The 4312MII is a 5.25-inch, 3-way high-performance Studio Monitor that truly embodies JBL’s 70-year legacy of world-class audio. Featuring a 5.25-inch pure pulp woofer for powerful lows, a 2-inch pure pulp midrange for accurate voice reproduction, and a 0.75-inch titanium dome tweeter for crystalline highs, the 4312MII delivers vivid imaging for the full audio spectrum. Its ultra-compact design means it fits easily on your bookshelf, or on your wall with the optional mounting bracket. Two finish options, black ash with black grille and walnut natural wood with blue grille, allow it to blend elegantly into any decor.

Main Features

  • 5.25-inch pure pulp cone woofer
  • 2-inch pure pulp midrange
  • 0.75-inch titanium dome tweeter
  • Bass-reflex design with front-firing port
  • Adjustable midrange and high-frequency attenuators
  • Black ash and walnut natural wood finishes


Print Specifications


3-way Studio Monitor Loudspeaker

Low-frequency Transducer

5.25-inch (300mm) pure pulp white cone woofer

Mid-frequency Transducer

2-inch (125mm) pure pulp midrange

High-frequency Transducer

0.75-inch (25mm) titanium dome tweeter


Bass-reflex via front-firing port

Frequency Response

55Hz – 50kHz (@-6dB)


92dB (2.83V/1m)

Power Handling

75 Watts RMS

Crossover Frequency

7kHz, 12kHz


6 Ohm


MF and HF attenuators


Gold-plated five-way binding posts

Dimensions (H x W x D)

11.8 x 7.1 x 7.08 inches (300 x 181 x 180mm)


8.8 lbs (4.0 kg)


Black Ash with Black Grille, Walnut with Blue Grille