JBL 4690(4690A)

Commentary

Cabaret series speaker system developed for SR.

The low range is equipped with E140 which is a 38 cm cone type woofer.

A horn type tweeter that combines driver unit 2410 and exponential horn 2306 is mounted in the high range.

A continuously variable attenuator is installed for high frequency.

The enclosure uses a rigid multi-layer plywood of 19 mm thickness and is externally coated with polyurethane paint for increased strength and high durability.
In addition, a front cover to protect the net and grill cloth during transportation, a polycarbonate corner guard of convenient shape when using the stack, and a carrying handle are taken into consideration.

It is listed as 4690A in the 1981 catalog.

Model Rating

Method	2-way, 2-speaker, bass reflex system
Units Used	For Low Band : 38 cm Cone Type (E140) For High Frequency : Horn Type (2410 + 2306)
Frequency characteristic	40 Hz to 20 kHz
Allowable input	400W (continuous program)
Impedance	8 Ω
Sound pressure level	103dB/W/m
Crossover frequency	1.5kHz
Enclosure volume	127L
External dimensions	Width 512x Height 767x Depth 478 mm
Weight	47.3kg