DIY project for 4312

[Max]

Hello everybody,
I'm a newbie from France. I project to make a 4312 clone.
For the instant, I have only the 2212 woofers. Due to difficulties to find elements of this speaker in my country, your help will be appreciated.
Does anybody have plans of the enclosure and schématics of the 3112C crossover ?
on another side to facilitate the job, if you have something you want to sell according to that, I can study...
Regards

[Frenchie]

salut
ici il y a des JBL d'occasions… :

http://prix.audiofanzine.com/services/petites_annonces/index,action,play,idmarque,178.html

Quant au HP grave, c'est plutôt le 2213H dans la 4312.
Il n'est absolument pas filtré d'ailleurs.
Tu trouveras sur ce site ici en cherchant dans le forume le schéma du filtre (très simple).

Tu peux même acheter les éléments chez JBL en neuf (pour faire une 4312A)

[Max]

Salut et merci pour le tuyau.

Mes 2212 équipaient en fait les 4310 derniers modéles et les 4311. Dans mes recherches, JBL parle bien de fréquences de filtrage 1500-6000. Comme je n'ai jamais vu ce matériel de prés, je suis dans les hypothéses.
Visiblement, les composants que commandent les deux boutons ont peu à voir avec un filtre, c'est simpliste.
Quant à acheter du neuf, question budget : :banghead:


salut
ici il y a des JBL d'occasions… :

http://prix.audiofanzine.com/services/petites_annonces/index,action,play,idmarque,178.html

Quant au HP grave, c'est plutôt le 2213H dans la 4312.
Il n'est absolument pas filtré d'ailleurs.
Tu trouveras sur ce site ici en cherchant dans le forume le schéma du filtre (très simple).

Tu peux même acheter les éléments chez JBL en neuf (pour faire une 4312A)

[Fangio]

Hello everybody ... Does anybody have plans of the enclosure and schématics of the 3112C crossover ?

The 3112C schematic is in here:
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/4312%20ts.pdf

and in this veeery useful thread the invaluable work of Giskard, and tech sheets of more 4312x:
http://audioheritage.org/vbulletin/showthread.php?t=5784

Hth, good luck for your project.
F.

[Max]

Tanks a lot Fangio. I was turning around without results. so, I will be able to begin something.





The 3112C schematic is in here:
http://manuals.harman.com/JBL/HOM/Technical%20Sheet/4312%20ts.pdf

and in this veeery useful thread the invaluable work of Giskard, and tech sheets of more 4312x:
http://audioheritage.org/vbulletin/showthread.php?t=5784

Hth, good luck for your project.
F.

[boputnam]

And, if you were me, you might think of replacing the 2213H with the 128H. There aren't many mods to factory JBL that I endorse, but this one I've done and was real pleased with the results. I just was never overwhelmed with the response of the 2213H. But this is a purely arbitrary, opinion based, aural judgement.

I was young. I tried it. It sounded better, and is now the configuration of my 4312L/R.

[Max]

Thank you for your opinion. All is perfectible I know.
I have the 2212 coming from late 4310 and 4311, it's the main part, to get them was difficult and expensive. I thus will use them in the project and will then see with use if the unit is satisfactory before modifying something. I have a lot of job before...
I have yet a crossover, not a JBL one, with 600-6000 dividing frequencies, no possibilities to vary. What do you think the result will be ?