JBL GSB8-GN - 500W 8-inch Passive IP66-Rated 70V/100V In-Ground Landscape Subwoofer with 360 x 160-Degree Coverage in Green Finish

The JBL Professional GSB8-GN is a high-performance in-ground 8-inch landscape subwoofer designed to enhance the low-frequency output of JBL GSF full-range landscape speakers. Delivering true subwoofer performance with extension down to 35 Hz, this subwoofer provides rich, powerful bass to complement outdoor audio systems in hospitality, corporate, and retail spaces. Its built-in steep, multiple-slope lowpass filter ensures superior sound fidelity, while a premium-grade 100W subwoofer-band transformer enables seamless integration with 70V/100V distributed systems or low-impedance direct operation. The GSB8-GN's ultra-low-profile design installs discreetly underground, with only the audio port visible above ground, ensuring a seamless visual integration into landscaped environments.

Designed to withstand harsh outdoor conditions, the GSB8-GN features an IP66-rated LDPE polyethylene enclosure with a 6 mm wall thickness, providing robust protection against dust, water, UV exposure, and extreme weather. Its chamber is positioned directly below the audio port, safeguarding against damage from landscaping activities. The subwoofer includes grab handles for effortless installation and anchor points for secure mounting. Finished in a hunter green (Pine Green RAL 6028) color, it blends naturally with its surroundings, making it ideal for gardens, theme parks, shopping centers, and other outdoor applications demanding high-quality sound.

Features

• 8-inch in-ground subwoofer delivering 500W continuous program power
• Frequency range of 35 Hz - 130 Hz (-10 dB) and 43 Hz - 120 Hz (+3 dB) for deep, accurate bass
• Built-in steep, multiple-slope lowpass filter for enhanced sound clarity
• Premium-grade transformer supports 70V/100V systems and 6-ohm low-impedance operation
• Rated maximum SPL of 114 dB peak for impactful low-frequency output
• 360° horizontal and 160° vertical coverage for even sound distribution
• Custom-engineered 209 mm polypropylene cone driver with TPV surround
• IP66-rated enclosure for protection against dust, water, and harsh environmental conditions
• Durable LDPE polyethylene enclosure with 6 mm wall thickness and powder-coated stainless steel grille
• Chamber positioned below the audio port to prevent damage during landscaping
• Grab handles and anchor points ensure easy installation and secure mounting
• Connection via bare wire with dielectric-gel-filled wire nuts for reliable performance
• Compact dimensions of 30.2 x 12.2 inches (height x diameter) and weight of 20.5 lbs
• Hunter green (Pine Green RAL 6028) finish for discreet integration into outdoor landscapes
• Shipping weight of 20.5 lbs per carton with included seven gel-filled wire nuts

Specifications

System

• Frequency Range (-10 dB): 35 Hz - 130 Hz
• Frequency Range (+3 dB): 43 Hz - 120 Hz
• Power Rating: 500 W Continuous Program (2 hrs), 250 W (1000 W Peak) Continuous Pink Noise (2 hrs), 150 W (600 W Peak) Continuous Pink Noise (rating)
• Maximum Input Voltage: 35 V (based on 2 hr Continuous Pink Noise rating)
• Sensitivity: 84 dB (43 Hz - 110 Hz)
• Nominal Coverage Angle: 360° horizontal, 160° vertical (primary listening 10° to 50° up from ground)
• Rated Maximum SPL: 114 dB peak (108 dB continuous, 2 hr) @ 1m
• Impedance: 6Ω tap (nominal), Minimum Impedance: 5.2Ω at 51 Hz
• Transformer Taps: 70V: 100 W, 50 W, 25 W; 100V: 100 W, 50 W
• Insertion Loss: <0.5 dB at any tap setting
• Crossover Type: 2nd order
• Recommended Protective High-Pass: 35 Hz for 6Ω operation and for all tap settings, 24 dB/oct

Transducer

• Driver: 209 mm (8-inch) driver, polypropylene injection cone, TPV thermoplastic vulcanizate surround, 38 mm (1.5-inch) voice coil on Kapton former

Physical

• Enclosure Material: LDPE Polyethylene plastic, 6 mm minimum wall thickness, color throughout
• Grille: Powder coated stainless steel
• Environmental: IP-66 rating per IEC529 (dust protected and protected against strong jets of water), Exceeds MilSpec 810 for humidity, salt spray, temperature, and 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 jacket cable 7 wires with 14 AWG)
• Colors: Pine Green RAL 6028, or Beige Grey RAL 7006
• Dimensions: 30.2 x 12.2 inches (height x diameter)
• Shipping Weight: 20.5 lbs per carton (1 speaker per carton)
• Included Accessories: (7) gel-filled wire nuts