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SUB 9000

A New Definition of Bass

Commanding bass in a compact, tour-ready cabinet design, enhanced by advanced RDTap contactless configuration, ACE factory-tuned crossover presets and RDnet networked management.
Unleash the pristine power of low-frequency reproduction with RCF SUB high-performance active subwoofers. Deliver up to 142 dB SPL with up to 8000 Watts Class-D amplifiers and high-excursion Precision Transducers. Experience effortless system control via RDNet and groundbreaking contactless configuration with the RDTap app for easy setup, all wrapped up in a tour-ready subwoofer ideal for audio professionals who expect the very best.
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Simplified Tuning. Unrivaled Control.

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.
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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.
LINK OUT - MALE XLR SIGNAL OUTPUT
The male XLR output connector provides a loop-through feature, enabling daisy-chaining of additional speakers. The connector is wired in parallel with the input and can also be used to send the audio signal to supplementary devices like other powered speakers or amplifiers.
XOVER OUT - MALE XLR SIGNAL OUTPUT
This balanced male XLR output is specifically engineered to feed RCF satellite speakers. Its configuration can be customized by loading a preset via the RDTap app, ensuring seamless integration between the subwoofer and satellite speakers.
LEVEL SELECTOR
The seven-position level selector provides attenuation from 0 dB (no reduction) to –12 dB in 2 dB increments. This precise adjustment helps optimize system performance by preventing clipping or distortion from overly strong input signals, thereby ensuring seamless integration with other audio components.
SETUP SELECTOR
The setup selector is a four-position rotary switch that governs the operating configuration of the subwoofer. The available settings are:
1 – Low-Pass Filter at 60 Hz
2 – Low-Pass Filter at 80 Hz
RDNET – RDNet-based configuration
RDTAP – App-Based Configuration
SERVICE: USB-C PORT
A dedicated USB-C port is provided for service access. The recommended method for updating the internal firmware is via RDNet.
SUB MUTE BUTTON
When the SUB MUTE button is pressed, the subwoofer enters a muted state. In this mode, the button illuminates red to clearly indicate that the subwoofer is muted. Simultaneously, the DELAY, PHASE, and CARDIOID LEDs on the RDTAP panel also light up red, offering additional visual confirmation—even from a distance.
DATA IN – DATA LINK: RDNET INPUT/OUTPUT SECTION
The RDNet In/Out section is equipped with etherCON connectors for seamless integration within an RDNet network. This connectivity enables comprehensive system control and monitoring via RDNet software, allowing for precise adjustments and real-time feedback in advanced audio management.
FUNCTION AND STATUS INDICATION LED
  • SIGNAL LED
  • CONFIG LED
  • DELAY LED
  • POLARITY LED
  • CARDIOID LED
RDTAP AREA
The RDTAP Area is a specialized feature on the subwoofer panel that facilitates streamlined configuration transfer even when the subwoofer is unpowered. By placing a smartphone running the RDTap app near this designated area, users can wirelessly transmit a pre-designed system configuration directly to the subwoofer or receive the current configuration to the app.
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Heritage

RCF’s legacy includes pioneering advanced transducer technologies and the application of high-tech materials.

Endurance

Our models are subjected to a rigorous evaluation process, featuring a 200-hour continuous signal test designed to challenge the transducers’ limits.

Vanguard

RCF is at the forefront of technological advancements, continually striving for the optimal listening experience.

16” and 19” Custom Design

SUB 9000 subwoofers feature the latest transducer technology developed in our labs. The basket size has been increased, allowing the ultra-long-excursion moving mass to displace a greater volume of air. The motor section includes lightweight aluminum-core coils, high-damping cellulose cone material, composite spiders, and a 4-layer inside–outside voice coil, ideal for fast acceleration and industry-leading transient response. Despite their compact, lightweight footprints, SUB 9000 subwoofers produce powerful yet articulate bass, remaining true to even the most subtle low-frequency variations.

High-Grade Materials

The inclusion of a high-damping cellulose cone, double polycotton-polyurethane spiders for outstanding stability and control over the moving mass, and a substantial heavy-gauge treated triple cloth surround, contribute to the moving mass’s exceptional strength and excursion control. Additionally, a water-repellent treatment ensures suitability across various environments.

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.
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ADVANCED CROSSOVER ENGINE

FACTORY-TUNED PRESETS FOR PERFECT SUB-TOP PAIRING
THE FIRST SOLUTION OF ITS KIND FOR EFFORTLESS AND PRECISE AUDIO ALIGNMENT
Better Efficiency, Faster Setup
With RCF’s ACE-compatible speakers, users can now leverage the technical expertise of RCF’s system engineers at the touch of a button. As an industry first, RCF offers effortless alignment of subs and tops by quickly recalling presets from RDTap. This innovative approach saves time and ensures precise and consistent audio performance across various venues and setups, making advanced audio calibration accessible to a broader user base. 
Sub-Top Synergy for Unmatched Low-End Power
ACE operates across a broader frequency range than the typical crossover range, allowing the speaker to extend its operation to the lowest frequency available, and gain all the advantages of FiRPHASE technology. ACE transforms a sub+top system into a factory-tuned 3-way system, ensuring increased bass impact, low distortion, and improving overall sound quality.
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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.
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. 
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Sub-Top Pairing: Measurements before (Red line) and after alignment (Green line).
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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

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[4] HDL 30-A line array modules and [3] SUB 9029-AS subwoofers in cardioid configuration.

SUB 9029-AS

Explore all configuration options between the SUB 9029-AS and ACE-compatible satellite RCF speakers.

SUB 9019-AS

Explore all configuration options between the SUB 9019-AS and ACE-compatible satellite RCF speakers.
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[4] HDL 28-A line array modules and [3] SUB 9019-AS subwoofers in cardioid configuration.
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[4] HDL 26-A line array modules and [3] SUB 9016-AS subwoofers in cardioid configuration.

SUB 9016-AS

Explore all configuration options between the SUB 9019-AS and ACE-compatible satellite RCF speakers.
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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.
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Tour Grade Solution

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Built to brave any weather

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.

DOWNLOAD GUIDE >
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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.