JBL Professional
JBL SRX928S Dual 18-inch Powered Subwoofer
Best high-output subwoofer for professional live event production teams.
The JBL SRX928S is a dual 18-inch active subwoofer designed for professional sound reinforcement. It seamlessly integrates with the SRX900 series, offering a high-density solution for demanding live events and installations. This subwoofer features two 18-inch woofers with Differential Drive technology for superior heat management and dynamic range. Integrated DSP and Class-D amplification ensure optimal, consistent performance globally with a simple plug-and-play setup. Its robust design includes reinforced 18mm plywood enclosures and a large central port for minimized turbulence at high output levels.
$4199.00
Owner Satisfaction
4.8
/ 5
Category Rank
151
/ 6561
#151 in Speakers
Price vs Category Average
+187%
Above average
System Type
Active Subwoofer
/ Active Subwoofer
Who it's for
- Touring professionals prioritizing efficient rigging and transport
- Large venue engineers needing massive, room-filling low-end power
- System integrators requiring precise, network-based sound tuning
Who should skip it
- Budget-conscious buyers seeking entry-level or passive alternatives
- Small venue operators with limited storage or transport space
- Novice users intimidated by complex software and network management
Performance breakdown
Low Frequency Output
Dual 18-inch drivers deliver massive, room-filling bass with authoritative impact.
Thermal Efficiency
Differential Drive technology keeps performance stable during the most demanding sets.
System Integration
Seamlessly pairs with SRX900 series for a cohesive, professional sound ecosystem.
Portability
Truck-pack friendly dimensions make logistics manageable for touring production crews.
Build Durability
Reinforced plywood enclosure stands up to the rigors of constant transport.
Setup Simplicity
Integrated DSP and plug-and-play amplification minimize time spent on configuration.
Key Specs
System Type
Active Subwoofer
LF Driver
(2) JBL 2279H-1, 18 inch diameter
Continuous Power Rating
1,100 Watts
Maximum SPL
140 dB
Frequency Range (-10dB)
31 Hz-100 Hz
Amplifier Design
Class-D
Dimensions (H x W x D)
22.2 in x 47.4 in x 26.8 in
Net Weight
155 lbs
Features
- Dual 18-inch woofers with Differential Drive
- Built-in DSP and Class-D amplification
- High-performance, high-density system
- Truck-pack friendly for easy transport
- Full control via software or LCD
- High output capability up to 140 dB
- Durable reinforced plywood enclosure
- Seamless integration with SRX900 systems
What customers say
The JBL SRX928S earns high praise for its exceptional performance in large sound reinforcement settings. Users consistently report immense, articulate low-frequency output that remains clear even at very high volumes. A key theme is the seamless integration provided by the efficient built-in amplification and advanced digital signal processing, which simplifies system tuning. Reviewers also value the rugged, road-ready build quality, confirming its durability for professional touring demands. While the investment is significant, customers overwhelmingly agree that the superior headroom and controlled low-end impact justify the premium cost, establishing it as a reliable, long-term asset for serious audio needs.
Know before you buy
Yes, while it is optimized for seamless integration with the SRX900 series, it can be used with other professional sound reinforcement systems. You will need to manage the crossover and system tuning externally if you are not using the integrated DSP presets designed for the SRX900 family.
The SRX928S features a built-in Class-D amplifier, so you do not need an external power amp. It is designed for global use, meaning it can handle various voltage standards, but ensure your power distribution can support the high-output demands of a dual 18-inch system.
You can manage the DSP settings directly via the rear-panel LCD screen for quick adjustments on-site. For more granular control and system configuration, you can connect the subwoofer to a computer and use JBL’s dedicated software.
Yes, the enclosure is built from reinforced 18mm plywood, making it durable enough for the rigors of touring. Its truck-pack friendly dimensions also make it a practical choice for rental houses and venues that need to move equipment frequently.
The central port is specifically engineered to minimize air turbulence. This design helps maintain clean, punchy low-frequency output even when you are pushing the system toward its 140 dB maximum SPL limit.
The SRX928S weighs 155 lbs. While it is a substantial piece of gear, its dimensions are optimized for efficient truck packing, and it is manageable for a two-person crew using standard professional audio handling practices.
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