JBL ASB7128-WH DUAL 18" SUBWOOFER (white)

JBL ASB7128-WH Dual 18" Subwoofer (White)

The ASB7128-WH is a heavyweight dual 18-inch subwoofer engineered for serious low-end reinforcement in mid-to-large venues and installations. Built on JBL's proven differential-drive platform, this rig delivers authoritative bass extension with the headroom to maintain clarity and control even at demanding SPL levels—critical for touring acts, permanent installations, and venues that demand reliable bottom-end punch night after night.

Power & Output Capability

Rated at 4000 W continuous (16000 W peak) with a long-term system rating of 2400 W (9600 W peak) over 100 hours, the ASB7128-WH generates sustained maximum output of 135 dB-SPL continuous and 141 dB peak at 1 meter. System sensitivity of 99 dB-SPL @ 1W means this sub requires minimal amplifier power to reach reference levels.

Acoustic Design & Construction

Two 2269H Ultra Long Excursion 18" woofers with neodymium magnets and dual voice coils operate in a front-loaded vented enclosure, extending response down to 20 Hz (–10 dB) and maintaining tight ±3 dB response from 25 Hz–1 kHz. The 16 mm 11-ply birch plywood cabinet with 89 mm maximum excursion capability and Vented Gap Cooling™ system ensures structural integrity and thermal stability under sustained load—built to survive the road and repeated setup cycles.

Key Features

• Dual 2269H Ultra Long Excursion 18" Differential Drive woofers with neodymium magnets
• 4000 W continuous power rating (16000 W peak); 2400 W long-term system rating (9600 W peak)
• Maximum SPL: 135 dB continuous average / 141 dB peak @ 1m; 99 dB-SPL system sensitivity @ 1W
• Frequency response (±3 dB): 25 Hz–1 kHz; Extended range (–10 dB): 20 Hz–1 kHz
• Maximum excursion: 89 mm (3.5") per woofer
• Dual voice coils and dual gaps with Vented Gap Cooling™ system for thermal management
• 16 mm exterior grade 11-ply birch plywood enclosure with 14-gauge perforated steel grille
• Switchable parallel/discrete input modes; 4-ohm parallel and 2 × 8-ohm discrete impedance options
• NL4 Neutrik Speakon and CE-compliant barrier strip input connectors
• 16 threaded M10 suspension attachment points for rigging and installation
• Dimensions: 1092 × 560 × 815 mm (43.0 × 22.0 × 32.1 inches) in vertical orientation

The ASB7128-WH combines proven dual-woofer technology, road-tested construction, and flexible input configuration to deliver consistent low-frequency reinforcement in professional sound systems.