RCF SUB708 AS MK3 1400W Powered Subwoofer

The SUB 708-AS mk3 redefines portable bass performance with its massive 18" transducer and cutting-edge Class-D amplification system. This high-power active subwoofer produces sound pressure levels up to 133 dB, making it the perfect companion for 8" or 10" loudspeakers in live sound applications. The rear panel provides comprehensive control with volume, EQ, polarity, and crossover frequency selection, while the rugged all-wood cabinet features a scratch-resistant polyurea coating for durability and portability.

RCF’s advanced transducer design pairs with a powerful 1400W peak Class-D amplifier that manages extreme sound pressure levels with ultra-fast attack and realistic transient response. The energy-efficient speaker design eliminates the need for cooling fans, with the amplifier mounted to a solid aluminium heat exchanger featuring no moving parts. The stereo input circuit incorporates a low distortion design with advanced safety limiter, maintaining signal integrity at all levels while meeting EN62368-1 safety standards.

Revolutionary BMC (Bass Motion Control) technology replaces traditional high-pass filters with intelligent woofer excursion management. This innovative system creates a complete map of the woofer’s dynamic behaviour, generating custom algorithms that only limit over-excursions while preserving total signal reproduction freedom. The result is extended bass response with enhanced linearity and superior sound integrity, handling the lowest audible frequencies without compromising woofer stability.

Built for professional touring and installation, the lightweight all-plywood cabinet features ergonomic handles with rubber grips for easy setup. The M20 threaded pole mount supports additional speakers, while the heavy-duty polyurea coating and powder-coated metal grille withstand rigorous use and transport. Acoustically transparent sound foam backing protects internal components from dust and humidity, and frontal vented ports allow placement in recessed spaces for maximum installation flexibility.