RCF SUB 905-AS MK3 Active Subwoofer

Powered Subwoofer Engineered for Mobile Professionals

At 31.3 kg, the SUB 905-AS MK3 packs tour-level output into a single-person-portable all-wood cabinet. RCF integrates a 15-inch transducer, Class-D amplification, and full DSP processing into one enclosure — rear-panel presets printed on the chassis eliminate guesswork during fast load-ins.

Bass Motion Control and Cardioid Array Capability

With proprietary Bass Motion Control, driver excursion and phase remain tightly managed, so low frequencies stay consistent even at peak output. Activate cardioid mode to focus bass energy toward the audience and reduce vibration on stage, a setup usually requiring dual subs and extra processing.

Amplification and Driver Specifications

The Class-D amplifier supplies 2200 W peak to a 15-inch woofer with a 3.0-inch voice coil and ceramic magnet, minimizing distortion across the sub-bass spectrum.

• Frequency Range: 40 Hz – 120 Hz — DSP presets let you select the crossover points that fit your system.
• Thanks to convection via an aluminum heat exchanger, cooling is silent and free of moving parts.

Cabinet Construction and Transport

Multi-ply hardwood with polyurea coating withstands repeated transport and stacking. Designed for ergonomic handling, the enclosure's compact footprint means it can be managed by a single technician.

• Dimensions: 590 × 420 × 590 mm — stackable, vehicle-friendly form factor
• The M20 threaded insert accommodates standard speaker poles for flexible system setups.

Signal Flow and System Integration

Stereo XLR I/O with switchable link/crossover output modes routes audio to downstream cabinets. Onboard DSP provides gain, EQ, phase, delay, and cardioid controls accessible through a rear-panel rotary encoder and display.

• Power is connected via PowerCon IN/OUT, enabling mains passthrough to another subwoofer for efficient power management.
• Input Sensitivity: -2 dBu / +4 dBu selectable — matches both consumer and professional source levels.