RCF SUB 18-AS Active Subwoofer

Powerful Subwoofer for Precise and Deep Bass!

The RCF SUB 18-AS is an active 18" subwoofer that delivers impressive power and sonic precision. Equipped with a 2,200-watt Class-D amplifier, it achieves sound pressure levels up to 135 dB and offers extended bass response from 35 Hz to 400 Hz. Designed for professional live sound applications, the subwoofer provides powerful, clear low-frequency reproduction — ideal for small to medium stages, clubs and mobile PA systems.

Maximum Power With Class-D Amplifier

The integrated 2,200-watt Class-D amplifier provides generous headroom and responds with high dynamics to transients. Efficient thermal management removes the need for a fan, making operation silent and maintenance-free. The amplifier is securely mounted in the enclosure and ensures even heat dissipation via a robust heatsink.

Precise 18" Woofer With 4" Voice Coil

The specially developed RCF Precision Transducer with an 18" cone and 4" voice coil guarantees maximum fidelity. The magnetic circuit is engineered to minimize distortion and keep bass reproduction linear — even at high levels. The result is precise, punchy and deep-reaching bass that enhances any performance.

Bass Motion Control Technology

Using the Bass Motion Control algorithm, RCF replaces the traditional high-pass filter with intelligent control of the woofer excursion. This keeps bass reproduction stable even at extreme levels while preserving phase response. The outcome is a particularly clear, controlled and still powerful low end.

Flexible Connections and Advanced Control

The connection panel offers mono/stereo XLR/TRS combo inputs, an XLR stereo link and XLR outputs with an integrated crossover. Additionally, volume, polarity and the low-pass frequency can be individually adjusted to optimally integrate the subwoofer into any system.

Rugged Tour-Grade Cabinet for Mobile Use

The birch cabinet is finished with a durable polyurea coating. This combination provides high stability, scratch resistance and a long-lasting finish. With integrated handles, the SUB 18-AS is easy to transport and perfectly suited for mobile use.

Experience Deep, Precise Bass With the RCF SUB 18-AS - Powerful, Compact and Professional!