JBL ASB7128 - 4000W 2 x 18-inch Passive Front Loaded Installation Subwoofer in Black Finish

The JBL Professional ASB7128 is a high-power, lightweight subwoofer designed for demanding applications where deep, powerful bass is essential. Featuring two 18-inch JBL 2269H Ultra Long Excursion Differential Drive woofers, the ASB7128 is engineered to deliver exceptional low-frequency performance. These drivers use neodymium magnets, dual voice coils, and dual gaps, combined with JBL's exclusive Vented Gap Cooling (VGC) technology, ensuring high excursion, long life, and superior thermal efficiency. The woofers are capable of a peak-to-peak excursion of 89 mm (3.5 inches), producing deep, distortion-free bass even at high output levels. The ASB7128 is part of JBL's AE Series, designed for both portable and fixed installation applications, including concert venues, houses of worship, auditoriums, and large-scale sound reinforcement systems.

The ASB7128's rugged design and construction make it ideal for demanding environments. The enclosure is built from 16 mm (5/8-inch) exterior-grade 11-ply birch plywood, providing a strong, durable cabinet that minimizes unwanted resonances while enhancing the subwoofer's low-frequency output. The subwoofer is coated in JBL's black DuraFlex finish, ensuring long-lasting durability and a professional appearance in any environment. The cabinet is reinforced with heavy bracing and features a large vent area to reduce distortion and ensure high output at low frequencies. The subwoofer also includes a 14-gauge perforated steel grille, internally lined with acoustically transparent foam, to protect the drivers from damage while maintaining excellent sound quality.

For added installation flexibility, the ASB7128 features 16 M10 threaded suspension points (four on the top, four on the bottom, and four on each side), allowing it to be ground-stacked or suspended in arrays with other AE Series loudspeakers. Pre-engineered array bracketry is available for easy integration into complex sound systems. The subwoofer includes both NL4 Neutrik Speakon and CE-compliant barrier strip terminals, enabling secure connections with up to 10 AWG wire or 9 mm spade lugs. The Speakon connectors are wired in parallel with the barrier strip for loop-through functionality, making multi-unit setups simple and efficient.

With a frequency range of 20 Hz to 1 kHz (-10 dB) and a frequency response of 25 Hz to 1 kHz (±3 dB), the ASB7128 delivers deep, powerful bass for a wide variety of applications. The subwoofer's 4000W continuous power handling (16000W peak) and long-term system power rating of 2400W (9600W peak) ensure it can handle the most demanding sound reinforcement tasks. The ASB7128 can produce a maximum SPL of 135 dB (continuous average) and 141 dB (peak) from 25 Hz to 200 Hz, making it ideal for large venues where high output is required. Its system sensitivity of 99 dB at 1W (2.83V) @ 1m ensures that the ASB7128 delivers ample volume even in large, acoustically challenging spaces.

The ASB7128 is designed for maximum performance in both ground-stacked and suspended configurations. It can be used alone or in combination with other AE Series products to form custom arrays, offering flexibility and scalability for a wide range of audio applications. The subwoofer's design also incorporates JBL's FIR (Finite Impulse Response) tuning, ensuring the phase profile matches seamlessly with full-range models for smooth integration and consistent sound quality across the frequency spectrum.

Features

• 2 x 18-inch JBL 2269H Ultra Long Excursion Differential Drive low-frequency drivers with 100 mm (4-inch) voice coil
• Peak-to-peak excursion of 89 mm (3.5 inches) for high excursion and minimal distortion
• Large vent area for high output with low distortion
• Frequency range: 20 Hz - 1 kHz (-10 dB), frequency response: 25 Hz - 1 kHz (±3 dB)
• Maximum SPL: 135 dB cont avg (141 dB peak) from 25 Hz to 200 Hz
• System sensitivity: 99 dB at 1W (2.83V) @ 1m
• Nominal impedance: 4 ohms (parallel-drive mode), 2 x 8 ohms (discrete-drive mode)
• Transducer power rating: 4000 W continuous (16000 W peak), 2 hours
• Long-term system power rating: 2400 W (9600 W peak), 100 hours
• Durable enclosure made from 16 mm (5/8-inch) exterior-grade 11-ply birch plywood
• 16 M10 threaded suspension points for flexible mounting
• Finish: Black DuraFlex (white finish available upon request)
• Grille: Powder-coated 14-gauge perforated steel with acoustically transparent black foam backing
• Input connectors: NL4 Neutrik Speakon and CE-compliant barrier strip terminals (accepts up to 10 AWG wire)
• Environmental ratings: Mil-Std 810; IP-x3-rated for water resistance
• Dimensions: 43 x 22 x 32.1 inches
• Weight: 158.5 lbs
• Optional accessories: M10 x 35 mm forged shoulder eyebolts with washers, U-Bracket MTU-1

Specifications

System

• Frequency Range (-10 dB): 20 Hz - 1 kHz
• Frequency Response (±3 dB): 25 Hz - 1 kHz
• Input Modes: Drivers Parallel / Drivers Discrete
• Transducer Power Rating (AES): 4000 W (16000 W peak), 2 hrs
• Long-Term System Power Rating: 2400 W (9600 W peak), 100 hrs
• Maximum SPL: 25 Hz - 200 Hz: 135 dB-SPL cont avg (141 dB peak)
• System Sensitivity (1W @ 1m): 25 Hz - 200 Hz: 99 dB-SPL, 1W (2.0V) @ 1m
• Nominal Impedance: 4 ohms in parallel-drive mode, 2 x 8 ohms in discrete-drive mode

Transducers

• Low Frequency Driver: 2 x JBL 2269H, 460 mm (18 in) dia., 100 mm (4 in) Dual Coil Dual Gap neodymium Differential Drive, VGC drivers

Physical

• Enclosure: Rectangular cabinet, 16 mm (5/8 in) exterior grade 11-ply birch plywood
• Suspension Attachment: 16 points (4 top, 4 bottom, 4 each side), M10 threaded hardware
• Finish: Black DuraFlex finish. White available upon request
• Grille: Powder coated 14 gauge perforated steel, with acoustically transparent black foam backing
• Input Connector: NL4 Neutrik Speakon and CE-compliant covered barrier strip terminals. Barrier terminals accept up to 5.2 sq mm (10 AWG) wire or max width 9 mm (.375 in) spade lugs. Speakon in parallel with barrier strip for loop-through
• Environmental Specifications: Mil-Std 810; IP-x3 per IEC529
• Dimensions: 43 x 22 x 32.1 inches
• Weight: 158.5 lbs
• Optional Accessories: M10 x 35 mm forged shoulder eyebolts with washers, U-Bracket MTU-1