JBL 4313BWX (1982)
The 4313BWX shows up in JBL's 1982 product line as a three-way monitor. The documented record is genuine but modest. It comes largely from a March 1982 review in Audio magazine and a JBL system guide listing, with additional context from a September 1980 issue of High Fidelity (September 1980, p.107). The review describes a bookshelf-size acoustic-suspension enclosure holding three drivers - a 12" woofer, a 5" midrange, and a 1" tweeter. It also notes the speaker was sold as mirror-image pairs, so the left and right cabinets were true opposites rather than identical boxes.
The specs that survive are consistent across sources. Frequency response is rated at 43 Hz to 21 kHz (±3 dB), with crossover points at 1000 Hz and 3500 Hz. It's an 8-ohm speaker, rated for 10 to 150 watts of continuous program material, with a sensitivity of 89 dB SPL at 1 meter with a 1-watt input. The enclosure is 1.3 ft³ internally. The cabinet measures 24.75" H × 15" W × 12.25" D and weighs 42 lbs. Wall mounting was apparently a legitimate option, per a user comment on vintagespeakers.org.
Audio's reviewer was fairly direct: the 4313BWX is a very clean, accurate, and musical speaker, and not one for listeners who prefer a warm or colored midrange. The low end is solid and articulate. The midrange is extremely clean and detailed. One owner who posted on vintagespeakers.org after hearing a pair in a studio found the speakers extremely accurate and revealing. No original price has surfaced in the research, and nothing is documented about common failures, repairs, or spare parts availability.
- Type: Three-way monitor, acoustic-suspension enclosure
- Drivers: 12" woofer, 5" midrange, 1" tweeter
- Frequency response: 43 Hz – 21 kHz (±3 dB)
- Crossover: 1000 Hz / 3500 Hz
- Impedance: 8 ohms
- Power rating: 10–150 watts (continuous program)
- Sensitivity: 89 dB SPL (1W/1m)
- Dimensions: 24.75" H × 15" W × 12.25" D
- Weight: 42 lbs
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