View Full Version : Crossover schematic for 4425?

08-19-2003, 01:25 PM
Does anybody have a schematic for the 4425 Network?

I think its the 65934-00.


08-19-2003, 01:35 PM
Try this:


08-19-2003, 01:57 PM
Thanks Giskard!

You are the fastest;)

But are you shure? I meant the 4425 with the 2416 Driver and th 2342 Horn.

08-19-2003, 02:45 PM

Youre right. As always and I was blind:banghead:


08-19-2003, 02:53 PM
Now some details:

L1 seems to be a inductance (coil) with fixed resistance. Where can I get this?

What is the resistance of the L-Pads? R201 and 202

Thanks for help!

08-19-2003, 03:31 PM
"L1 seems to be a inductance (coil) with fixed resistance. Where can I get this?"

I don't think JBL has any of these anymore. They are little 1.0mH air core inductors wound on plastic square bobbins and they have a DCR of 7.5 ohms. You should be able to get them custom wound or wind them yourself.

"What is the resistance of the L-Pads? R201 and 202"

I'm not sure. Call Dave at Pro Parts? Or send their support an email. They need to post a readable tech sheet for that system anyway...


08-19-2003, 03:40 PM
I am pretty sure they are 8 ohms Attached is a clean copy of the techsheet with the part numbers for the pots.

08-19-2003, 03:46 PM
I downloaded this unreadable techsheet to:(

But thanks to Rob I now have a readable:D

08-20-2003, 06:10 AM
I bought one of these coils of the same value 1.0 and 7.5 dcr from jbl pro just two weeks ago for a L46 that I am building. It cost $13.00. If you need the part number I can look it up on Friday when I get home.


08-20-2003, 06:52 AM

I've posted this inductor several times before in previous forums, I don't see it anywhere on this particular version of the forum so here it is again:

57129 - 1.0 mH 7.5 ohm - $11.31 from Pro Parts

Here's the other important coil that I've posted at least a dozen times, alas, all on previous versions of the forum:

56138 - 3.5 mH 7.5 ohm - $15.63 from Pro Parts

08-20-2003, 09:21 AM
Ok, call me stupid but:

Why canít I take one 1 mH coil in series with a 7,5 Ohm resistor?

08-20-2003, 09:59 AM
How about a 1.0 mH coil having a 0.5 ohm DCR in series with a 7.0 ohm resistor?


Here, this will work -



08-20-2003, 12:03 PM
Again Thanks!

Now I can start to rebuild.

Here is an link to an excellent site for X-over and speaker components.

It's switchable to english and the ship overseas.


08-20-2003, 01:19 PM
Ok, call me stupid but:

I don't see where to switch it to English :D

08-20-2003, 01:24 PM
I don't think you're stupid - I don't see it either, and gave-up, just shy of Registering! ;)

08-20-2003, 02:29 PM
Sorry bur I swear they had a button before.....:mad: :mad:

Today is not my Day. I will try to find out.

Of course youre not stupid:D

08-20-2003, 02:54 PM
Cool! Because my German stinks! :p

Hey, I was just following your lead on the "stupid thing". Your question about the inductor/resistor wasn't stupid either.

I think the number of questions that should have been asked but weren't because people thought they would be considered stupid has far surpassed the number of McDonald's hamburgers sold... :p

03-18-2009, 11:45 PM
Sorry bur I swear they had a button before.....:mad: :mad:

Sorry about dredging up this old thread...:o:

(Today I went to page 149 of this forum and started working my way forward. Learning all the way... This thread is on page 143.)

While I"m sure you must have mentioned this elsewhere, there IS a button to change to English, in the top right, it looks like two little flags, one German, one British.;) Seems pretty slow from here, maybe next time I am in Germany, I will try again.

Surprisingly, the links to PE still work after almost 6 years!:applaud: