JBL SRX918S - 2500W 18-inch Powered IP54-Rated Subwoofer in Black Finish

The JBL Professional SRX918S is a powerful, high-performance 18-inch active subwoofer designed to deliver deep, transparent, and linear bass response for small to large-scale applications. As part of the SRX900 Series, it is engineered to complement JBL's full-range loudspeakers, offering a complete and scalable system solution ideal for touring, rental houses, DJs, and installations. The SRX918S provides impressive output, versatile configuration options, and reliable performance, ensuring high-fidelity sound with low distortion across a wide range of environments.

At the heart of the SRX918S is the JBL 2279-1 18-inch woofer, featuring JBL's patented Differential Drive technology. This dual voice coil, dual gap design enhances heat dissipation, reduces power compression, and extends the dynamic range, making it more efficient and reliable than conventional single-coil drivers. The dual three-inch voice coils allow the subwoofer to handle high power loads while maintaining low distortion and superior performance, delivering clear and controlled low-frequency output down to 35 Hz. Whether used in omnidirectional or cardioid configurations, the SRX918S provides optimal bass coverage with a maximum peak output of 134 dB (at the 80 Hz preset).

Built-in DSP and Class-D amplification are included, offering a plug-and-play experience while providing flexibility and control over the system's performance. The amplifier delivers 1,100 watts of continuous power, with a peak power of 2,500 watts, ensuring ample headroom for high-output applications. The amplifier's passively cooled design, combined with an external aluminum heat sink and internal on-demand fan, keeps the system running efficiently even during extended use. The DSP enables users to fine-tune the system with 24 user-adjustable filters, a 2,000 ms delay, and advanced features like Array Size Compensation and FIR-based Throw Distance Correction filters. The SRX918S also includes LevelMax limiting, a sophisticated excursion-control algorithm to protect the transducers from damage while maintaining performance.

The SRX918S is equipped with dual Neutrik etherCON connectors, offering networked control via Harman HiControl. With dual 100 Mbps ports and TCP/IP protocol, users can connect multiple SRX918S subwoofers into a larger system and control them seamlessly from a computer, tablet, or other mobile device. The system's interface includes an LCD screen and LED indicators, allowing for intuitive access to the control features. These features make it easy to manage and adjust the system in real-time, whether for a small gig or a large concert tour.

Constructed from 18 mm plywood and finished with JBL's durable DuraFlex coating, the SRX918S is built to endure the rigors of touring and live performance. The enclosure is designed to offer excellent low-frequency projection while being lightweight enough for easy transportation. The subwoofer is rated IP54, making it resistant to dust and moisture, which allows it to be used in a variety of environmental conditions. The SRX918S features a rugged grille made of powder-coated 14-gauge steel with acoustically transparent black cloth backing, ensuring both protection and sound clarity.

The SRX918S can be used in different configurations depending on your needs. It offers omnidirectional coverage for general applications or can be used in a cardioid configuration when paired with the appropriate presets, optimizing the low-frequency dispersion for specific setups. Additionally, it can be ground stacked with SRX900 Series full-range loudspeakers using the optional base plate accessories, allowing for easy setup and system scalability. The SRX918S is a key component in the SRX900 Series, offering scalable, high-performance subwoofer solutions that ensure high-impact bass reproduction in any professional sound system.

Features

• JBL 2279-1 18-inch Differential Drive woofer with dual 3-inch voice coils for high-power handling and low distortion
• Frequency response from 35 Hz to 120 Hz with a maximum peak output of 134 dB
• Built-in Class-D amplifier with 1,100 watts continuous and 2,500 watts peak power, ensuring high output levels
• Integrated DSP with 24 user-adjustable filters, 2,000 ms delay, Array Size Compensation, and FIR-based Throw Distance Correction
• LevelMax limiting for excursion control and transducer protection
• Networking via dual Neutrik etherCON connectors, compatible with Harman HiControl Ethernet protocol
• Rear-panel LCD and intuitive user interface for full access to control features
• IP54-rated enclosure for dust and moisture resistance, ensuring durability in diverse environments
• Lightweight and durable 18 mm plywood enclosure with DuraFlex finish, designed for ease of transport and long-lasting performance
• Cardioid or omnidirectional configurations, with presets accessible via the rear panel LCD or software
• Rugged powder-coated 14-gauge steel grille with acoustically transparent cloth backing for protection and clear sound reproduction
• Dimensions: 22.6 x 26.9 x 26.9 inches, Net Weight: 98 lbs, Shipping Weight: 114 lbs

Specifications

Acoustical

• Frequency Range (-10 dB): 35 Hz - 90 Hz (Preset: 80 Hz)
• Frequency Response (±3 dB): 45 Hz - 80 Hz (Preset: 80 Hz)
• Coverage Pattern Options: Omnidirectional or Cardioid
• Maximum Peak Output: 134 dB SPL (Preset: 80 Hz)
• System Type: Active Subwoofer

Transducers

• Low Frequency: 1 x JBL 2279G-1, 18 in diameter, 4 ohms, dual 3.0 in diameter voice coil, ferrite Differential Drive

Audio Input

• Input Type: Balanced line level
• Connectors: 2 x Neutrik XLR (IN/OUT)
• Nominal Input Sensitivity: +6 dBu (system starts limiting with broadband noise and music)
• Maximum Input Level: 21 dBu
• Input Impedance: 100 kΩ

Amplifier

• Type: Class-D
• Number of Channels: 1
• Continuous Power: 1100 Watts
• Peak Power: 2500 Watts
• Cooling Type: Convection, external aluminum heat sink, internal on-demand fan

DSP

• Sample Rate: 48 kHz
• Bit Depth: 24 bit

User Interface

• Type: LCD screen, encoder, Back button, (4) LED Indicators (3 single, 1 bi-color)

Networking

• Type: TCP/IP
• Protocol: Harman HControl
• Speed: Dual 100 Mbps ports
• Connectors: 2 x Neutrik etherCON

AC Power

• Voltage Range:
  • Nominal: 100-240 VAC, 50/60 Hz
  • Limits: 80-260 VAC, 50/60 Hz
• Connectors: Dual (IN/OUT) Neutrik powerCON TRUE1 TOP

Current Draw

• Idle: 0.3 A
• Standby: 0.2 A
• Continuous: 4.0 A
• Maximum Instantaneous Peak: 18.1 A
• Peak Inrush: 2.9 A

Physical

• Enclosure: 18 mm plywood, Black DuraFlex finish, two integral recessed handles
• IP Rating: IP54
• Grille: Powder coated 1.8 mm (14-gauge) hex perforated steel with acoustically transparent black cloth backing
• Dimensions: 22.6 x 26.9 x 26.9 inches
• Net Weight: 98 lbs
• Shipping Weight: 114 lbs