The Topp Pro KS18A SUB is a powerful active subwoofer engineered to deliver deep, authoritative low-end support for professional sound systems. Its robust 18″ woofer with a 3″ sandwich voice coil ensures high-impact bass response, while the active crossover and protection circuitry safeguard both performance and speakers. Designed for clubs, concert venues, and mobile rigs, it complements satellite speakers with precision and power.
 
With a 2,000W program rating and 4,000W peak power capability, the KS18A SUB delivers up to 129 dB SPL. The analog band-pass crossover setting (12 dB/oct) and dedicated controls—such as volume, phase switch, and 80 Hz high-pass filter—make integration with satellite systems seamless. Built-in protections include thermal shutdown, overload limiting, and compression, while its plywood cabinet, metal grille, and pole-mount design offer durability and installation flexibility.