JBL PRX312MD is a 12-inch portable two-way speaker system designed for stage monitoring at live performance or speech.
For the low ends, PRX312MD uses a premium 12-inch low frequency driver with a edge-wound ribbon voice coil of 2 ½ inch (64mm) in diameter to bring the system solid bass, high efficiency and large power handling capabilities. A JBL 2412 1-inch ferro-fluid cooled compression driver with titanium diaphragm provides the system with clean and warm high notes and uncompromised reliability. JBL SonicGuard™ technology improves system stability by protecting the high frequency driver from excessive power without interrupting the show.
Apart from the drivers, fault-free performance of the system also relies on the precision-crafted crossover network, which feeds the two drivers with clear cut frequencies with minimum overlap and is capable of handling high power with its high-voltage capacitors and inductors. The patented Progressive Transition™ waveguide mounts on top of the tweeter and provides the system with superior coverage control, reduced distortion and smoother frequency response.
PRX312MD encloses all the acoustic components in a rugged cabinet constructed from 15mm MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for extreme durability and improved low frequency response. Two all-steel handles are integrated to sides of the case to make transport and setup easier.
A 36-mm socket allows PRX312MD to be mounted on a speaker pole and to work as a main or fill. The socket supports either up-straight standing or 10° tilting, helpful when the audience coverage needs to be uniformed. For the front of the speaker, a dent-resistant grille made from 18-gauge perforated steel protects the components inside from damage on the move or during the show.
| System Type | 12” 2-way stage monitor |
| Frequency Range (-10 dB) | 60 Hz – 16 kHz |
| Frequency Response (±3dB) | 70 Hz – 12 kHz |
| Sensitivity (1w@1m) | 99 dB SPL |
| Nominal Impedance | 8 Ω |
| Power Capacity | 250 watts |
| Peak Power Capacity | 1000 watts |
| Recommended Amplifier Power | 250 – 500 watts @ 8Ω |
| Maximum SPL | 129 dB |
| Crossover Frequency | 1.8 kHz |
| Coverage | 90° × 50° |
| Dimensions (H × W × D) | 567 mm × 381 mm × 323 mm (22.3 in × 15.0 in × 12.7 in) |
| Net Weight | 16.7 kg (36.8 lbs) |
| Shipping Weight | 20.3 kg (44.8 lbs) |
| HF Driver | JBL 2412 1” exit compression driver mounted on Progressive TransitionTM Waveguide |
| LF Driver | JBL M112-8 |
| Input Connector | Neutrik Speakon® NL-4 (×1)；1/4” TS phone jack (×1); parallel |
| Enclosure Construction | 15 mm (0.6 in) MDF (Medium Density Fiberboard) with glued and mechanically fastened joint detail; black painting. |
| Grille | 18-gauge, powder-coated steel |
| Mounting & Suspension | 36 mm, dual-angle pole-mount socket; 9×M10 suspension points |
