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sgaggy
05-15-2007, 09:18 AM
ciao,i want now if i use this electronic crossover for my jbl 4343b,is this an adeguate card for my speakers.
grazie vito.

speakerdave
05-15-2007, 05:30 PM
That number is not (I believe) the number of a particular crossover circuit, but rather of the boards that are used for the circuits, or maybe even a batch number. I have a bunch of those cards and never have been able to figure out what those numbers are.

The dedicated card for the 4343 is the 52-5140; the number may not appear on the card. I think it could be used for the 4343b. It will be very difficult to find, but can be made if you can get hold of a 12 dB/octave card (cards for 18 dB/octave are different) and load it with the capacitor and resistor values that you will find in the manual for the 5235 here:
http://www.jblproservice.com/pdf/Vintage%20JBL-UREI%20Electronics/JBL-5235%20manual.pdf

David

Edit: Photos of the two types of cards can be seen here--the 12 dB card is on the right:
http://www.audioheritage.org/vbulletin/showthread.php?t=15302&highlight=cards