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View Full Version : JBL L-77 Crossover Schematic



vifa32144
02-19-2004, 09:48 PM
Can someone send a schematic of the JBL L-77 crossover? That would include cap, coil, resistors, and l-pad hookup.

4313B
02-21-2004, 08:51 AM
JBL LX4-2 Network

vifa32144
02-21-2004, 04:05 PM
Thank you for the JBL L-77 crossover schematic. Do you know what the impedance is for the 3 position switch?

4313B
02-21-2004, 04:22 PM
The three position switch is just a rotary switch, it isn't an L-Pad. The high pass is 3 kHz with -1, -5, and -9 dB of attenuation depending on where the switch is set. The resistors were each rated at 11 watts.

vifa32144
02-21-2004, 09:41 PM
Do you know where to purchase such a rotary switch without trying to buy from JBL?

jcdahl
02-21-2004, 10:51 PM
You can get one from Mouser

http://www.mouser.com/catalog/617/886.pdf

It is an adjustable stop single pole 2 to 12 position switch. Y ou can set it to have three positions.

JCD