GSB8 – Coming Soon


In-Ground Landscape Subwoofer

In-Ground Landscape Subwoofer
The JBL GSB8 in-ground 8-inch landscape subwoofer augments the low-frequency performance of JBL GSF full-range landscape speakers to provide rich, full-range sound in lawn and garden areas of hospitality, corporate and retail spaces.

The GSB8 focuses on fidelity, with true subwoofer extension down to 35 Hz and a steep, multiple-slope lowpass filter for superior sound. Its premium-grade, 100-watt subwoofer-band transformer allows use in 70V/100V systems or can be connected for low-impedance direct operation.

This sleek, ultra-low-profile speaker—winner of the RedDot international design award for industrial design excellence—installs underground, with only the audio port visible. It’s designed to withstand the elements: Its chamber is oriented directly below the audio port to prevent accidental damage from landscaping, which can be a problem with side-located chambers. Grab handles allow easy installation and tabs secure the subwoofer to blocks or anchors.

Add the GSB8 to landscape areas of hotels, shopping complexes, restaurants, public spaces, theme parks or any application that demands legendary JBL sound with deep, rich, powerful bass.


  • Transducer: 200 mm (8”) polypropylene driver, 25mm (1”) voice coil on aluminum former
  • True subwoofer performance down to 35 Hz
  • Built-in steep, multiple-slope lowpass filter
  • Low-impedance ohm direct operation, plus premium-grade subwoofer-band transformer for use in 70V/100V systems
  • Forms a complete system with JBL GSF full-range landscape speakers
  • Chamber oriented directly below opening to prevent accidental damage from landscaping
  • Grab handles allow easy installation
  • Anchor points for securing cabinet to block or anchors
  • Available in hunter green or tan finishes to fit a wide variety of landscapes
  • Dimensions: 768 mm height x 311 mm diameter (30.1 x 12.2 in)
  • UL 1480A listed




Frequency Range (-10dB) 35 Hz – 130 Hz
Frequency Response (+/-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 (100 hrs)
Sensitivity 85 dB (ave. 40 Hz – 105 Hz)
Maximum SPL 115 dB peak (109 dB continuous, 2 hr) @ 1m
Nominal Coverage 360° horizontal, 160° vertical (primary listening 10° to 50° up from ground)
Nominal Impedance 6Ω (at 6Ω tap)
Transformer Taps 70V: 100 W, 50 W, 25 W
100V: 100 W, 50 W
Driver 200 mm (8-inch) driver, polypropylene injection cone, thermoplastic vulcanizate surround, 50 mm (2-inch) voice coil on glass fiber former
Terminals Bare wire with dielectric-gel-filled wire nuts (1 meter single jacked cable 7 wires with 14 AWG)
Enclosure Material LDPE Polyethylene plastic, 6 mm minimum wall thickness, color throughout
Color Hunter Green (RAL 6018) or Tan (RAL7004)
Dimensions 768 mm height x 311 mm diameter (30.1 x 12.2 in)
Net Weight 9.3 kg (20.5 lbs)
Included Accessories (7) gel-filled wire nuts

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