JBL SRX918SF 18-inch Subwoofer
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- Brand new in original box
- Full JBL manufacturer's warranty
- Free shipping in the continental US
Out of stock
- SKU
- JBL-P3366MX
. Description
JBL SRX918SF 18-inch Powered Subwoofer
The SRX918SF is a heavyweight subwoofer engineered for large-scale sound reinforcement applications where deep low-end extension and controlled directivity are non-negotiable. This is a purpose-built tool for touring sound engineers, installed systems designers, and rental companies that demand consistent, articulate bass reproduction in venues ranging from mid-sized clubs to outdoor festivals.
Acoustic Performance
The 18-inch dual voice-coil driver paired with a 2,500-watt Class D amplifier delivers a linear frequency response down to 35Hz and maximum output of 134dB SPL. This combination produces the authoritative bottom end and dynamic headroom necessary for demanding live sound mixing without compression artifacts or distortion.
Design & Deployment
Built from 18mm reinforced birch plywood and equipped with an integrated three-point rigging system, the cabinet handles both ground-stacked and suspended configurations. Dual etherCON Ethernet ports enable networked control and real-time DSP adjustment across multiple units in complex system topologies.
Key Features
- 18-inch JBL 2279G-1 driver with Differential Drive technology and dual 3-inch voice coils
- 2,500-watt Class D amplifier
- 35Hz linear frequency response
- 134dB maximum SPL output
- LevelMax limiting and 24 user-adjustable DSP filters
- 2,000ms signal delay for phase-aligned multi-unit arrays
- Array Size Compensation and FIR-based Throw Distance Correction
- 18mm reinforced birch plywood cabinet construction
- Integrated three-point rigging system for suspended or ground-stacked deployment
- Dual etherCON Ethernet ports for networked control
- Universal power supply
- 4-ohm driver impedance
The SRX918SF combines raw output capability with sophisticated onboard DSP processing and flexible rigging options, making it a reliable workhorse for professional sound systems.
More Information
| Condition | New |
|---|---|
| Country of Manufacture | Mexico |
Reviews
At a Glance
The JBL SRX918SF is an 18-inch powered subwoofer engineered for touring and large-venue sound reinforcement, delivering 134dB SPL output with linear bass extension down to 35Hz and sophisticated DSP processing for phase-aligned multi-unit arrays. Built from reinforced birch plywood with integrated rigging for both ground-stacked and suspended setups, it handles the demands of mid-sized clubs through outdoor festivals without compression or distortion. This is the workhorse choice for sound engineers and rental companies who need articulate, controlled bass that sits reliably night after night on the road.
Who This Is For
Great for
- ✓ Live Performance
- ✓ Touring
- ✓ Large Venue Sound Reinforcement
- ✓ Festival Systems
Not the best pick for
- – Home Recording
- – Practice
- – Small Venue Applications
Skill level: Professional
Frequently Asked Questions
What makes the SRX918SF different from smaller subwoofers?
The 18-inch JBL driver with dual 3-inch voice coils, paired with a 2,500-watt Class D amplifier, delivers 134dB SPL maximum output and linear bass down to 35Hz—far more output and extension than compact subs. It includes networked DSP with 24 user-adjustable filters, Array Size Compensation, and Throw Distance Correction, enabling precise phase alignment across multiple units in complex live systems.
Can it be rigged or suspended?
Yes. The SRX918SF features an integrated three-point rigging system and 18mm reinforced birch plywood cabinet designed for both ground-stacked and suspended configurations, making it flexible for touring, festival, and installed-venue deployments.
How do I control and network multiple units together?
Dual etherCON Ethernet ports allow networked control and real-time DSP adjustment across multiple units. The onboard DSP includes Array Size Compensation and FIR-based Throw Distance Correction to automatically phase-align subs in complex system topologies.
What is the frequency response and output capability?
The SRX918SF delivers a linear frequency response of 35Hz and a maximum SPL output of 134dB, with sufficient dynamic headroom to handle demanding live sound mixing without distortion or compression artifacts.
Is this suitable for small venues or home use?
No. This subwoofer is engineered specifically for touring, large-venue sound reinforcement, festivals, and installed systems. Small venues, home recording, and practice applications do not require its output capacity or complexity.
Do I pay sales tax on this order?
We collect sales tax only on orders shipped to California. Orders shipped to any other US state are charged $0 sales tax at checkout when you buy direct from our website. Marketplaces such as eBay, Reverb and Amazon collect sales tax in nearly every state as marketplace facilitators no matter who the seller is, so the same item at the same price costs less bought direct. Free US shipping and 30-day returns are included. Some states ask buyers to self-report use tax on out-of-state purchases.
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