JBL JBL-GSB12-TN 12" In-Ground Subwoofer, Tan, 1 pc

JBL JBL-GSB12-TN 12" In-Ground Subwoofer, Tan

The JBL-GSB12-TN is a purpose-built in-ground subwoofer engineered for permanent outdoor installation in landscape and architectural audio systems. Its robust construction handles extreme environmental conditions while delivering controlled low-frequency reinforcement from a completely concealed position.

Installation & Environmental Durability

This subwoofer requires an installation hole approximately 22 inches in diameter and 26 inches deep, allowing it to integrate flush with grade for seamless landscape integration. The IP66 weather rating and MilSpec 810 compliance ensure reliable operation through humidity, salt spray, temperature fluctuations, and UV exposure—critical for permanent outdoor deployment.

Audio Performance & Power Handling

The 305 mm (12-inch) polypropylene injection cone with thermoplastic vulcanizate surround delivers 450W RMS (1800W peak) with a frequency response of 30 Hz–120 Hz and 85.5 dB sensitivity. Maximum output reaches 118 dB peak SPL (111 dB continuous at 1 meter), providing substantial bass extension for distributed outdoor systems.

Key Features

• 12-inch polypropylene cone with thermoplastic vulcanizate surround
• 50 mm (2-inch) voice coil on glass fiber former
• 450W RMS / 1800W peak power handling
• Frequency range: 30 Hz – 120 Hz
• Sensitivity: 85.5 dB (40 Hz – 105 Hz average)
• Maximum SPL: 118 dB peak / 111 dB continuous @ 1m
• 200W subwoofer-band transformer with 6-ohm direct and 70V/100V multitap modes
• IP66 weather rating with LDPE polyethylene housing and aluminum grille
• MilSpec 810 compliance (humidity, salt spray, temperature, UV resistance)
• Dimensions: 866 mm height × 402 mm diameter (34" × 16")
• Includes 40" bare-ended speaker wire, base plate, mounting hardware, and documentation

The JBL-GSB12-TN combines transformer-based system flexibility with commercial-grade weatherproofing, making it the standard choice for permanent outdoor installations requiring extended low-frequency response.