JBL 4642A JBL 4642A
JBL 4642A JBL 4642A

JBL 4642A

THX Approved Dual 18" High Power Subwoofer

MFR # 4642A
Contact Us to Order
This item is not currently available to order via our website. Please Contact Us for more information about ordering this item.

JBL 4642A
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

JBL 4642A Documents
Spec Sheet
Based on 0 reviews.

Write a review of the JBL 4642A
Review Guidelines

✓ Explain why you like or dislike the product, focusing your comments on the product's features & functionality and your own experience using the product.

✓ Avoid single-word reviews, bad language, contact information (email addresses, phone numbers, etc.), URLs, time-sensitive material or alternative ordering information.

✓ Avoid comments about non-product related issues such as service and support, resellers, shipping, sales policies, or topics not directly related to the product's features or functionality.

✓ Your review should be approved within a few business days.

✓ We reserve the right not to post any review that does not meet these guidelines.

Title of the review(please limit to 10 words)

Rate this product(your overall rating of this product)

Body of the review

Your Name(nicknames are fine)

Your Email(will not be displayed with the review)

JBL Performance Audio is an authorized JBL dealer.
JBL Professional is one of the world's leading designer and manufacturer of professional loudspeakers for musicians, contracting, touring systems, cinema, surround, recording and broadcast applications. Pro's who know that better sound means better business choose JBL for all their demanding audio needs.
Previous JBL product
<< JBL 4641
Next JBL product
JBL 4642A-GS >>
Brands JBL Cinema Series 4642A Pin This on Pinterest