18" Compact Subwoofer
The JRX218S is driven by a massive JBL 18" woofer with a cast frame and 3" voice-coil.


  • 18 in. compact subwoofer.
  • 350 W (continuous), 1400 W (peak) power capacity.
  • The rugged enclosure is constructed from 19 mm (.75 in) MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for durability and improved low-frequency performance. The enclosure is covered in black carpet.
  • A top mounted, cast aluminum 35 mm pole mount receptacle can receive an optional SS3BK pole to facilitate use of the JRX218S as a base for a midhigh speaker cabinet.
  • Non-resonant, all steel handles are used.
  • Attractive 18-gauge perforated steel grille protects components from damage.


Power Rating 350 W / 1400 W Frequency Range (-10 dB) 34 Hz - 250 Hz Frequency Response (±3 dB) 53 Hz - 250 Hz Sensitivity (@1m) 98 dB SPL Nominal Impedence 4 ohms Recommended Amplifier Power 350 W to 700 W into 4 ohms Maximum SPL 133 dB Dimensions
(H x W x D)
605 mm x 508 mm x 551 mm
(23.5 in x 20.3 in x 22 in) Net Weight 32.2 kg (71 lb) Low Frequency Driver M118-4 Input Connectors Neutrik® Speakon® NL-4 (x2); parallel