Description

The JBL 4645C Single 18 inch Subwoofer System, 800W @ 8 Ohms is a high-quality subwoofer system, featuring a technologically advanced 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. The 2242H 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.

JBL 4645C Single 18 inch Subwoofer System, 800W @ 8 Ohms Specifications

– Low Frequency Transducer: 1 x 2242H, 460 mm (18 in)
– Rated Impedance: 8 Ω
– Minimum Impedance: 7.2 Ω
– Input Power Handling (AES 100-Hour Rating): 650 W (72 Vrms), pink/IEC
– Input Power Handling (AES 2-Hour Rating): 800 W (80 Vrms), pink/IEC
– Sensitivity: 40 Hz – 100 Hz, 97 dB, 1 W @ 1m; reference 2.83 V
– Max Continuous SPL @ 1 meter:
  – Single Module: 126 dB
  – Two Modules: 132 dB
  – Four Modules: 137 dB
  – Eight Modules: 141 dB
– Max Peak SPL @ 1 meter:
  – Single Module: 132 dB
  – Two Modules: 138 dB
  – Four Modules: 143 dB
  – Eight Modules: 147 dB
– Frequency Response, Lower Frequency Limits (no EQ):
  – -10 dB: 22 Hz
  – -3 dB: 35 Hz
– Frequency Response, Lower Frequency Limits (with EQ):
  – -10 dB: 20 Hz
  – -3 dB: 22 Hz
– Recommended Crossover Frequencies:
  – High-pass: 20 Hz, 12 dB/octave or greater
  – Low-pass: 80 Hz to 150 Hz, 12 dB/octave or greater
– System Polarity: EIA Standard, Positive voltage to RED terminal produces forward cone motion
– Input Connectors: Color-coded push terminals
– Net Weight: 63 kg (138 lb)