JBL PRX818XLFW 18" Active Extended Low-Frequency Subwoofer System with Wi-Fi

The JBL PRX818XLF is a self-powered extended low-frequency subwoofer system. Featuring a JBL 18-inch woofer powered by a 1500-watt class-D amplifier, PRX818XLF delivers incredible output in a lightweight and compact form factor.


  • Built-in Wi-Fi for wireless control of your system from anywhere in the venue
  • Free PRX Connect mobile app for iOS and Android provides wireless control over volume levels, 8-band parametric EQ, and up to 50ms of speaker delay to fine-tune your sound
  • The class-leading 1500-watt amplifier delivers ample power to fill your venue
  • JBL Differential Drive transducers for higher SPL in a lightweight design
  • Next-generation JBL neodymium compression drivers
  • Redesigned Crown input technology, including XLR, 1/4, and RCA inputs plus XLR loop-through
  • Intelligent variable-speed fan activates only when needed to reduce noise
  • Updated tuning delivers flat frequency response and smooth off-axis behavior
  • Durable wooden cabinets, tour-proven DuraFlex‚ finish, and dent-resistant 16-gauge grilles
  • Universal power supply for worldwide compatibility
  • dbx Type IV‚ limiting ensures clear, accurate sound at high volumes
  • Brutal testing regimen‚ including the famous JBL 100-hour power test‚Äîensures reliable performance

System Type
Self Powered 18 subwoofer
Maximum SPL Output 134 dB peak
Frequency Range (-10dB) 30 Hz - 103 Hz
Frequency Response (±3 dB) 35 Hz - 87 Hz
Input Connectors
Two Balanced female XLR/ 1/4‚ combo connectors
Input Impedance
20K Ohms (balanced)
Signal Indicators
Limit: Yellow LED indicates peak output has been reached and dsp limiter is acting Signal: Green LED indicates signal present Power: Blue indicates system has power and ready
Dynamic Control (Input)
dbx Type IV‚ limiter circuit
System Low Pass 80 Hz
Loop out Crossover Frequency
80Hz Digital 24db/octave Linkwitz-Riley Filter
Highly efficient Class-D amplifier
Power Rating 1500W
AC power input
100V - 240V ~ 50/60 Hz
LF Driver
1 x JBL 2278G 460 mm (18 in) woofer
Rectangular, 18 mm, birch-poplar mix
2 x injection molded handles with backing cup
Obsidian DuraFlex‚ finish
Powder coated, Obsidian, 16 gauge perforated steel with acoustical transparent black cloth backing.
Dimensions (H x W x D)
692 mm x 523 mm x 724 mm (27.26 in x 20.6 in x 28.5 in)
Net Weight
36.28 kg (80.0 lb)
Gross Weight
45.0 kg (100.0 lb)