JBL 4642A JBL 4642A

Product Information
Overview The JBL Model 4642A is a high quality subwoofer system, featuring an advanced technology 460 mm (18 in), low frequency transducers mounted in a direct radiator, bass-reflex enclosure for smooth response to the lowest audible frequencies. The 4642A is ideal for low-frequency augmentation of either analog or digital soundtracks in motion picture theaters and for general sound reinforcement applications.

The 2241H transducer utilizes the patented Vented Gap Cooling (VGC) process*, which pumps air through the magnetic gap and directly over and around the voice coil, providing immediate heat transfer and a reduction in operating temperature. This increases power handling while reducing power compression.

Through the use of computer-aided magnet optimization and analysis techniques, JBL engineers were able to optimize magnet weight, flux density and field saturation, resulting in a 2.6 kg (6.5 lb) reduction in overall driver weight and a significant reduction in harmonic distortion. This magnet structure offers much of the weight advantage of rare earth magnet structures without the prohibitive cost, enabling the system to carry a 1200 watt continuous AES pink noise power rating.


  • 1200 Watts Continuous Pink Noise, 2400 Watts Continuous Program Power Handling

  • Usable response to 22 Hz (-10 dB, no EQ), flat to 22 Hz (-3 dB) with External EQ

  • 2241H VGCTM Vented Gap Cooled Drivers- High Sensitivity- Low Power Compression- High Maximum-SPL Capability- Low 2nd and 3rd Harmonic- Distortion- Symmetrical Field Geometry SFGTM- Magnet Structure- Long Excursion Capability

  • Approved by Lucasfilm, Ltd. for THX installations


  • TRANSDUCERS: Two JBL Model 2241H 460 mm (18 in) Low Frequency Transducers


  • Rated Impedance: 4 ohms

  • Minimum Impedance: 3.2 ohms

  • POWER HANDLING CAPABILITY:Continuous Pink Noise: 1200 WattsContinuous Program: 2400 WattsPeak Power: 4800 Watts


  • Axial Sensitivity:50 Hz to 500 Hz; 101 dB, 1W @ 1m40 Hz to 100 Hz; 100 dB, 1W @ 1m

  • Power Compression:At -10 dB power (120 W): 0.8 dBAt -3 dB power (600 W): 2.6 dBAt rated power (1200 W): 4.3 dB

  • FREQUENCY RESPONSE:Lower Frequency Limits (no EQ):-10 dB: 22 Hz-3 dB: 35 HzLower Frequency Limits (with EQ):-10 dB: 20 Hz-3 dB: 22 Hz

  • Recommended Crossover Frequencies:High-pass: 20 Hz, 12 dB/octave or greaterLow-pass: 80 Hz to 150 Hz, 12 dB/octave or greater
  • Distortion:2nd harmonic: <2%3rd harmonic: <2%

  • System Polarity: EIA Standard. Positive voltage to RED terminal produces forward cone motion.

  • Input Connectors: Color-coded push terminals

  • Net Weight: 98 kg (216 lbs.)

  • Shipping Weight: 109 kg (240 lbs.)


  • Materials and Finish: 19 mm (3/4 in) particle board with 25 mm (1 in) baffle and back panel. Extensive bracing on all panels

  • Enclosure Tuning Frequency: 25 Hz

  • Net Internal Volume: 506 liters (18 cu. ft)

  • Dimensions: 762 mm x 1219 mm x 610 mm, H x W x D 30 in x 48 in x 24 in

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Brand JBL
Model 4642A
Part Number 4642A
Product Category Unpowered Subwoofers, Install & Contracting Speakers
Unit of Measure EACH
Shipping Weight 265.74 lbs.
JBL Performance Audio is an authorized JBL dealer.
Headquartered in Northridge, California, JBL is one of the world's leading speaker designers and manufacturers. They produce gear for a number of uses like, loudspeaker amplification, recording, broadcasting and more. JBL also designs products for all types of users including: home theater enthusiasts, touring musicians, and professional sports arenas.
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