down, what's the benefit of having the tweeter next to the horn instead of above? Looks like reflections off the side of that difuser would cause some problems.

[Robh3606]

Other than keeping the height down, what's the benefit of having the tweeter next to the horn instead of above? Looks like reflections off the side of that difuser would cause some problems.


Hello Jeff

You need to take a look at the vertical polars on the 2307/2308 combo. It gets really narrow at around 10K or so and the 2405 is getting really tight there as well. If you stacked them you could end up with two hot spots depending on the spacing the crossover points and listening distance.

At least this way you can set both drivers up to have them on the same listening axis. If you have listened to a 2307/2308 alone or a 2405 you will soon see that you really need to have them set-up so your ear height is on axis with them. If you don't when you do a simple stand-up sit down test you can clearly hear when you are in or out of the "window".

When I did mine I figured every single monitor that uses a slot has them next too the paired driver even the 4315 uses this configuration. Is it because of the Polars?? Who knows?? Not sure but it made sense to me to keep them that way once I tried to figure out why they were that way. All I can say is they sound just fine used that way.

Take a look at page 5

http://www.audioheritage.org/vbulletin/showthread.php?p=76021#post76021

Rob:)

[JeffW]

Thanks, Rob.

[grumpy]

One -could- mount drivers not perpendicular to the ground to optimize
for a fixed listening distance [even go as far as Wilson's MAXX, or Focal's
Utopia if you wanted to go completely modular with a non-traditional look...
being careful to understand the baffle requirements for the 2308, or effect
without].

Mostly thinking one could leave the basic design alone other than the 2405
location, placing the 2405 at ear level and angling the 2307 up slightly
(small wedge insert).

but if the side-by-side thing works well enough, you sure save on construction
effort and design/build/test/scrap/design/build... time :).

[frablake]

pages 17 to 21
Dear friend
i would like to thank you very much for the pdf you have sent to me.

They will help me a lot in the buiding on the 4344.

If you have any other idea about that, i m waiting more.
Kind regard.

Francis

[frablake]

Hello frablake

If I were building up a pair if 4344 I would not go with the stock driver layout. I would go with an inline driver alignment for the 2235, 2122 and the 2425 and keep the 2405 on the side of the lense. I would also offset the woofer in the cabinet and not have it centered like the original cabinet. I would also build the grilles to be set up for a flush baffle and not build the overhangs to help minimize diffraction. I would also relocate the reflex vents away from the midrange driver for the same reason.

Depending upon what midrange drivers I could get I would consider the 4344Mk 2 crossover if the 2123 was my only option. As far as a crossover the alternates posted in Ian’s Linked posts worked out very well. The stock crossovers cannot be built because the original tapped inductors are not available.

I would get driver cores if possible and have fresh re-cones done all around. That way you have a clean slate and a factory fresh driver set. The 2235 can be 2225’s as an example and there are multiple cores for the 2122’s and well.

Some things to also consider are a Charge Coupled network and Aguaplased diaphragms for the 2425’s.

Rob:)
Hello Robh

I am very interesting by your answear.
But , really i have no idea about that!

Frablake

[Robh3606]

http://www.audioheritage.org/vbulletin/showthread.php?t=6633&highlight=chain

Rob:)

[ayaboh]

Sorry, I haven't been around here lately. I got a mail from Earl K regarding broken links for the 4344 drawings. I have changed server a couple of times, and for some reason these files didn't make it.

Here are the latest revs:
4344-Final.pdf (http://www.orbitalcontractors.no/4344/4344-Final.pdf)
4344-Network.pdf (http://www.orbitalcontractors.no/4344/4344-Network.pdf)
Foilcals.zip (http://www.orbitalcontractors.no/4344/Foilcals.zip)
Material-Layout.zip (http://www.orbitalcontractors.no/4344/Material-Layout.zip)

Mirror: Use these only if the main links are down. This server is on a much slower line.
4344-Final.pdf (http://www.designcut.com/4344/4344-Final.pdf)
4344-Network.pdf (http://www.designcut.com/4344/4344-Network.pdf)
Foilcals.zip (http://www.designcut.com/4344/Foilcals.zip)
Material-Layout.zip (http://www.designcut.com/4344/Material-Layout.zip)

Regards
os

[Earl K]

Thanks os :thmbsup:

Great Work , BTW :D

>< :)

[Uncle Paul]

Thanks os :thmbsup:

Great Work , BTW :D

>< :)

No kidding :applaud:

[duaneage]

This may be redundant but I uploaded the huge 4344 plans to media fire for anyone to download. This is a 39 mb file so grab a cup of coffee for it.

http://www.mediafire.com/?sharekey=b1acde778546ff1390a82c7bb0fad7ade04e75f6 e8ebb871

[frablake]

Hi Sir,
you has send me 4344 plans in PDF.
They are very good for us, because they are in meters scale, and their quality make very easy the work to prepare the cabinet.

Can i ask you if you have the same plans for 4345 ( even if they are very close to 4344) and 4350.

We have the project to build a french collection of 43XX série in Lyon, France. We wanted Theses monitors very rare in France as original as possible of the JBL's items.It is the reason why we wante to build them in 'les règles de l'art" ( in the same way as JBL build them a long time ago)
I am able to open a new thread here, showing how our project is going on.

Kind regards

Frablake


pages 17 to 21

[JeffW]

The 4345 plans (http://www.audioheritage.org/vbulletin/showthread.php?t=11856) are already on this site, you'll have to do the metric conversion work yourself.

I don't see a 4350, but there's plans for the 4355 (http://www.audioheritage.org/vbulletin/showthread.php?t=12037).

[frablake]

Yes , Sir, you'r right.

Thanks.


The 4345 plans (http://www.audioheritage.org/vbulletin/showthread.php?t=11856) are already on this site, you'll have to do the metric conversion work yourself.

I don't see a 4350, but there's plans for the 4355 (http://www.audioheritage.org/vbulletin/showthread.php?t=12037).

[Ian Mackenzie]

Hello Jeff

You need to take a look at the vertical polars on the 2307/2308 combo. It gets really narrow at around 10K or so and the 2405 is getting really tight there as well. If you stacked them you could end up with two hot spots depending on the spacing the crossover points and listening distance.

At least this way you can set both drivers up to have them on the same listening axis. If you have listened to a 2307/2308 alone or a 2405 you will soon see that you really need to have them set-up so your ear height is on axis with them. If you don't when you do a simple stand-up sit down test you can clearly hear when you are in or out of the "window".

When I did mine I figured every single monitor that uses a slot has them next too the paired driver even the 4315 uses this configuration. Is it because of the Polars?? Who knows?? Not sure but it made sense to me to keep them that way once I tried to figure out why they were that way. All I can say is they sound just fine used that way.

Take a look at page 5

http://www.audioheritage.org/vbulletin/showthread.php?p=76021#post76021

Rob:)

I was asked this question recently about the location pf the 2405?.

Some people look at the L300 (I love the look) and wonder why JBL put the 2405 beside the horn?

I agree you would intuitively think that the 2308 lens would get in the way?

Rob has provided a clear and logical answer.

When you read the 4344mk11 manual JBL recommend your ears should be inline with the bottom of the lens.

This makes sense so you in fact do hear the narrowing output of the lens / horn .

If the 2405 was top the horn at a nominal listening distance you may only be in range of the bottom half of the 2405 vertical radiation angle. making it hit and miss hearing those higher frequencies and the air and ambience it does so well.. i.e. 17.5 degrees @16 K hertz.