Description
RCF SUB 15-AX – Powerful 15-inch active subwoofer with DSP
The RCF SUB 15-AX is a professional active 15-inch subwoofer specifically developed for live sound, DJs, bands, events, and mobile PA systems. Thanks to its combination of high output, compact dimensions, and extensive DSP capabilities, this subwoofer is exceptionally versatile.
The SUB 15-AX features a high-quality 15-inch woofer with a 3-inch voice coil. The woofer is housed in a bass-reflex enclosure and driven by a powerful 2,200 Watt Peak Class-D amplifier. This allows the subwoofer to reach a maximum sound pressure level of 133 dB SPL. The frequency range spans from 35 Hz to 120 Hz, delivering both deep sub-bass and powerful punch convincingly.
A major advantage of the SUB 15-AX is the extensive built-in DSP. Various system settings can be easily adjusted via the 2.4-inch color touchscreen and rotary encoder. The subwoofer features digital crossover presets, routing, delay, and a parametric 8-band EQ.
RCF has also developed presets that allow the SUB 15-AX to be easily paired with various RCF top speakers. This enables the subwoofer to act as the central heart of a complete PA system. The crossover and time alignment can be precisely tuned to the top cabinets being used.
For larger or more advanced systems, a cardioid configuration is also possible. Additionally, the SUB 15-AX supports 2.1 and 2.2 configurations. Via the RCF LiveRemote App, crossover presets, system EQ, and delay can be adjusted remotely via Bluetooth.
The built-in Bass Motion Control monitors the woofer’s excursion and ensures the speaker remains controlled even at very low frequencies. This results in powerful bass reproduction without unnecessary restriction of the woofer.
The enclosure is made of sturdy plywood and finished with a robust polyurea coating. The steel grille protects the woofer during transport and use. Thanks to the M20 pole mount, a suitable RCF top cabinet can be placed directly on top of the subwoofer.
With a weight of 31.4 kg, the SUB 15-AX is also relatively manageable for a professional 15-inch subwoofer.
RCF SUB 15-AX – 15-inch power, 2,200 Watt Peak, 133 dB SPL, and professional DSP. A compact yet very powerful subwoofer for the serious PA world.









