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 international design awards 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: 209 mm (8”) polypropylene driver, 38mm (1.5”) voice coil on Kapton 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)


  Version Language Size Uploaded
Spec Sheets
file type icon GSB8 Spec Sheet
en updated: 12月27日
  en  533.3 KB 12月27日
Install Guides
file type icon GSB8 & GSB12 Installation Guide
en version A, updated: 2月01日
en  611.1 KB 2月01日
Speaker Tunings
file type icon Commercial, CBT, and AWC Tunings 220616
updated: 8月29日
    557.0 KB 8月29日

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Parts & Service


频率范围 (-10dB) 35 Hz – 130 Hz
频率响应(±3 dB) 43 Hz – 120 Hz
额定功率 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)


84 dB (ave. 43 Hz – 110 Hz)
Maximum SPL 114 dB peak (108 dB continuous, 2 hr) @ 1m
覆盖范围 360° horizontal, 160° vertical (primary listening 10° to 50° up from ground)
标称阻抗 6Ω (at 6Ω tap)
变压器抽头 70V: 100 W, 50 W, 25 W
100V: 100 W, 50 W
驱动单元 209 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)
音箱材料 LDPE Polyethylene plastic, 6 mm minimum wall thickness, color throughout
颜色 Hunter Green (RAL 6018) or Tan (RAL7004)


768 mm height x 311 mm diameter (30.1 x 12.2 in)
净重量 9.3 kg (20.5 lbs)


(7) gel-filled wire nuts



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In-Ground Landscape Subwoofer