JBL GSB12-GN - 900W 12-inch Passive IP66-Rated 70V/100V In-Ground Landscape Subwoofer with 360 x 160-Degree Coverage in Green Finish

The JBL Professional GSB12-GN is a powerful 12-inch in-ground landscape subwoofer engineered to deliver deep, impactful bass for outdoor sound systems in hospitality, corporate, retail, and recreational spaces. Designed for seamless integration with JBL GSF full-range landscape speakers, the GSB12 enhances low-frequency performance with true subwoofer extension down to 30 Hz, providing a rich and immersive audio experience in open-air environments. Powered by a robust 900W continuous program rating, this subwoofer features a premium-grade subwoofer-band transformer, allowing it to operate in 70V/100V distributed systems or in low-impedance direct mode for flexible configuration options. Its innovative low-profile design ensures unobtrusive installation, with only the audio port visible above ground, blending naturally into any landscape.

The GSB12 is built to withstand the elements, boasting an IP66 rating for protection against dust and powerful water jets, along with compliance to MilSpec 810 standards for humidity, salt spray, UV exposure, and temperature extremes. Its rugged LDPE polyethylene enclosure is complemented by an aluminum grille, ensuring durability in even the harshest outdoor conditions. The subwoofer's unique design includes a chamber positioned directly beneath the audio port to prevent accidental damage from landscaping tools. Additionally, grab handles and anchor points make installation simple and secure, while the dielectric-gel-filled wire nuts provide reliable connections for long-term performance. Available in a hunter green finish, the GSB12 seamlessly integrates into a variety of outdoor settings, delivering legendary JBL sound with unparalleled bass response.

Features

• 12-inch in-ground landscape subwoofer with 900W continuous program power
• True subwoofer performance with frequency response down to 30 Hz
• Premium-grade transformer for 70V/100V operation or 8-ohm low-impedance mode
• Built-in steep, multiple-slope low-pass filter for superior sound quality
• Rated maximum SPL of 118 dB peak for impactful bass output
• 360-degree horizontal and 160-degree vertical coverage for uniform sound distribution
• Custom-engineered 305 mm polypropylene cone driver with 50 mm voice coil on Kapton former
• IP66-rated enclosure with 6 mm LDPE polyethylene walls for durability
• Aluminum grille provides additional protection and aesthetic integration
• Designed to withstand extreme environmental conditions including UV, humidity, and salt spray
• Chamber positioned below audio port to prevent accidental damage from landscaping
• Easy installation with grab handles and anchor points for secure mounting
• Connection via bare wire and dielectric-gel-filled wire nuts for reliable outdoor performance
• Compact dimensions of 33.2 x 15.8 inches and weight of 35.7 lbs
• Available in hunter green (RAL 6028) to blend into natural surroundings
• Optional beige grey (RAL 7006) finish for additional customization
• Includes seven wire nuts for quick and secure installation

Specifications

System

• Frequency Range (-10 dB): 30 Hz - 120 Hz
• Frequency Response (±3 dB): 39 Hz - 107 Hz
• Power Rating: 900 W Continuous Program (2 hrs)
• Maximum Input Voltage: 45 V (based on 2 hr Continuous Pink Noise rating)
• Sensitivity: 85.5 dB (ave. 40 Hz - 105 Hz)
• Nominal Coverage Angle: 360° horizontal, 160° vertical (primary listening 10° to 50° up from ground)
• Rated Maximum SPL: 118 dB peak (112 dB continuous, 2 hr) @ 1m
• Nominal Impedance: 8Ω (at 62 tap)
• Minimum Impedance: 4.8Ω at 43Hz
• Transformer Taps: 70V: 200W, 100W, 50W, 100V: 200W, 100W
• Insertion Loss: <0.5 dB at any tap setting
• Thru Setting: 6Ω nominal
• Crossover Type: 2nd order
• Recommended Protective High-Pass: 27 Hz for 6Ω operation and for all tap settings, 24 dB/oct

Transducer

• Driver: 305 mm (12-inch) driver, polypropylene injection cone, thermoplastic vulcanizate surround, 50 mm (2-inch voice coil on Kapton former)

Physical

• Enclosure Material: LDPE Polyethylene plastic, 6 mm minimum wall thickness, color throughout
• Grille: Aluminum
• Environmental: IP-66 rating per IEC529 (dust protected and protected against strong jets of water). Exceeds MilSpec 810 for humidity, salt spray, temperature, & UV. Passes Mil-Std-202F for salt spray.
• Agency Ratings: Transformer UL Recognized per UL1876, ROHS compliant
• Terminals: Bare wire with dielectric-gel-filled wire nuts (1 meter single jacked cable 7 wires with 14 AWG)
• Dimensions (H x D): 33.2 x 15.8 inches
• Net Weight: 35.7 lbs
• Shipping Weight: 43.0 lbs per carton (1 speaker per carton)
• Included Accessories: (7) wire nuts
• Optional Accessories: Pine Green RAL 6028, or Beige Grey RAL 7006