JBL JBL-GSB8-TN 8" In-Ground Subwoofer, Tan, 1 pc

JBL JBL-GSB8-TN 8" In-Ground Subwoofer, Tan

The JBL GSB8-TN is a professional-grade in-ground subwoofer engineered for studio monitoring applications where discrete, weatherproof bass extension is required. Its compact footprint and weatherproof composite construction integrate seamlessly into control rooms and outdoor listening environments while delivering visceral low-end extension that anchors full-range monitoring systems. This is purpose-built hardware for recording engineers and producers who need legitimate subwoofer performance in challenging acoustic spaces.

Audio Performance & Coverage

This subwoofer reaches down to 35 Hz with a steep, multiple-slope lowpass filter, delivering true subwoofer extension for accurate mix translation 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 and mix detail. The 360° horizontal and 160° vertical coverage pattern ensures consistent bass response across the listening area, critical for evaluating low-end balance during tracking and mixing sessions.

Integration & Build Quality

The IP66-rated LDPE polyethylene enclosure with 6 mm walls and weatherproof port cap withstands moisture exposure and ground burial without degradation, making it suitable for both interior installs and flexible studio repositioning. Installation requires an approximately 18.3" diameter by 24.8" deep hole, and the unit ships with a 40" input harness for running signal from distant amplifier or interface locations in your studio setup. Flexible power options—250W RMS (1000W peak) with 6-ohm, 70V, or 100V operation—accommodate both direct low-impedance monitoring feeds and distributed voltage systems, giving you routing flexibility across different studio configurations.

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 durable construction and flexible system integration, making it a solid choice for professional studio monitoring and mix verification across recording spaces.