RCF SUB 708-AS MK3 18″ Active Subwoofer

Designed for professional live sound environments, the SUB 708-AS MK3 is a high-performance 18” active subwoofer built with a robust ceramic magnet driver and an energy-efficient Class D amplifier. It delivers up to 133 dB SPL, providing tight, extended low-end performance. Ideal as a low-frequency extension to 8” or 10” full-range speakers, it features user-configurable rear panel controls for volume, EQ, crossover, and polarity. The cabinet is made of durable Baltic birch plywood, finished with a protective polyurethane coating, and equipped with ergonomic handles and a top-mounted M20 pole socket. RCF’s exclusive Bass Motion Control (BMC) technology ensures enhanced low-frequency response with greater stability and natural sound reproduction. Suitable for portable PA setups and small to mid-sized venues.

Features

• 1400W Class D amplifier

• 18” subwoofer in a bass reflex enclosure

• Stereo crossover with switchable frequency

• Polarity reversal switch

• Electronic equalization and progressive limiter

• XLR stereo inputs and outputs

• Bass Motion Control (BMC) technology

• Durable Baltic birch cabinet with scratch-resistant coating

• M20 pole mount and ergonomic handles

• Convection cooling, no fan required

Specifications