A New Definition of Bass. Simplified Tuning. Unrivaled Depth

High Power

Precision Transducers

Up to 8000 Watts

Power Amplifier

RDNet 

Networked Control

RDTap 

Contactless Configuration

Advanced Crossover Engine

Factory-Tuned Presets

Weather Resistant

Raincover included

RCF has created a groundbreaking solution for offline/unpowered device configuration. With RDTap, users can inspect and configure devices without needing to power  the device. Sound engineers can design a system within the RDTap App on the move and configure each subwoofer by tapping the RDTap logo, with RCF [patent-pending] contactless technology. As an alternative, RDNet management software enables comprehensive real-time control and monitoring of compatible, network-connected devices.

Drive the Rhythm of the Beat

With up to 8000 Watts of power, our Class-D amplifier can manage extreme sound pressure levels with an ultra-fast attack, realistic transient response, and very low thermal loss. 

The stereo input circuit features a low distortion design with an advanced safety limiter, maintaining the true character of the input signal at all levels. RCF amplifiers are designed according to EN62368-1 for maximum safety and present a Switch-Mode Power Supply section that combines high efficiency with minimum weight.

INPUT - FEMALE XLR INPUTS (BALANCED)

The system is equipped with female XLR connectors for balanced audio signals. These inputs are designed to accept professional-grade audio sources, ensuring full compatibility with standard audio equipment.

Advanced Precision Transducers

SUB 9000 Series subwoofers incorporate the latest transducer technology from our labs. Employing lightweight aluminum core coils, high-damping cellulose cone material, composite spiders and a 4-layer inside-outside voice coil, the ultra-long excursion moving mass gains high power with fast acceleration. Despite their small and lightweight footprints, SUB 9000 Series subwoofers produce powerful yet articulate bass, remaining true to even the most subtle low-frequency variations.

High-Class Neodymium

Neodymium, a rare-earth material, enhances efficiency, power handling, and weight reduction. Using a 20% stronger magnetic field than typical neodymium grades, this new design enables precise control and higher force.

ADVANCED CROSSOVER ENGINE

FACTORY-TUNED PRESETS FOR PERFECT SUB-TOP PAIRING

Pair your full-range speaker with RCF ACE-enabled SUBs and unlock your system's true potential.

RCF’s proprietary Advanced Crossover Engine (ACE) is engineered to precisely match the time delay and align the phase on a broader range than the usual crossover frequency range between RCF subwoofers and FiRPHASE-enabled full-range speakers. 

Breathe New Life Into Your Legacy Systems

When it’s time to upgrade, you don’t need to start over. Pair your HDL 20-A or HDL 6-A with our ACE-enabled RCF SUBs for a straightforward system update. You’ll benefit from factory-tuned presets and precise FiRPHASE filter tuning for enhanced sound performance; remote control via RDNet; simplified configuration with RDTap; system equalization; and delay alignment. And of course, all this is supported by the consistent low-end output of our latest RCF Precision Transducers.

Contactless Audio System Configuration

The RDTap app offers contactless communication with the subwoofer. Users can access pre-loaded presets to quickly configure RCF systems or optimize compatible speakers, subwoofers, and line arrays. Connect your speaker to the SUB. Select the preset from RDNet or RDTap - Confirm and you are ready to go.

RDTap enables contactless communication, offering setup management and parameter updates, even when the unit is unpowered. By tapping the RDTap logo at the back panel with a smartphone running RDTap, the app transfers to the unit every aspect of the defined setup, including preset configurations, equalization, mid-low compensation for line arrays, and precise delay and time alignment settings. Or read the status of the speaker.

This is especially convenient when upgrading your subwoofers and giving your old main system a new life, with the assistance of presets, EQs, delays, and management via RDNet.

Unlike other control technologies that operate over long distances, this solution focuses on near-field interactions, where security, precision, and unpowered operations before rigging are key. Data transmission occurs at close range, ensuring that changes are applied only when intended, without interference from further distances or external devices. This makes it a highly efficient and user-friendly way to manage the subwoofer’s settings and performance before setup takes place.

Configuration Examples

[4] HDL 28-A line array modules and [3] SUB 9019-AS subwoofers in cardioid configuration.

NETWORKED CONTROL AND MUCH MORE

RDNet is an advanced platform for integrated monitoring and control of sound systems - from small live and installed setups to massive arena systems. Based on a robust networked architecture, RDNet combines system control, line array design, and comprehensive audio measurements into a single powerful software package.

Engineers and technicians can intuitively manage every device on the network, from individual components to multiple groups. The platform provides full DSP control of compatible devices, with flexible configuration tools for perfectly tuning the system response at maximum speed. Users have real-time access and oversight of all key settings from a centralized interface.

Tour Grade Solution

Designed for rigorous touring, SUB 9000 Series subwoofers feature tour-ready, weatherproof plywood construction with a durable polyurea finish. The included magnetic rain cover protects the connection panel from rain and dust, while rugged powerCON TRUE1 TOP AC connectors ensure reliable power delivery in any environmental condition. Subs are stackable and lightweight, have ergonomic handles with rubber grips, and are designed for easy set-up and tear-down. M20 pole mounts on the top and side of the cabinet offer flexible top speaker placement. Connections for a detachable front cart are included, enabling easy transport on wheels (cart sold separately).

Modular Suspension Kit

The modular Subwoofer Suspension Kit is engineered for extreme flexibility and safety in flown subwoofer configurations. Designed with high-strength steel components and compatible with various subwoofer models, the system supports secure suspension of up to 9 units while also enabling adaptability for cardioid configurations. 
 
For specific part numbers, consult the Subwoofer Suspension Kit Reference Guide in the download section.

Bass Motion Control

When searching for an extended bass with enhanced performance, RCF engineers found a way to remove the high-pass filter, replacing it with a forward-thinking approach. Introducing BMC (Bass Motion Control), the newly advanced woofer excursion management feature. The speaker equipped with BMC can handle the lowest audible frequencies without affecting the woofer stability, with extended linearity and better sound integrity.

The BMC method works by creating a complete map of the dynamic behavior of the woofer, to generate a custom algorithm that only limits over-excursions. This gives total freedom of signal reproduction to the transducer. When high-pass filters normally protect the woofer motion from becoming destructive but change the phase behavior, the new BMC algorithm breaks conventional rules.

Acoustical specifications

Frequency Response: 30 Hz - 200 Hz

Max SPL @ 1m: 138 dB

Transducers

Woofer: 1 x 19'' neo, 4.0'' v.c

Input/Output section

Input signal: bal/unbal

Input connectors: XLR, RDNet Ethercon

Output connectors: XLR, RDNet Ethercon

Input sensitivity: -2 dBu/+4 dBu

Processor section

Protections: Thermal

Limiter: Soft Limiter

Controls: MUTE, VOL, PRESETS, RDTAP

RDNet: Onboard

Power section

Total Power: 4000 W Peak

Cooling: Convection/Forced

Connections: Powercon TRUE1 TOP IN/OUT

Standard compliance

Safety agency: CE compliant

Physical specifications

Cabinet/Case Material: Plywood

Hardware

2 x M20 pole mount accessories

Handles: 1 handle per side

Pole mount/Cap: M20 thread

Grille: Steel with clothing

Color: Black

Size / Weight

Height: 533 mm / 20.98 inches

Width: 755 mm / 29.72 inches

Depth: 713 mm / 28.07 inches

Weight: 53.4 kg / 117.73 lbs