JBL ASB7128-WH DUAL 18" SUBWOOFER (white)
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- Brand new in original box
- Full JBL manufacturer's warranty
- Free shipping in the continental US
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- ASB7128-WH
. Description
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.
More Information
| Condition | New |
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At a Glance
The JBL ASB7128-WH is a professional dual 18-inch subwoofer engineered for studio monitoring and mixing in larger control rooms, offering extended bass response to 20 Hz and tight ±3 dB response for accurate mix translation. With 135 dB continuous SPL capability and switchable input modes, it works in multi-sub monitoring setups or paired with full-range speakers for balanced low-end reference. Choose this if you need a road-tested, sonically neutral sub that keeps low frequencies controlled and defined during mixing and mastering sessions.
Who This Is For
Great for
- ✓ Live Performance
- ✓ Large Venue PA
- ✓ Installation Audio
- ✓ touring
Not the best pick for
- – home listening
- – bedroom practice
- – small room use
Skill level: Professional
Frequently Asked Questions
What power amplifier do I need to drive this subwoofer?
The ASB7128-WH is rated 4000 W continuous (16000 W peak) with 99 dB-SPL system sensitivity at 1 W, meaning it reaches reference levels efficiently. Pairing it with a 3000–5000 W capable amp or powered subwoofer controller will deliver full capability; many touring rigs use dedicated sub amps in the 2400–4000 W range.
Can I use this sub in a touring PA system, or is it installation-only?
The ASB7128-WH is built for both touring and permanent installation. Its 16 mm 11-ply birch plywood cabinet, rigging suspension points (M10 threaded), and thermal stability under sustained load make it road-worthy; many mid-to-large touring rigs and festival systems use this model.
What input configuration options does it have?
The sub features switchable parallel/discrete input modes with 4-ohm parallel and 2 × 8-ohm discrete impedance options, allowing you to chain multiple units or run discrete feeds from a console. It accepts both NL4 Neutrik Speakon and CE-compliant barrier strip connections.
How low does this sub actually go, and how tight is the response?
Frequency response is ±3 dB from 25 Hz to 1 kHz, with extended range reaching 20 Hz at –10 dB. The dual 2269H woofers with maximum 89 mm excursion and differential-drive design deliver controlled, authoritative bass without flabbiness.
How does the Vented Gap Cooling system help during long shows or installs?
Vented Gap Cooling™ dissipates heat from the dual voice coils and gaps during sustained high-SPL operation, maintaining consistent performance and preventing thermal compression over hours of heavy use—critical for touring and venue reliability.
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