18" Passive Subwoofer System

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18" Passive Subwoofer System

SRX818S is a single 18” subwoofer for concert, touring, or installed use. Featuring a standard M20 pole cup for use with top boxes, indexing feet for stacking in both the standard and cardioid position, and a 136dB max SPL, the SRX818S is an ideal solution for musicians, bands, and DJs, concert use, public speaking, or installations such as performance venues, corporate spaces, educational facilities or houses of worship. Tunings and presets are available for Crown ITech HD.



  • Premium JBL Transducers
  • Rugged, versatile enclosures
  • Tunings available for Crown amps and dbx signal processors
  • Fully supported in Audio Architect
  • Power Handling: 2400W Peak, 1200W Program, 600W Continuous
  • Frequency Range: 28Hz-150Hz
  • Frequency Response: 45Hz-150Hz
  • Max SPL: 129dB (Peak)
  • Amplification options: Passive
  • 2279 LF 8 Ohm 18” Woofer


  • Live performance systems.
  • Mobile and fixed DJ systems.
  • Sound system rental and tour.
  • Permanent installations.



Every detail in the SRX800 Series was purposefully designed and thought through with full consideration for its intended use. Ergonomically designed handles support an easy, non-fatiguing grip for streamlined handling. M10 suspension points, indexed feet, and pole/tripod mounts support a wide, flexible array of configurations.


JBL’s patented Differential Drive® Technology ferrite drivers incorporate 3" voice coils with lower mass ferrite magnets for reduced weight, increased power handling, exceptionally low distortion and extended low frequency response. JBL’s 2432H is the only neodymium 3" voice coil compression driver in this class, delivering very high power levels and smooth, crystal clear sound.


  Version Language Size Uploaded
SRX818S Spec Sheet
version 11_11_19, updated: Dec 17, 2019
11_11_19    627 KB Dec 17, 2019
SRX800 Passive Series Compliance
updated: Oct 02, 2019
    139 KB Oct 02, 2019
Audio Architect
updated: Apr 29, 2019
    9.96 KB Apr 29, 2019
SRX Connect
updated: Oct 09, 2019
    Oct 09, 2019
HiQnet Audio Architect
updated: Jan 15, 2020
    Jan 15, 2020
SRX Connect
updated: Oct 09, 2019
    Oct 09, 2019
Speaker Tunings
SRX800 Passive I-Tech 4x3500HD Tunings
updated: Feb 24, 2020
    41.3 KB Feb 24, 2020
SRX Passive Bi-amp tunings Table
updated: Oct 02, 2019
    2.69 MB Oct 02, 2019
SRX800 Passive I-Tech HD Tunings
updated: Feb 24, 2020
    23.7 KB Feb 24, 2020
SRX800 Driver
updated: Apr 29, 2019
    158 KB Apr 29, 2019
SRX800 Handle
updated: Apr 29, 2019
    208 KB Apr 29, 2019
SRX818S Angle No-Grill
updated: Jul 01, 2019
    314 KB Jul 01, 2019
SRX818S Angle
updated: Jul 01, 2019
    498 KB Jul 01, 2019
SRX818S Front
updated: Jul 01, 2019
    429 KB Jul 01, 2019

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System Type Passive 18”, subwoofer system
Maximum SPL Output 123dB (Continuous), 129dB (Peak)
Frequency Response (-10dB) 28hz - 150hz
Frequency Response (-3 dB) 45hz - 150hz
Sensitivity (1W, 1m) 95dB
System Power Rating 2400W Peak , 1200W Program, 600W Continuous
Nominal Impedance 8 Ohm
Inputs NL4 Input, NL4 Loop-thru (+/-1 or +/-2 Selectable)
Operational Modes Passive
LF Driver 2279H
Crossover Frequency 80hz
Enclosure 18mm Duraflex coated plywood
Suspension/Mounting M20 Threaded Pole Mount
Casters Accepts JBL WK-4S Kit
Handles 4
Finish Obsidian Duraflex™ finish
Grille Powder coated, Obsidian, 14-gauge perforated steel with acoustically transparent black cloth backing
Dimensions (H x W x D) 683mm x 684mm x 575mm (26.89in x 26.92in x 22.62in)
Weight 78.0 lbs (35.4kg)
Shipping Weight 88 lbs (40.2kg)