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.
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| Frequency Range (±3 dB) | 22 Hz - 100 Hz |
| Frequency Range (-10dB) | 20 Hz - 500 Hz |
| Rated Impedance | 4 ohms |
| Minimum Impedance | 3.2 ohms |
| Power Handling Capability | - |
| Continuous Pink Noise | 1200 Watts |
| Continuous Program | 2400 Watts |
| Peak Power | 4800 Watts |
| OUTPUT CAPABILITY | - |
| Axial Sensitivity | 50 Hz to 500 Hz; 101 dB, 1W @ 1m 40 Hz to 100 Hz; 100 dB, 1W @ 1m |
| Net Weight (each) | 216 lbs (98 kg) |
| Dimensions (H x W x D) | 762 mm x 1219 mm x 610 mm 30 in x 48 in x 24 in |
| Power Handling (2Hr AES Rating) | 1200 W |
| Sensitivity | 100 dB |
| Maximum SPL (1m) | 131 dB |
| Nominal Impedance | 2 x 8Ω |
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