Single 18” Bass Reflex Subwoofer.
A single 18" compact high power subwoofer system in a front-loaded, vented enclosure designed for minimum frontal area provides 1,000 watts of continuous pink noise power handling, 2 kW program and 4 kW peak. The STX818S also comes equipped with a top-mounted M20 pole-mount and an optional wheel kit.

Features:

• 18 in. Super Vented Gap woofer for extended low-frequency output.
• Large port area for reduced distortion.
• 20 mm threaded pole socket for solid, secure satellite speaker mounting.
• Rugged DuraFlex coated enclosures sized to be truck pack friendly.
• 14-Gauge steel grille lined with acoustically transparent cloth.

Specifications:

• Frequency Range ( –10 dB) : 35 Hz-250 Hz
• Frequency Response (± 3 dB) : 40 Hz-120 Hz
• Sensitivity (1W/1m) : 96 dB
• Power Rating : 1000 W / 2000 W / 4000 W (Continuous/Program/Peak)
• Rated Maximum SPL : 132 dB SPL Peak
• Nominal Impedance : 8Ω
• Input Connectors : Two NL4
• Operational Modes : Subwoofer
• Dimensions (H x W x D) : 558 mm x 568 mm x 718 mm. (22.0" x 22.4" x 28.3")
• Net Weight : 45 kg (100 lbs)