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 professional-grade low-end control in studio monitoring and tracking environments. Built on JBL's proven differential-drive platform, this sub delivers authoritative bass extension with the headroom to maintain definition and punch even at loud reference levels, making it ideal for critical listening and mix translation across room sizes.

Power & Low-End Authority

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 you can achieve monitor-reference levels efficiently, reducing the power demands on your amplifier chain.

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 during extended tracking and monitoring sessions.

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, robust construction, and flexible input configuration to deliver consistent, controlled low-frequency response for mixing, monitoring, and studio-grade bass capture.