JBL Speaker ASB7128 and ASB7128-WH Dual 18″ Subwoofers

The JBL Speaker ASB7128 and ASB7128-WH are powerful dual 18″ subwoofers designed for high-performance audio systems. They deliver deep, punchy bass that’s perfect for concerts, theaters, and large venues. With robust build quality and JBL’s advanced driver technology, they ensure reliable sound performance even at high volumes. The ASB7128 comes in black, while the ASB7128-WH offers a white finish for visually sensitive installations. Both models are ideal for professional setups that demand clean, impactful low-end sound.

Full Specifications

Sound Performance

• Frequency Range (-10 dB): 27 Hz – 1 kHz

• Frequency Response (±3 dB): 35 Hz – 500 Hz

• Power Handling: 2400 watts continuous, 9600 watts peak

• Maximum SPL: Up to 137 dB (very powerful bass output)

• Sensitivity: 101 dB

• Nominal Impedance: 4 ohms

Speaker Drivers

• Woofer Configuration: Two 18-inch JBL 2269H Differential Drive® drivers

• Voice Coil: 4.5-inch dual voice coils (for better power handling and heat management)

Enclosure Design

• Type: Front-loaded, vented subwoofer box

• Material: Durable 18 mm birch plywood

• Finish:

  • ASB7128: Black DuraFlex™ paint

  • ASB7128-WH: White finish (ideal for architectural spaces)

• Grille: Powder-coated steel with acoustically transparent foam (color-matched)

Connectivity

• Input Connectors:

  • 2 x Neutrik Speakon NL4

  • 1 x Barrier strip terminal block

• Wiring Options: Parallel or discrete wiring for flexibility in system setup

Mounting & Rigging

• Suspension Points: 14 M10 threaded points for safe hanging or flying

Dimensions & Weight

• Height: 558 mm (22 in)

• Width: 1206 mm (47.5 in)

• Depth: 851 mm (33.5 in)

• Weight: 88.6 kg (195 lbs)

Ideal For

Perfect for large-scale sound systems in concerts, theaters, clubs, and worship venues requiring deep, controlled bass with professional performance.