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Description
JBL 4312G 12-inch 3-Way Studio Monitor
The JBL 4312G is a modern take on the iconic 12-inch, 3-way monitor lineage that began in 1968. Built for serious listening rooms, it combines a pure-pulp 12″ woofer, a 5″ polymer-coated midrange, and a 1″ magnesium/aluminum alloy dome tweeter with a waveguide. Front-ported bass reflex design, mirror-imaged pairs, and user-adjustable MF/HF attenuators deliver the classic JBL studio sound with real placement flexibility at home.
Why youll love it
- Classic JBL 12″ three-way layout with authoritative dynamics and scale.
- Front-firing port for easier placement near walls or on stands.
- High- and mid-frequency level attenuators to fine-tune your room and taste.
- Mirror-imaged stereo pairs for precise imaging and a stable soundstage.
- Advanced crossover network for seamless handoff between drivers.
- Works with a wide range of amplifiers (10200 W RMS recommended).
Technical Specifications
| Design | 3-way, bass-reflex (front-firing port) |
| Low-Frequency Driver | 12″ (300 mm) pure-pulp cone woofer |
| Mid-Frequency Driver | 5″ (125 mm) polymer-coated pure-pulp cone (JM125PC-8) |
| High-Frequency Driver | 1″ (25 mm) magnesium/aluminum alloy dome tweeter with waveguide (054ALMg-1) |
| Crossover Frequencies | 640 Hz, 5 kHz |
| Frequency Response | 44 Hz 40 kHz (-6 dB) |
| Sensitivity | 90 dB (2.83 V/1 m) |
| Nominal Impedance | 6 |
| Recommended Amplifier Power | 10 200 W RMS |
| User Controls | HF and MF level attenuators |
| Inputs | Five-way binding posts |
| Finish / Grille | Black woodgrain cabinet / black grille |
| Dimensions (H W D) | 597 362 305 mm (23.5″ 14.25″ 12″) |
| Weight | 23.8 kg (52.4 lb) each |
| Recommended Stands | JBL JS-120 (sold separately) |
Placement Tips
- Use solid 1824″ stands; toe-in slightly until the center image locks.
- Start with the MF/HF attenuators at their detent (0 dB) and adjust by ear.
- Allow ~1530 cm clearance behind the cabinet for the front port to breathe.
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