The JBL® 4307, a home version of the monitor loudspeakers favored by recording studios, is compact yet powerful. This full-range, three-way speaker is small – just 21-1/2 inches (545 millimeters) high, 12-7/8 inches (328 millimeters) wide and 11-3/4 inches (300 millimeters) deep, and weighing just 36.8 pounds (16.7 kilograms) – but it re-creates music with the power, dynamics and accuracy that the JBL brand has delivered to audio virtuosos for over 50 years. The system’s 1-1/2-inch (38-millimeter) tweeter features a tangential ring diaphragm mounted on a cast-aluminum horn for reproduction of accurate high frequencies up to 45kHz. A 5-inch (125-millimeter), polymer-coated, pure-pulp midrange speaker delivers dynamic performance in reproducing the human voice, even at high playback volumes. And a pure-pulp, 10-inch (250-millimeter) cone woofer offers natural-sounding, undistorted low tones. Built-in level 1.5kHz and 6.5kHz attenuators let you to adjust the midrange and high-frequency performance to match your personal tastes. The recommended amplifier power is 150 watts, with a resultant frequency response of 45Hz – 45kHz (–6 decibels) and sensitivity (at 2.83 volts / 1 meter) of 91 decibels. And with a walnut-lacquer finish and blue grille, the 4307 looks as great as it sounds.



  • 25 – 150 watts suggested amplifier range
  • 10" (250mm) low-frequency transducer for low-distortion, natural sound
  • 5" (125mm) midrange transducer for smooth midrange reproduction
  • 1-1/2" (38mm) high-frequency transducer for sparkling HF response
  • Front-mounted port for extended low-frequency response
  • Continuously variable midrange and high-frequency attenuators to tailor overall sound
  • JBL sound: a heritage of excellence

JBL 4307 Home Monitor Loudspeakers

  • Description: 3-way Studio Monitor Loudspeaker

    Low-frequency Transducer: 10-inch (250mm) white pure-pulp cone woofer

    Mid-frequency Transducer: 5-inch (125mm), polymer-coated pure-pulp cone with double-pleated cloth edge

    High-frequency Transducer: 1.5-inch (37.5mm) tweeter with dual-layer laminated tangential ring diaphragm

    Frequency Response: 45Hz – 45kHz (-6dB)

    Sensitivity: 91dB (2.83V/1m)

    Maximum Recommended Amplifier Power: 150 Watts RMS

    Crossover Frequencies: 1.5kHz, 6.5kHz

    Nominal Impedance: 6 Ohm

    Controls: Continuously variable midrange and high-frequency attenuators

    Dimensions (H x W x D): 21.45 x 12.9 x 11.8" (545 x 328 x 300mm)

    Weight: 36.6 lbs (16.6kg)

    Finish: Walnut veneer with blue baffle and blue grille

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