JBL 4602B
The JBL 4602B is a two-way, horn-loaded loudspeaker built for sound reinforcement, specifically as a stage monitor for musicians. Documentation on this model is thin. What survives lives mostly in forum discussions among owners, not in official JBL literature. No production years, original price, or factory spec sheet have surfaced. Period trade coverage documents JBL loudspeaker installations in venues such as shopping malls and university facilities (Sound and Communication, Nov 1988, p.52).
Here is what the record does show. The 4602B uses a 15-inch E155 woofer with a 4-inch voice coil, paired with a horn-loaded high-frequency driver. The crossover is a simple 12 dB/octave passive network at 1.2 kHz. Owners report sensitivity around 100-101 dB/w/m, which fits the job. These were built to get loud on stage. One forum user who ran them as monitors for years said they "get LOUD and sound great doing it," though opinions on the horn differ. One listener found it "very aggressive, harsh on the ears," while another called the 4602B "pretty smooth and musical" with good bass response for a ported cabinet. A third owner mentioned the cabinet resonates and colors the sound.
A JBL Pro representative, quoted on the Lansing Heritage forum, described the 4602 as "a 2-way monitor loudspeaker system" and "the direct descendant of the 4310/4311 studio monitors," designed for use as a stage monitor. The same source indicates the 4602 was later replaced by the 4602B. A pair of 4602B wall-mount speakers appeared on eBay in used condition, listed at $1,250.00.
The driver complement is a point of some confusion. The SpeakerPlanet forum consistently identifies the E155 woofer in the 4602B. Lansing Heritage says the earlier 4602 used an LE15A woofer with a 2410 driver and 2311 horn. The 4602B may have brought a driver change from the 4602, but the record doesn't explicitly confirm that. The E155 is the confirmed 4602B woofer, and the LE15A/2410/2311 combination belongs to the earlier 4602.
- Type: 2-way, horn-loaded, ported cabinet
- Woofer: 15" E155, 4" voice coil
- Crossover: 12 dB/octave passive at 1.2 kHz
- Sensitivity: ~100–101 dB/w/m (owner-reported)
- Intended use: stage monitor
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