RCF SUB 9004AS | 18in - 136 dB Active Subwoofer | 2800W with RDNet Control & DSP

RCF Sub9004-as  (RCF Sub9004AS)

Active Touring Subwoofer

RCF SUB 9004-AS is a high-power 18" active subwoofer designed for demanding touring applications and professional sound reinforcement. Equipped with a hyper-vented neodymium transducer, 2800W Class-D amplifier, and advanced RDNet remote control, it delivers exceptional low-frequency clarity, high SPL, and system flexibility.

RCF SUB 9004-AS Competitive Differences

• 2800W peak / 1400W RMS amplifier with 136 dB max SPL
• RDNet network control, onboard DSP, and delay settings

RCF SUB 9004-AS Description

The RCF SUB 9004-AS is purpose-built for concert-level sub-bass performance in live touring and rental environments. At its core is a custom 18" hyper-vented neodymium woofer featuring a 4" inside/outside voice coil and a composite cone made of carbon fiber, fiberglass, and cellulose—engineered for maximum rigidity and minimal distortion.

The onboard 2800W Class-D amplifier delivers deep and punchy bass from 30 Hz to 400 Hz, while a 32-bit DSP provides precise control over crossover points, limiter behavior, EQ, and delay. All settings can be accessed remotely via RDNet for real-time system tuning, monitoring, and integration with larger RCF arrays and full-range systems.

The rugged Baltic birch plywood cabinet is finished with weather-resistant treatment and includes M20 pole mounts on the top and side for flexible deployment. Built-in handles and compatibility with the optional kart dolly system simplify transport and stacking. Whether you're flying subs for large events or stacking them for mobile gigs, the SUB 9004-AS offers maximum performance and control in a road-ready format.

Model Features

• 2800W peak / 1400W RMS Class-D amplifier
• 18" neodymium woofer with 4.0" voice coil and hyper-ventilation
• 136 dB max SPL and extended low-frequency response (30 Hz)
• Onboard DSP with selectable crossover points and delay
• Fully RDNet compatible for remote system control
• Low noise 32-bit DSP with input gain, EQ, and presets
• Rugged Baltic birch cabinet with weatherproof finish
• Dual M20 threaded pole mounts and side handles

Model Specifications

• Max SPL: 136 dB
• Power Output: 2800W Peak / 1400W RMS
• Frequency Response: 30 Hz – 400 Hz
• Woofer: 18" neodymium with 4.0" voice coil
• Hi-Pass Frequencies: 35 Hz, 50 Hz
• Low-Pass Frequencies: Variable from 50 Hz to 400 Hz
• Input Connectors: XLR, RDNet Ethercon
• Output Connectors: XLR, RDNet Ethercon
• Power Connections: PowerCON IN/OUT
• Cabinet: Baltic birch plywood, black finish
• Dimensions: 27.56 x 21.97 x 27.56 in (700 x 558 x 700 mm)
• Weight: 125.66 lb (57 kg)

What's In The Box

• RCF SUB 9004-AS Subwoofer
• Power cable
• User manual