The JBL® 4312 E studio monitor is the direct descendent of the legendary Model 4320, 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.


  • Low-frequency transducer: 300mm (12") neodymium Differential Drive cone driver with dual 75mm (3") voice coils, cast-aluminium frame and an Aquaplas-coated cone (2213Nd-2)
  • Midrange transducer: 125mm (5") polymer-coated, 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
  • Sensitivity: 93dB (2.83V/1m)
  • Crossover frequencies: 2000Hz, 5000Hz
  • Controls: 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
  • Finish: Pebble-texture black vinyl
  • Grille colour: Black
  • Dimensions (H x W x D): 597mm x 362mm x 300mm (23-1/2" x 14-1/4" x 12")
  • Weight: 17.9kg (39.5 lb)