4645C vs Bag End Infra-18
The Infra-18's power @ 8ω is 400W against the 4645C's 800W and its sensitivity 96 dB against 99 dB. Both share impedance (8Ω) and woofer (18").
AI-generated product photo — not official manufacturer imagery.
LoudspeakersSubwoofers
Estimated price (community-sourced)
$1,400 - $1,895
Around — community and catalog average, updates slowly
About the 4645C
The JBL 4645C is a professional-grade subwoofer featuring a 460 mm (18 in) low frequency transducer mounted in a direct radiator, bass-reflex enclosure. It delivers smooth response to the lowest audible frequencies, making it ideal for augmenting analog or digital soundtracks in theaters and general sound reinforcement. It is THX certified and approved by Lucasfilm for THX installations. The system uses the 2242H SVG Super Vented Gap Cooled driver, which offers high sensitivity, minimal power compression, high maximum SPL capability, and extremely low harmonic distortion. The enclosure is constructed from particle board and finished in black.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 99 dB SPL @ 1W/1m
- Impedance
- 8Ω
- Frequency Response
- 22 Hz - 22 kHz
- Power Handling
- 3.2kW
- Min. Amplifier Power
- 80W
- Max. Amplifier Power
- 800W
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 800W @ 8Ω
Speaker Design
Driver configuration and enclosure design
- Driver Size
- 18"
- Driver Count
- 1
- Enclosure Type
- ported
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 674 × 1010 × 450 mm (W × H × D)
- Weight
- 63 kg (139 lbs)
Key Specifications
Sensitivity: 99 dB
Impedance: 8Ω
Power: 800W
Frequency: 22-22000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions