JBL GSB12-TN In-Ground Landscape Subwoofer – Tan

JBL GSB12 in-ground landscape subwoofer

The JBL GSB12 in-ground landscape subwoofer is engineered to deliver deep, powerful low-frequency performance for professional outdoor audio installations, complementing JBL GSF full-range landscape speakers in large-scale environments such as hotels, parks, retail spaces, event venues, and public areas. Designed with a strong focus on fidelity and acoustic precision, the GSB12 provides true subwoofer performance while maintaining a discreet, low-visibility installation profile.

At the core of the system is a powerful 12-inch (305 mm) polypropylene subwoofer driver that delivers true low-frequency extension down to 30 Hz, producing rich, controlled bass output for outdoor sound reinforcement. The built-in multi-slope low-pass filter ensures smooth and accurate low-frequency reproduction, allowing seamless acoustic integration with full-range landscape speakers. This design supports consistent sound performance across wide outdoor coverage areas without distortion or uneven bass response.

The GSB12 supports high-power operation with continuous program handling up to 900 W and peak handling up to 1800 W, making it suitable for demanding professional installations. A premium-grade 200 W subwoofer-band transformer allows flexible system configuration, supporting both 70V and 100V distributed line systems, as well as direct low-impedance operation via a 6-ohm bypass option. This versatility enables integration into a wide range of commercial and institutional audio infrastructures.

The ultra-low-profile enclosure installs underground, with only the audio port visible, preserving the visual aesthetics of landscaped environments. The chamber is positioned directly beneath the audio port to reduce the risk of damage from landscaping equipment. Integrated grab handles simplify installation, while anchor points allow secure mounting to blocks or anchors for long-term stability. Constructed from durable polyethylene with weather-resistant design and IP66 environmental protection, the JBL GSB12 is built for long-term outdoor performance, reliability, and acoustic consistency.

Features of GSB12

• 12-inch polypropylene subwoofer driver

• True subwoofer extension down to 30 Hz

• Ultra-low-profile in-ground installation

• Built-in multi-slope low-pass filter

• 900 W continuous program power handling

• 1800 W peak power handling

• 70V distributed line compatibility

• 100V distributed line compatibility

• Direct 6-ohm low-impedance operation

• Premium-grade subwoofer-band transformer

• Underground chamber protection design

• Grab handles for easy installation

• Anchor points for secure mounting

• IP66 environmental protection rating

• Weather-resistant enclosure construction

• Stainless steel grille integration

• Landscape audio system optimization

Specifications of GSB12