JBL ASB6128 - 6400W 2 x 18-inch Passive Front Loaded Installation Subwoofer in Black Finish

The JBL Professional ASB6128 is a high-power, 6400W passive subwoofer designed to provide powerful, deep bass with exceptional clarity and low distortion across a wide frequency range. Featuring two 460 mm (18-inch) JBL 2242H SVG low-frequency drivers, this subwoofer utilizes JBL's Super Vented Gap (SVG) technology, which optimizes cooling and efficiency while minimizing distortion. The drivers, equipped with 100 mm (4-inch) voice coils, ensure high power handling and long-term durability even under intense use. The ASB6128 is designed for large-scale installations and is part of JBL's AE Application Engineered Series, offering versatility for a wide variety of professional audio applications, including performing arts facilities, auditoriums, sports arenas, themed entertainment venues, and live clubs.

The ASB6128's enclosure is constructed from 16 mm (5/8-inch) exterior-grade 11-ply birch plywood, ensuring both strength and low resonance for enhanced bass performance. The cabinet is coated with JBL's rugged black DuraFlex finish, providing both a professional look and resistance to wear and tear. The subwoofer's deep, rectangular cabinet allows for extended low-frequency bandwidth while maintaining a minimal frontal profile, making it suitable for tight spaces where size and performance must be balanced. Additionally, the enclosure is equipped with 12 M10 threaded suspension points (three on the top, three on the bottom, and two on each side and rear), providing flexibility for ground stacking or secure suspension in custom arrays. Pre-engineered array bracketry is available for easier integration with other AE Series models in large-scale sound reinforcement systems.

Performance-wise, the ASB6128 excels in delivering high-output, low-distortion bass. With a frequency range from 28 Hz (-10 dB) to 1 kHz, and a frequency response from 35 Hz to 1 kHz (±3 dB), this subwoofer is capable of reproducing deep, extended low frequencies with precision and power. The ASB6128 can handle 2400W of continuous pink noise (9600W peak) for 2 hours, with a long-term power rating of 1600W (6400W peak) over 100 hours, ensuring it can deliver sustained, high-volume bass without compromising on clarity or performance. The subwoofer produces a maximum SPL of 136 dB (cont avg) and 142 dB (peak) from 30 Hz to 100 Hz, and 136 dB (cont avg) and 142 dB (peak) from 100 Hz to 500 Hz, allowing it to fill even the largest venues with clean, powerful low-end output. The system sensitivity of 102 dB at 1W (2.83V) @ 1m ensures high efficiency, maximizing performance while minimizing power consumption.

To enhance flexibility, the ASB6128 features a Parallel/Discrete switchable input mode, allowing users to choose between parallel or discrete driver configurations depending on the needs of their sound system. The FIR tuning ensures that the phase profile is properly matched to full-range models, resulting in a seamless integration within large audio systems. The subwoofer operates with a nominal impedance of 4 ohms in parallel-drive mode, and 2 x 8 ohms in discrete-drive mode, making it compatible with a wide range of amplifiers. The input connectors consist of both NL4 Neutrik Speakon and CE-compliant barrier strip terminals, which accept up to 10 AWG wire or 9 mm (0.375 in) spade lugs. The Speakon connectors are in parallel with the barrier strip, facilitating loop-through functionality for multi-unit configurations. The ASB6128 is also rated Mil-Std 810 and features an IP>3 rating per IEC529, ensuring that it is dust and water-resistant for reliable performance in harsh environments.

Features

• 2 x 18-inch JBL 2242H SVG low-frequency drivers with 100 mm (4-inch) voice coil
• Large vent area for high output with low distortion
• Frequency range: 28 Hz - 1 kHz (-10 dB), frequency response: 35 Hz - 1 kHz (±3 dB)
• Maximum SPL: 136 dB cont avg (142 dB peak) from 30 Hz to 100 Hz
• Maximum SPL: 136 dB cont avg (142 dB peak) from 100 Hz to 500 Hz
• System sensitivity: 102 dB at 1W (2.83V) @ 1m
• Nominal impedance: 4 ohms in parallel-drive mode, 2 x 8 ohms in discrete-drive mode
• Transducer power rating: 2400 W continuous (9600 W peak), 2 hours
• Long-term system power rating: 1600 W (6400 W peak), 100 hours
• Durable enclosure made from 16 mm (5/8 inch) exterior-grade 11-ply birch plywood
• 12 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>3 per IEC529 for dust and water resistance
• Dimensions: 43.1 x 22.1 x 32.2 inches
• Weight: 161 lbs
• Optional accessories: M10 x 35 mm forged shoulder eyebolts with washers, U-Bracket MTU-3

Specifications

System

• Frequency Range (-10 dB): 28 Hz - 1 kHz
• Frequency Response (±3 dB): 35 Hz - 1 kHz
• Input Modes: Drivers Parallel / Drivers Discrete
• Transducer Power Rating (AES): 2400 W (9600 W peak), 2 hrs
• Long-Term System Power Rating: 1600 W (6400 W peak), 100 hrs
• Maximum SPL (1m):
  • 30 Hz - 100 Hz: 136 dB-SPL cont avg (142 dB peak)
  • 100 Hz - 500 Hz: 136 dB-SPL cont avg (142 dB peak)
• System Sensitivity (dB-SPL, 1W @ 1m): 30 Hz - 100 Hz: 102 dB, 100 Hz - 500 Hz: 102 dB
• Nominal Impedance: 4 ohms in parallel-drive mode, 2 x 8 ohms in discrete-drive mode

Transducers

• Low Frequency Driver: 2 x JBL 2242H 460 mm (18 in) SVG drivers with 100 mm (4 in) voice coil

Physical

• Enclosure: Rectangular cabinet, 16 mm (5/8 in) exterior grade 11-ply birch plywood
• Suspension Attachment: 12 points (3 top, 3 bottom, 2 each side, 2 rear), 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≥3 per IEC529
• Dimensions: 43.1 x 22.1 x 32.2 inches
• Net Weight: 161 lbs
• Optional Accessories: M10 x 35 mm forged shoulder eyebolts with washers, U-Bracket MTU-3