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
| 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 | |
| Output Capability | - | |
| Axial Sensitivity | 50 Hz to 500 Hz; 99 dB, 1W @ 1m 40 Hz to 100 Hz; 97 dB, 1W @ 1m |
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| 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 | 63 kg (138 lbs.) | |
| Dimensions H x W x D | 1010 mm x 674 mm x 450 mm 39¾ in x 26½ in x 17¾ in |
