JBL SRX828S Dual 18-inch Passive Subwoofer

The JBL SRX828S Dual 18-Inch Passive Subwoofer is a professional-grade loudspeaker designed for high-impact low-frequency reinforcement in concerts, touring, DJ setups, and permanent installations. Engineered as part of the SRX800 Series, the JBL SRX828S delivers deep, powerful bass with a maximum SPL of 135 dB, ensuring robust performance for both live sound and installation applications.

Featuring two 18-inch 2279H Differential Drive® woofers, the SRX828S provides extended low-frequency response, precise control, and reduced distortion even at high output levels. Tunings and presets are available for Crown ITech HD amplifiers, making it compatible with professional touring systems and rental setups.

The SRX828S is designed with flexibility and durability in mind. It includes eight ergonomic handles, M10 suspension points, indexed feet for standard and cardioid stacking, and optional casters for easy transport. The 18 mm Duraflex™ coated plywood enclosure is rugged enough to withstand the demands of touring while protecting the dual woofers. A powder-coated steel grille with acoustically transparent black cloth backing shields the drivers from damage while maintaining acoustic transparency.

Features of SRX828S

• Dual 18-inch two-way passive subwoofer system

• Maximum SPL: 135 dB peak / 129 dB continuous

• Frequency response: 47 Hz – 120 Hz

• Differential Drive® 18-inch low-frequency drivers (2x 2279H)

• Crossover frequency: 80 Hz

• 4800W peak / 2400W program / 1200W continuous power handling

• Nominal impedance: 4 Ω

• Inputs: NL4 Input and NL4 Loop-thru (+/-1 or +/-2 selectable)

• Operational mode: Passive

• 18 mm Duraflex™ coated plywood enclosure

• Eight ergonomic handles for easy transport

• Indexed stacking feet and M10 suspension points

• Compatible with optional WK-4S caster kit

• Obsidian Duraflex™ finish with powder-coated steel grille and acoustically transparent cloth backing

• Versatile for main subwoofer, touring, or installed sound systems

Specifications of SRX828S