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.

Features

• Power Rating : 350 W / 1400 W
• Frequency Range (-10dB) : 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 (1m) : 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)
• LF Driver : M118-4
• Inputs : Neutrik Speakon NL-4 (x2); parallel
• Enclosure : MDF (Medium Density Fiberboard) covered in black carpet.