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

The JBL Professional GSB12-TN is a high-performance in-ground 12-inch landscape subwoofer designed to deliver powerful, low-frequency sound for outdoor spaces in hospitality, corporate, and retail environments. Seamlessly augmenting the performance of JBL GSF full-range landscape speakers, the GSB12-TN ensures rich, full-range audio with subwoofer extension down to 30 Hz, providing a truly immersive sound experience. Its premium-grade 200W subwoofer-band transformer enables versatile operation in 70V/100V distributed systems or 8-ohm low-impedance setups, offering unparalleled flexibility. Engineered for unobtrusive integration, the subwoofer's ultra-low-profile design features an underground installation with only the audio port visible above ground, blending effortlessly into any landscape setting.

The GSB12-TN is built to endure the harshest outdoor conditions, boasting an IP66-rated enclosure that protects against dust and powerful water jets, as well as compliance with MilSpec 810 standards for humidity, salt spray, temperature, and UV resistance. Its robust LDPE polyethylene housing is complemented by an aluminum grille, ensuring long-term durability. The innovative design positions the acoustic chamber directly beneath the audio port to safeguard against accidental damage from landscaping activities. The subwoofer also includes grab handles and anchor points for effortless installation and secure mounting. Finished in tan to match a variety of landscape aesthetics, the GSB12-TN delivers the legendary JBL sound quality with deep, impactful bass.

Features

• 12-inch in-ground subwoofer delivering 900W continuous program power
• Frequency range down to 30 Hz for true subwoofer performance
• Steep, multiple-slope low-pass filter for enhanced sound fidelity
• Premium-grade transformer supports 70V/100V systems and 8-ohm low-impedance operation
• Rated maximum SPL of 118 dB peak for dynamic low-frequency output
• 360-degree horizontal and 160-degree vertical coverage for even sound distribution
• Custom-engineered 305 mm polypropylene cone driver with thermoplastic vulcanizate surround
• IP66-rated enclosure for protection against dust, water, and extreme environmental conditions
• Durable LDPE polyethylene enclosure with 6 mm wall thickness and integrated aluminum grille
• Chamber positioned directly below the audio port to prevent landscaping damage
• Grab handles and anchor points ensure easy installation and secure mounting
• Connection via bare wire and dielectric-gel-filled wire nuts for reliable performance
• Compact dimensions of 33.2 x 15.8 inches and weight of 35.7 lbs
• Shipping weight of 43.0 lbs per carton with included seven wire nuts
• Available in a tan finish (Beige Grey RAL 7006) for versatile landscape integration

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