View Full Version : 3155 crossover network

Mike C
05-10-2003, 05:29 PM
Hi guys, does anyone know where I may be able to purchase a pair of 3155 networks ( genuine JBL ) ?

05-27-2003, 01:10 PM
Originally posted by Mike C
Hi guys, does anyone know where I may be able to purchase a pair of 3155 networks ( genuine JBL ) ?
Good luck. i contacted JBL a while ago asking the sme thing they had 1 crossover left I think they wanted 460.00!!

05-27-2003, 01:48 PM
Why wouldn't you just build your own?

05-27-2003, 02:17 PM
Originally posted by Giskard
Why wouldn't you just build your own?

I was just curious about it. I will build them

05-29-2003, 11:48 AM
I meant Mike C :)

Mike C
05-29-2003, 01:52 PM
Hey Giskard, what kind of money would it cost me to get someone kind you to build these things for me?

Mr. Widget
05-29-2003, 05:54 PM
A number of months ago after discovering that the autoformers used in the 3155 crossover were no longer available from JBL Parts or anywhere else I asked for help on this forum.

Giskard came to the rescue and with the help of Greg Timbers (original designer of the 3155). Together they came up with an equivalent circuit replacing the autoformers with R-L networks.

02-22-2014, 07:30 AM
Has been awhile from this thread but if this message goes through! I would need help to find a clear schematic and a list of components.
building a pair of 4355 and the network is my only component missing.

thanks for any help!

02-22-2014, 09:00 AM

Mr. Widget
02-22-2014, 09:18 AM
http://www.jblproservice.com/pdf/Studio Monitor Series/4355.pdf
Unfortunately that network requires specific tapped autoformers which are no longer available. If one has the patience to search these forums there are equivalent networks posted... I don't have the time or patience to do the searching though.


02-22-2014, 10:13 AM
Here's one of them http://www.audioheritage.org/vbulletin/showthread.php?32358-4345-4355-networks