4645C (discontinued)

4645C Single 460 mm (18 in.) Subwoofer System

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4645C Single 460 mm (18 in.) Subwoofer System

The JBL Model 4645C is a high quality subwoofer system, featuring an advanced technology 460 mm (18 in), low frequency transducer mounted in a direct radiator, bass-reflex enclosure for smooth response to the lowest audible frequencies. The 4645C is ideal for low-frequency augmentation of either analog or digital soundtracks in motion picture theaters and for general sound reinforcement applications.


  • 800 Watts Continuous Pink Noise, 1600 Watts Continuous Program Power Handling
  • Usable response to 22 Hz (-10 dB, no EQ), flat to 22 Hz (-3 dB) with External EQ
  • 2242H SVGTM Super Vented Gap Cooled Driver – High Sensitivity – Minimal Power Compression – Highest Maximum-SPL Capability – Extremely Low 2nd and 3rd – Harmonic Distortion – Symmetrical Field Geometry SFGTM – Magnet Structure – Extended Excursion Capability
  • Approved by Lucasfilm, Ltd. for THX® installations


  Version Language Size Uploaded
file type icon 4645c Spec Sheet
updated: 10月 2020
    156KB 10月 2020
file type icon 4000 Series Declaration of Conformity
updated: 10月 2020
    33.4KB 10月 2020
file type icon Cinema Sound - 4000 Series Declaration of Conformity
updated: 10月 2019
    144KB 10月 2019
Tech Notes
file type icon Tech Note: Polarity Conventions
updated: 10月 2019
    55KB 10月 2019
Information documents
file type icon Cinema CD
updated: 10月 2019
    21.9MB 10月 2019

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Parts & Service


Frequency Range (±3 dB) 22 Hz - 100 Hz
Frequency Range (-10dB) 20 Hz - 500 Hz
Rated Impedance 8 ohms
Minimum Impedance 7.2 ohms
Power Handling Capability -
Continuous Pink Noise 800 watts
Continuous Program 1600 watts
Peak Power 3200 watts
Axial Sensitivity 50 Hz to 500 Hz; 99 dB, 1W @ 1m 40 Hz to 100 Hz; 97 dB, 1W @ 1m
Power Compression -
At -10 dB power (80 W) 0.6 dB
At -3 dB power (400 W) 2.0 dB
At rated power (800 W) 3.3 dB
Net Weight (each) 138 lbs (63 kg)
Dimensions (H x W x D) 1010 mm x 674 mm x 450 mm 39¾ in x 26½ in x 17¾ in
Power Handling (2Hr AES Rating) 800 W
Sensitivity 97 dB
Maximum SPL (1m) 128 dB
Nominal Impedance 8Ω


HARMAN Professional Solutions:

4645C (discontinued)

4645C Single 460 mm (18 in.) Subwoofer System