JBL GSB8-GN In-Ground Landscape Subwoofer – Green

JBL GSB8 in-ground landscape subwoofer

The JBL GSB8 in-ground landscape subwoofer is engineered to deliver high-quality low-frequency performance for outdoor audio systems, enhancing JBL GSF full-range landscape speakers with deep, rich bass in professional landscape environments. Designed for hospitality, corporate, retail, and public spaces, the GSB8 provides powerful subwoofer reinforcement while maintaining a discreet and visually minimal installation footprint.

The system delivers true subwoofer extension down to 35 Hz, providing controlled and accurate low-frequency reproduction for music and ambient sound applications. A built-in steep, multiple-slope low-pass filter ensures precise frequency management and smooth acoustic integration with full-range landscape speakers, resulting in balanced system performance and consistent sound coverage across outdoor listening areas.

The premium-grade 100-watt subwoofer-band transformer allows the GSB8 to operate in both 70V and 100V distributed audio systems or be configured for low-impedance direct operation. This flexibility enables seamless integration into a wide range of commercial and institutional sound systems while maintaining stable performance and efficient power distribution.

Designed with an ultra-low-profile underground installation format, the GSB8 installs below ground level with only the audio port visible, preserving the natural appearance of landscaped environments. The chamber is positioned directly beneath the audio port to reduce the risk of accidental damage from landscaping equipment, improving long-term reliability. Integrated grab handles simplify installation and handling, while anchor tabs allow the enclosure to be securely fixed to blocks or anchors for stable and permanent placement.

Constructed from durable LDPE polyethylene with color molded throughout the enclosure, the cabinet is built to withstand outdoor environmental exposure while maintaining its appearance over time. The JBL GSB8 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 a compact in-ground design.

Features of GSB8

• 209 mm (8-inch) polypropylene subwoofer driver

• True subwoofer extension down to 35 Hz

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

• Ultra-low-profile in-ground installation

• Underground chamber protection design

• 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 points for secure mounting

• Polyethylene weather-resistant enclosure

• Omnidirectional low-frequency dispersion

• Landscape audio system integration

Specifications of GSB8