JBL 4892

The JBL 4892 is a professional cinema loudspeaker. It is a two-way, vented system built around dual 15-inch woofers and a 1-inch titanium compression driver on a rotatable 110° x 40° horn. It was designed for surround-channel duty in movie theaters, as part of JBL Professional's cinema line. The cabinet is 18 mm birch plywood with a black polyurethane texture and a perforated steel grille. It measures 44 x 20 x 20 inches and weighs just under 95 pounds. Connections are Neutrik Speakon NL4 and screw terminals.

The spec sheet, drawn from JBL Professional's product documentation, lists a frequency response of 50 Hz to 18 kHz, 300 W continuous pink noise power handling (600 W program), sensitivity of 98 dB at 1 W/1 m, 8 ohms nominal impedance, and a 1.2 kHz crossover point. The waveguide rotates, so the cabinet can be mounted horizontally or vertically without compromising coverage.

Don't mix it up with the JBL 4892A. That one is a separate model with a single 15-inch driver, a 60 Hz - 18 kHz response, 250 W continuous rating, 96 dB sensitivity, and a 1.6 kHz crossover. The two get conflated in passing references, but they are not the same speaker.

The period record on the 4892 is mostly incidental. Mix Magazine (October 1993, p.193) noted the Array Series' light weight being put to good use in a delay system where a cluster of three 4892s was flown. Sound and Communication (January 1992, p.18) mentioned the model in the context of signal processing. These are passing mentions, not reviews. No sustained critical assessment of the 4892 appears to have been published.

No production years, original pricing, or owner documentation have surfaced. What survives is a solid professional cinema speaker with clear specs and a modest footprint in the live-sound trade press.

Type: 2-way, vented cinema surround loudspeaker
LF: Two 15" drivers · HF: 1" titanium compression driver on 110° x 40° rotatable horn
Frequency response: 50 Hz – 18 kHz
Power: 300 W continuous pink noise (600 W program)
Sensitivity: 98 dB (1 W/1 m) · Impedance: 8 ohms · Crossover: 1.2 kHz
Dimensions: 44.0" W x 20.0" H x 20.0" D · Weight: 94.8 lb
Connectors: Neutrik Speakon NL4, screw terminals