Medium Power Dual 18-inch Subwoofer
JBL ASB4128 Dual 18 inch Subwoofer is a high-performance bass speaker designed for professional installed sound systems, delivering powerful low-frequency output with dual 18-inch drivers. The JBL ASB4128 Dual 18 inch Subwoofer features a front-loaded vented enclosure, high SPL performance, and flexible parallel or discrete driver operation, making it ideal for auditoriums, houses of worship, theatres, live music venues, sports facilities, and entertainment installations.
The ASB4128 is equipped with two JBL 2042H 460 mm (18-inch) low-frequency drivers featuring 75 mm (3-inch) voice coils for deep, controlled bass reproduction. Its front-loaded vented cabinet extends low-frequency bandwidth while maintaining a compact rectangular profile suitable for permanent installations. Built from durable 16 mm exterior-grade 11-ply Finnish birch plywood, the enclosure delivers long-lasting reliability in demanding environments.
Designed for installation flexibility, the cabinet includes twelve M10 threaded suspension points for secure mounting. The system supports both drivers connected in parallel for a 4-ohm load or operated independently as two 8-ohm sections, allowing compatibility with various amplifier configurations.
The JBL ASB4128 Dual 18 inch Subwoofer offers a frequency range of 30 Hz to 1 kHz with a frequency response of 40 Hz to 1 kHz. It handles 1000 W AES continuous power (4000 W peak) and delivers a system power rating of 600 W AES (2400 W peak). Maximum sound pressure reaches 133 dB continuous and 139 dB peak, providing impactful bass reinforcement for large venues.
Whether used in performing arts centers, conference halls, theatres, houses of worship, live clubs, dance venues, sports arenas, or themed entertainment attractions, the JBL ASB4128 Dual 18 inch Subwoofer delivers reliable, high-output low-frequency performance with professional installation versatility.