View Full Version : 4691 et. seq. network evolution

12-21-2004, 05:20 PM
Esoteric, perhaps, but a little research uncovered this interesting evolution of network topology for JBL's workhorse Sound Reinforcement two-way:

4691B (http://www.jblproservice.com/pdf/Cabaret%20Series/4691B.pdf) Anybody have a READABLE version? L-Pad attenuation.

SR4725 (http://www.jblproservice.com/pdf/SR-Series/SR4725.pdf) Attempts to balance drivers, an attenuation switch, lower Xover frequency for 2226H?

SR4725A (http://www.jblproservice.com/pdf/SR-Series/SR4725A.pdf) Fixed attenuation, add Neutrix.

SR4725X (http://www.jblproservice.com/pdf/SR-X%20Series/SR4725X.pdf) Back home again, no attenuation, 1/4" inputs GONE.

12-21-2004, 05:59 PM
"Anybody have a READABLE version?"