JBL SRX828S

The JBL SRX828S is a passive dual 18-inch subwoofer designed for professional applications ranging from live concerts and touring to permanent installations. With an extremely high maximum sound pressure level, it delivers deep, powerful, and well-defined low frequencies, providing a physical and immersive sonic impact. Its power handling allows reliable performance even at very high output levels while maintaining precise control, and its extended frequency range effectively covers the low end, making it ideal for live music, DJ sets, events, and large-scale sound systems.

The cabinet is robust and engineered to withstand intensive use, typical of rental and touring environments, with solid materials and protective finishes that enhance long-term durability. The wide enclosure design facilitates pairing with full-range speakers and allows flexible configurations, including cardioid setups, thanks to indexed feet that ensure precise and stable stacking. Ergonomically designed handles make transport and handling easier, reducing fatigue during load-in and load-out, while integrated suspension points and mounting options expand installation possibilities in both mobile and fixed applications.

Technologically, the subwoofer features high-quality JBL transducers with Differential Drive technology, combining 3-inch voice coils and optimized magnets to reduce overall weight, increase power handling, and maintain very low distortion even at high volumes. This results in an extended, controlled, and clean low-frequency response, ideal for professional applications where reliability and sound quality are critical. The system is also compatible with dedicated presets and tunings for professional amplifiers and signal processors, facilitating integration into complex setups and ensuring optimal performance.

The JBL SRX828S is designed for musicians, bands, DJs, and audio professionals seeking a powerful and versatile subwoofer capable of adapting to a wide range of environments, including clubs, theaters, corporate spaces, educational facilities, and houses of worship. When paired with other SRX Series speakers, it becomes the core of a complete professional-grade system, reinforcing the reliability and sound quality that have long defined the JBL brand.

Technical Specifications:

• System: passive dual 18-inch subwoofer
• Maximum SPL: 141 dB
• Frequency range: 30 Hz – 150 Hz (-10 dB); frequency response 47 Hz – 120 Hz (-3 dB)
• System power: 4800 W peak; 2400 W program; 1200 W continuous
• Nominal impedance: 4 Ohm
• Connectors: NL4 input; NL4 loop-thru output with +/-1 or +/-2 selectable
• Operating mode: passive
• LF drivers: 2 x JBL 2279H
• Crossover frequency: 80 Hz
• Cabinet: 18 mm plywood
• Handles: 8
• Finish: Obsidian Duraflex™
• Grille: 14-gauge powder-coated Obsidian perforated steel with acoustically transparent black cloth backing
• Dimensions (L x W x H): 1205 x 574 x 681 mm (47.42" x 22.57" x 26.79")
• Weight: 62.1 kg (137 lbs)