JBL GSB12-GN In-Ground Landscape Subwoofer – Green

JBL GSB12 in-ground landscape subwoofer

The JBL GSB12 in-ground landscape subwoofer is engineered to deliver powerful low-frequency performance for outdoor audio systems, providing rich, deep bass reinforcement for JBL GSF full-range landscape speakers in professional outdoor environments. Designed for hospitality, corporate, retail, and public spaces, the GSB12 enhances landscape audio installations with true subwoofer performance while maintaining a discreet and visually unobtrusive presence.

The system delivers true subwoofer extension down to 30 Hz, ensuring deep, controlled bass reproduction for music and ambient sound applications. A built-in steep, multiple-slope low-pass filter provides precise low-frequency control and superior acoustic integration with full-range landscape speakers, resulting in smooth system blending and consistent sound performance across outdoor listening areas. The premium-grade 200-watt subwoofer-band transformer allows the GSB12 to operate within 70V and 100V distributed audio systems or to be configured for low-impedance direct operation, providing flexible system design options for professional installations.

Designed as an ultra-low-profile underground installation solution, the GSB12 installs below ground with only the audio port visible, preserving the natural appearance of landscaped environments. The chamber is oriented directly beneath the audio port, reducing the risk of accidental damage from landscaping activities and improving long-term reliability. Integrated grab handles simplify handling and placement during installation, while built-in anchor tabs allow the enclosure to be securely fixed to blocks or anchors for stable positioning in the ground.

Constructed from durable LDPE polyethylene with color molded throughout the enclosure, the cabinet is designed to withstand environmental exposure while maintaining appearance over time. The GSB12 is engineered for durability, acoustic performance, and seamless system integration, making it a reliable solution for landscape audio systems that require deep, powerful bass in outdoor environments while preserving clean visual aesthetics and long-term operational stability.

Features of GSB12

• 305 mm (12-inch) polypropylene low-frequency driver

• True subwoofer extension down to 30 Hz

• Built-in steep multi-slope low-pass filter

• Underground in-ground installation design

• Ultra-low-profile visible audio port

• 70V distributed line compatibility

• 100V distributed line compatibility

• Direct low-impedance operation

• Premium-grade subwoofer-band transformer

• Optimized integration with JBL GSF speakers

• Chamber positioned beneath audio port

• Protection from landscaping damage

• Integrated grab handles for installation

• Anchor tabs for secure ground mounting

• Polyethylene weather-resistant enclosure

• Omnidirectional low-frequency dispersion

• Landscape audio system integration

Specifications of GSB12