JBL 4645 (woofer 2245h) - 18" Professional Subwoofer

(SUB1003)

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The JBL 4645 is a powerful 18” subwoofer system designed for professional cinema and sound reinforcement applications, known for its deep bass and rugged build.

🔊 Key Specifications

• Driver: JBL 2245H 18” low-frequency transducer (in the original 4645);

• Cabinet: Model 4518 bass-reflex enclosure, tuned to 30 Hz with an 8 cubic foot internal volume 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

• Power Handling: • 4645B: Rated at 800 watts continuous RMS, thanks to advanced cooling and motor structure 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

• Frequency Response:• Extends smoothly to the lowest audible frequencies, ideal for cinematic LFE (Low Frequency Effects) channels 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

• Design Features:• SVG (Super Vented Gap) and SFG (Symmetrical Field Geometry) technologies for reduced distortion and improved thermal handling 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

• Construction: 19 mm particle board with 25 mm baffle and back panel, extensively braced for rigidity 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

🏛️ Applications

• THX-certified for theater use 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

• Commonly paired with vintage JBL studio monitors like the 4343 for full-range systems 9F742443-6C92-4C44-BF58-8F5A7C53B6F1.

• Suitable for both residential and commercial setups where deep, accurate bass is essential.

🛠️ Historical Context

• The JBL 4645 emerged in the 1980s as part of JBL's Professional Series, targeting high-end cinema and studio environments.

• Its modular design—separating cabinet and driver model numbers—allowed for flexible upgrades and replacements.