JBL JBL-GSB8-TN 8" In-Ground Subwoofer, Tan, 1 pc
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- Brand new in original box
- Full JBL manufacturer's warranty
- Free shipping in the continental US
In stock
- SKU
- JBL-GSB8-TN
Description
JBL JBL-GSB8-TN 8" In-Ground Subwoofer, Tan
The JBL GSB8-TN is a professional-grade in-ground subwoofer engineered for landscape and architectural audio installations where seamless integration matters. Its compact footprint and weatherproof composite construction disappear into outdoor environments while delivering visceral low-end extension that anchors full-range systems. This is purpose-built hardware for installers and system designers who need legitimate subwoofer performance buried in the ground.
Audio Performance & Coverage
This subwoofer reaches down to 35 Hz with a steep, multiple-slope lowpass filter, delivering true subwoofer extension rather than consumer-grade midrange boosting. With 114 dB peak SPL (108 dB continuous) and 84 dB sensitivity across its operating band, the unit produces authoritative output from a compact 8-inch driver while maintaining headroom for dynamic programming. The 360° horizontal and 160° vertical coverage pattern ensures consistent response across outdoor listening areas.
Installation & Build Quality
The IP66-rated LDPE polyethylene enclosure with 6 mm walls and weatherproof port cap withstands direct ground burial and prolonged moisture exposure without degradation. Installation requires an approximately 18.3" diameter by 24.8" deep hole, and the unit ships with a 40" input harness for flexible connectivity to distant amplifier locations. Flexible power options—250W RMS (1000W peak) with 6-ohm, 70V, or 100V operation—accommodate both low-impedance direct runs and distributed voltage systems common in landscape audio.
Key Features
- 8-inch polypropylene injection cone driver with thermoplastic vulcanizate surround
- 50 mm voice coil on glass fiber former
- Frequency extension down to 35 Hz with steep lowpass filter
- 84 dB sensitivity (average 43 Hz – 110 Hz)
- 114 dB peak SPL (108 dB continuous @ 1m)
- 250W RMS / 1000W peak power handling
- 6-ohm, 70V, and 100V operation with 100-watt transformer for distributed systems
- 360° horizontal and 160° vertical coverage pattern
- IP66-rated composite bandpass enclosure with 6 mm polyethylene walls
- Height 768 mm (30.1"), diameter 311 mm (12.2")
- Neutral beige-grey finish (RAL 7006) for minimal visual impact
- 40" input harness included
The GSB8-TN combines legitimate subwoofer performance with outdoor-rated construction and flexible system integration, making it a solid choice for professional landscape and architectural installations.
More Information
| Condition | New |
|---|
Reviews
At a Glance
The JBL GSB8-TN is a professional in-ground subwoofer built to survive outdoor burial while delivering true low-end extension down to 35 Hz with 114 dB peak SPL. Sound reinforcement crews and installation pros rely on it for landscape audio systems, resort venues, and distributed outdoor live-sound setups where legitimate subwoofer response matters and visual stealth is non-negotiable. Its weatherproof composite enclosure, flexible voltage options (6-ohm, 70V, 100V), and 360° coverage pattern make it the dependable choice for permanent outdoor installations that demand pro-grade performance.
Who This Is For
Great for
- ✓ landscape audio installations
- ✓ architectural audio systems
- ✓ outdoor live sound
- ✓ distributed venue audio
Not the best pick for
- – indoor studio recording
- – portable live touring
- – compact home audio
Skill level: Professional
Frequently Asked Questions
What does in-ground installation mean, and what does burial require?
In-ground means the subwoofer is designed to be buried flush or partially flush in outdoor soil or landscape. Installation requires an approximately 18.3-inch diameter by 24.8-inch deep hole. The IP66-rated polyethylene enclosure and weatherproof port cap protect the driver and electronics from direct moisture exposure during ground burial.
Can I use this indoors, or is it only for outdoor landscape audio?
The GSB8-TN is purpose-built for landscape and architectural audio installations where seamless integration into outdoor environments is the goal. It is not designed for indoor studio recording, portable touring, or compact home audio; its coverage pattern and weatherproofing are optimized for outdoor distributed systems.
What are the power and voltage options?
The unit operates at 250W RMS (1000W peak) and supports 6-ohm, 70V, or 100V modes. A 100-watt transformer for 70V/100V distributed systems is included, allowing flexible integration with both direct low-impedance runs and voltage-distributed outdoor audio networks.
How deep is the low-end extension, and will it work seamlessly with full-range speakers?
The GSB8-TN reaches down to 35 Hz with a steep, multiple-slope lowpass filter, delivering legitimate subwoofer extension rather than midrange boosting. Its 84 dB sensitivity and neutral response curve are designed to integrate seamlessly with outdoor full-range systems in landscape and architectural installations.
What is the weatherproof rating and how long will it last buried in the ground?
The unit carries an IP66 rating with a 6 mm LDPE polyethylene enclosure and weatherproof port cap, engineered to withstand direct ground burial and prolonged moisture exposure without degradation. It is built for permanent outdoor installation in harsh environments.
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