3-way 12" (300mm) Bookshelf Loudspeaker

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The JBL® 4312 E studio monitor is the direct descendent of the legendary Model 4310, the original JBL monitor that forever changed audio recording, introduced in 1968. As you would expect of a true JBL studio monitor, the 4312 E delivers crisp, powerful bass at all listening levels with a massive 300mm (12-inch) woofer driven by a Differential Drive® (U.S. patent no. 5,748,760 and other patents pending) dual 75mm (3-inch) voice-coil assembly. A 125mm (5-inch) pure-pulp cone and 25mm (1-inch) copper voice coil with Kapton® bobbin realistically reproduce the full dynamics of vocal performances with low distortion, even at the highest listening levels. A 25mm (1-inch) tweeter with a magnesium/ aluminium alloy dome extends HF response far beyond the audible range of the human ear. Built in mirror-image pairs to create the detailed, coherent stereo soundstage that studio monitors must, the JBL 4312 E exceeds the expectations of critical listeners and music professionals alike, providing a listening experience of such richness and subtlety that it cannot be compared to anything but a live performance.


Print Specifications
Low-frequency transducer
300mm (12") neodymium Differential Drive cone driver with dual 75mm (3") voice coils utilizing patented Low TCR Alloy Edge-Wound wire, castaluminium frame and an Aquaplas-coated cone (2213Nd-2)
Midrange transducer
125mm (5") polymercoated, pure-pulp cone driver (105H-1)
High-frequency transducer
25mm (1") magnesium/aluminium alloy dome (054ALMg-1)
Recommended amplifier power
200 watts RMS
Frequency response
40Hz – 40kHz (–6dB)
Nominal impedance
6 ohms
93dB (2.83V/1m)
Crossover frequencies
2000Hz, 5000Hz
Attenuators for MF and HF drivers
Enclosure type
19mm (3/4") particle board (PB) with 19mm (3/4") medium-density fibreboard (MDF) baffle, ported, shipped in mirror-image pairs
Connector type
Five-way binding posts
Pebble-texture black vinyl
Grille colour
Dimensions (H x W x D)
597mm x 362mm x 300mm (23-1/2" x 14-1/4" x 12")
17.9kg (39.5 lb)