JBL STX818S Passive 18" Bass Reflex Subwoofer

Model #STX818S

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Packaging Info

Package Weight 109.005 lb

General Information

System Type 18" bass-reflex subwoofer
Frequency Range 35 to 250 Hz (-10 dB)
Frequency Response 40 to 120 Hz ±3 dB
Input Connection Type Switchable, +1/-1 or +2/-2
Low Pass Crossover 80 Hz, 24 dB, octave LPF
High-Pass Filter 30 Hz, 24 dB, octave HPF
Power Handling 1,000W continuous 2,000W program 4,000W peak
Maximum SPL 132 dB SPL peak
Sensitivity 96 dB SPL (1W @ 1 m)
Low Frequency Driver 1 x JBL 2242H 18" (457 mm) Super Vented Gap Cooled woofer
Active or Passive Passive
Enclosure Tuning Designed for Crown amplifiers and dbx DriveRack
Mounting Options Top mounted M20 threaded socket for optional SS4-BK pole
Enclosure Rectangular, 0.71" (18 mm) 13-ply birch/poplar laminate plywood
Handle or Carrying Type 4 side handles, bottom mounting points for optional casters
Finish Black DuraFlex finish
Grille Powder coated, black, 14-gauge perforated steel with acoustical transparent cloth backing
Input Connectors 2 x Neutrik Speakon NL-4
Dimensions (H x W x D) 22.0 x 22.4 x 28.3" (558 x 568 x 718 mm)
Weight 100 lb (45 kg)
Nominal Impedance
User Reviews
8 March 2014

I have been using JBL since I started DJing 26 years ago. This model optimizes what JBL is about. High quality for high demanding musicians and DJs. It's a great sounding, high powered sub and I am looking forward to purchasing another.

Product Highlights
  • Handles 1,000W of Continuous Power
  • 2,000W Program / 4,000W Peak Handling
  • 8Ω Nominal Impedance
  • Provides up to 132dB SPL
  • 80Hz Low-Pass Crossover
  • 30Hz High-Pass Filter
  • Neutrik Speakon NL-4 Input Connectors
  • Durable Enclosure Design
  • Pole Mount Cup for Full-Range Speaker
In The Box
  • JBL STX818S Passive 18" Bass Reflex Subwoofer
  • Limited Warranty: 5-Years Enclosure / 1-Year Components
Still Have Questions?
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