JBL 4355 Replica

[berga12]

I find out something that could fit...

[Challenger604]

I find out something that could fit...

Good!

[berga12]

If someone has the same issue than me, having a JBL 5235 with a 18db card with Eq for high freq...

here the modification that you have to do to bring this card with Eq into a normal 18db without EQ! I'm going to buy some capacitors and Resistors!

[Doctor_Electron]

Sick !

[berga12]

Today I will try my cardboard on my 5235, I received some Allen bradley Carbon resistance and Holco too, capacitors are Sprague Orange MKP and Wima one.

I find out only HI-Voltage components and 1W resistor, so not much space left on the board, additionally soldering on a 30years old board will cause some issue

but then, I succeed! let see if it will explode or not!

[berga12]

Everything is working! Incredible how natural the sound is, so dynamic and precise, warm and realistic!!!

I was not expecting that from the Crossover JBL5235, I was thinking it's just a piece of crap! For sure there is something better on the market.

I would like to try Bryston 10B, maybe a Dbx venu 360 or even an RME sound board to have a nice DAC and full DSP to work with!

for the moment I keep this setup with the MC2120 (that sometime fails on some Relais, i've to check), today evening I will try also this bad guy with 211 on mid high!!!

[Lee in Montreal]

Oh Sorry Luca!
We don't usualy deal with Russia in North America! That's the way it goes around here...

Why do you say that?

[berga12]

12W tube amp (211 tube,uesugi project) on mid high and Hypex UCD400HR on Low bass is something superb more than enough power need to drive those monsters in home application.

[laszlo]

amazing picture. congratulation with the project.

12W tube amp (211 tube,uesugi project) on mid high and Hypex UCD400HR on Low bass is something superb more than enough power need to drive those monsters in home application.

[laszlo]

Hello

Can you tell me what the original purpose of the metal internal support bracket?

thanks

againAttachment 70604Attachment 70605Attachment 70606Attachment 70607Attachment 70608

[berga12]

If I remember Well was For cieling mount using chains

[dn92]

If someone has the same issue than me, having a JBL 5235 with a 18db card with Eq for high freq...

here the modification that you have to do to bring this card with Eq into a normal 18db without EQ! I'm going to buy some capacitors and Resistors!

Dear berga12,

Nice to see that my work around JBL UREI 5235 (and some of my pictures) is usefull to you ( http://vintage-jbl.forumpro.fr/t3066...-jbl-urei-5235 ). In this topic (In French, but I had the intention to translate it for Lansing Heritage, this is in my big to do list), there is all what I know and found about THE 5235 and its boards.

I made these 4345/4355 boards for a friend who intend to build his own DIY JBL 4355, and I had some difficulties to find the appropriate capacitors with enough precision (try the Panasonic capacitors, see the pictures of the finished board). I made some measurement of these 4345/4355 boards showing the importance of the components precision, see this page: http://vintage-jbl.forumpro.fr/t3066...-jbl-urei-5235.

This board was made from a 18dB board as the original board for 4345/4355:


If you need further help with 5235 (I did some imrovements also) do not hesitate to contact me. The linked topic is in French and if interest I can translate some parts for you.
If you dont have the necessary 18dB board (I've seen that you used a 18dB xxBREQ board, I have made a PCB Eagle file for it ( as well as for the two other cards models).


dn92

[berga12]

Dn92 that looks great!

yes I Would like to build new pcb and try different components with better precision(0,5-1%)

I can manage a bit French Thanks!
I will be contacting you by private message! Thanks

[berga12]

And finally,after 10 months.........thanks to many person of the forum (one in particular), I find out 6 JBL2235h, now time to select 4 of them, and Refoam, still have to decide if it's better to re-sell 2 of them or keep as spareparts.

delivered today to me!



now I can say I've (as I'll refoam them... ) 4355 Replica!

[Lee in Montreal]

Choice is easy. Refoam and keep as spares or build a third 4355 ;-)