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2kW FM Transmitter Stereo DDS with RDS and Audio Processing | AAREFF

2000 WATTS RF OUTPUT
STEREO WITH AUDIO PROCESSING
DYNAMIC RDS
48VDC or 90-260VAC OPTION
USB 192 KHz 24 bit OPTION
INCLUDES SHIPPING
5 YEAR WARRANTY
EXCEEDS CE/FCC TECHNICAL SPEC.
MODULAR 1kW + 1kW LDMOS DESIGN

5 YEARS
LIMITED WARRANTY MORE INFORMATION

2000W (2kW) FM Transmitter: Modular LDMOS Design

Engineered with 29 years of market experience, the Aareff 2kW system is the professional choice for high-fidelity regional FM coverage. It is purpose-built to guarantee maximum air-time reliability, allowing you to overcome the most demanding broadcasting environments worldwide.

Why Broadcasters Choose the Aareff 2kW:

Zero-Downtime Architecture: Never risk dead air. Dual 1kW LDMOS amplifier blocks and a high-precision Wilkinson combiner ensure your station stays broadcasting at half-power even during routine servicing or a module failure.
Engineered for Extreme Topographies: Designed to punch through rugged terrain and maximize your EIRP over vast distances, making it the ideal high-power solution for the mountains of Mexico, the archipelagos of the Philippines, and the wide-open rural expanses of Brazil and Australia.
Unyielding Resilience & Compliance: Built to withstand severe grid instability in markets like Nigeria, while strictly exceeding the rigorous FCC and EU ETSI technical specifications required in regulatory zones like Romania.

RF Specification

All stated measurements were made at 220VAC at 27 Deg. Celsius ambient temperature unless stated.

Power Output	Adj. 1-2000 Watts into 50 ohms
Spurious Emissions	Less than -75 dB ref to carrier
Harmonic Emissions	Less than -70 dB ref to carrier
Freq Stability	+/- 1 KHz max. typ. +/-300 Hz
Deviation Sensitivity Stability	+/-2 % max
Freq Fine Adj	> +/- 1000 Hz
Freq Range	87.5 to 108 MHz in 100 KHz steps
Out of Lock RF Muting	Less than -70 dB ref to carrier
Residual AM	Less than 0.5 %
Synchronous AM	Less than 0.5 %
RF Ruggedness	Any VSWR phase or length of time
Output Connector	DIN 7-16
Operating Temp	-20 to +40 Deg C

AF Specification

Pre-emphasis	(50 uS/ 75 uS/ None) Selectable
Audio Input Connector	XLR True Balanced 600 ohm No Ground Ref./ Floating
Audio Input Sensitivity	+4 dBu for +/- 75 KHz dev.

Version	MPX	Stereo and Audio Processor
Signal To Noise Ratio	80dB	65dB
Frequency Response	30Hz-76KHz	30Hz-15KHz
Audio Distortion	Better than 0.1% / 60dB THD	Better than 0.1% / 60dB THD

AC Specification

Input Voltage	90-264 V AC 135-370 V DC 47-63 Hz
Input Power	3000W for 2000W RF OUT with RF SWR less than 1.5
Working Humidity	20-90% RH non-condensing
Safety Standards	UL60950-1 TUV EN60950-1 BSMI CNS14336 CCC GB4943 J60950-1 approved
EMC Emission	Compliance to EN55022 class B EN61000-3-2 3 FCC PART 15 / CISPR22 class B CNS13438 class B GB17625.1
EMC Immunity	Compliance to EN61000-4-2 3 4 5 6 8 11 light industry level criteria A

Which Version Do You Need? Click here ▼

Which Version Do You Need?

Selecting the Optimal Version for Your Broadcast Requirements.

Choosing the correct version of your FM Transmitter is crucial for operational efficiency and meeting your specific broadcast goals. We offer professionally engineered systems that cover 90% of customer requirements right out of the box, ensuring you get the exact functionality needed for your station.

These are the two primary, professional versions of our FM Transmitters:

Transmitter Version	Ideal Application
◼ Stereo with RDS and Audio Processing Version	Any station prioritizing high audio quality, professional stereo separation, and dynamic Radio Data System (RDS) functionality for displaying station name, song titles, or slogans. This is the most feature-rich option for modern, professional broadcasting.
◼ MPX Version	Experienced engineers who handle external audio processing and stereo encoding outside the transmitter. This version accepts a pre-processed and encoded composite signal (MPX) for direct modulation, offering maximum control to the audio chain expert.

Need Customization?
We understand that custom requirements exist. If you need alternative versions (e.g., stereo only, no RDS, no processing), we can accommodate these requests to match your specific technical setup.

Contact Our Experts
If you are still unsure, you are always welcome to contact us at: info@aareff.com or WhatsApp: +1 829 6980733 and we're more than happy to advise you.

Stereo, RDS, and Advanced Audio Processing FM Transmitter Version

The Ideal Transmitter: Loud, Legal, and Hassle-Free

For Beginners: Features automatic audio level adjustment to ensure your 2000 watt transmitter always complies with state regulatory specifications. Effortless setup guaranteed.

For Professionals: Skip manual adjustments. This unit is housed in a single, integrated enclosure, providing everything needed for optimal performance without external clutter.

Smart Audio Processing & Regulatory Compliance

The built-in audio processing is engineered for maximum competitive advantage:

• It achieves a loud, impactful audio level while strictly preventing over-deviation and potential regulatory issues.

• The internal audio processors and stereo functionality are expertly calibrated to maintain the crucial balance between maximum loudness and legal compliance.

2kW FM Transmitter Stereo DDS with RDS and Audio Processing | AAREFF Stereo Audio and Processing

The audio inputs conform to the industry standard: 600 ohm +4 dBu balanced, using XLR connectors.

Additionally, this version INCLUDES RDS, allowing your station name and other information to scroll across car radio displays.

This is not just ordinary RDS; it features fully programmable dynamic RDS. By connecting the transmitter to a PC via USB, you can modify the RDS data in real-time using the USB PC CONTROL shown below.

Flat 30Hz to 76KHz MPX Input Version: Precision for High-End Audio Processors

Professional-Grade Raw MPX Input

This version is specifically available for experienced users who require a straight, raw MPX input for external signal processing.

1. Zero Tilt for Multiband Processors

• The absolute requirement for professional processing is a flat low-frequency response. As proven by our 160Hz Square Wave Test, our input delivers a perfectly square wave with zero tilting. This allows your external processor to maintain absolute control over the modulation, ensuring maximum loudness and a legal signal without low-end artifacts.

Prueba de inclinación MPX a 160 Hz con MPX Tool

2. Ultra-Stable Hartley VCO & Slow-PLL Architecture

Superior performance starts with a stable foundation. Our Hartley-based, lightly coupled push-pull VCO is so stable it stays within 10kHz of its frequency even with the PLL turned off. This inherent stability leads to two critical performance benefits:

• Ultra-Low Noise: Because the VCO is naturally stable, the PLL only needs to make microscopic corrections (less than 300Hz), resulting in an exceptionally clean and transparent noise floor.

• Preserved Low-End: By heavily low-pass filtering the PLL control voltage to just a few Hz, we ensure 30Hz bass notes pass through the varicap completely unaltered. This preserves the essential low-frequency response demanded by high-performance audio processors.

Result: This preserves the essential low-end audio response demanded by high-performance audio processors.

Antennas

The transmitter will work with any 50 ohm antenna rated at 2000W or higher. The following antennas when used with this 2kW transmitter will radiate (EIRP) the approximate power shown.

    • Vertical 5/8 Wave 5kW EIRP
    • Circular Dipole up to 10kW EIRP
    • Folded Dipole up to 25kW EIRP

Our 25kW EIRP system includes this transmitter packaged in with coaxial cable and a suitable antenna system. These full systems are engineered to comply with the EU standards and regulations for licensed broadcasting and most other countries regulations in the world.

Advanced Temperature Protection

Unlike compact models prone to rapid failure, our 2kW system uses two large amplifier enclosures to eliminate concentrated hot spots. This efficient heat dissipation effectively doubles the unit's lifespan.

Extreme Climate Safe: Active temperature monitoring automatically scales back power if ambient temperatures exceed +40°C, ensuring your equipment never overheats.

VSWR Protection

The final output stage of the 2kW transmitter utilizes twin BLP188XNRFE LDMOS amplifiers, specifically chosen for their extreme ruggedness. These XR (Extremely Rugged) devices are designed to withstand severe load mismatches at VSWRs greater than 65:1 at 5 dB of compression. For ultimate reliability, the system is engineered to remain stable and protected even under the most challenging antenna environments.

Construction

The Aareff 2kW system delivers maximum air-time reliability. Its modular design pairs two 1kW LDMOS amplifier blocks with a precision Wilkinson combiner, guaranteeing half-power broadcasting even during maintenance. Exceeding FCC and EU ETSI standards, it is the professional choice for high-fidelity regional FM coverage.

The complete assembly is made up of two 3U enclosures and one 2U enclosure in strong 16-gauge steel, powder coated and baked in satin black. This is military grade strength, not flimsy thin paneling that eastern countries make. The whole thing tough with a durable surface that will never rust and will shine for years. The front panels are 19 inches so they will fit with ease into a standard rack.

Configuration

Plug-and-Play Setup

We ensure your FM Transmitter is ready for immediate use upon arrival.

To facilitate a true plug-and-play experience, we factory-test and pre-set the unit to your desired FM broadcast frequency. This means you can connect the transmitter and begin broadcasting straight out of the box after delivery.

Flexible On-Site Adjustmentsp

If your intended operating frequency changes, or if you don't specify it during the order, adjustments are quick and straightforward. The following parameters are easily user-adjustable in minutes via the underside panel controls:

    • Operating Frequency (FM Channel)

    • FM Deviation (Modulation depth)

    • Output Power Level (Fine-tuning the 1W output)

This design guarantees maximum flexibility and simple on-site configuration for any broadcasting requirement.More information on this in the User Manual, you can find a link to this below.

Compliance

The stereo version with audio processing and limiting meets all the regulatory standards required out of the box and pre configured. In fact if you send us a copy of your permit and it's conditions, we will set it up exactly to the specification. This equipment complies with EU/CE harmonised standards and FCC technical requirements for FM broadcasting. More information HERE

Do You Have A Question?

Web Based Audio, Control and Monitoring (OPTION)

Stay connected to your transmitter anywhere, anytime. With AAREFF’s web based remote control and monitoring option, you can monitor and manage critical performance data in real time without needing to travel to site.

Web Interface & Secure Login – access your transmitter from any browser
Real-Time Monitoring – forward/reflected power, VSWR, temperature, and supply voltage
Remote Control Functions – switch RF on/off, adjust power levels, change and fine tune the frequency
Flexible Connectivity – connect easily via LAN, VPN, or our secure web interface — designed to work even behind firewalls.

This feature not only gives engineers the tools they need, but also provides peace of mind for station managers by reducing downtime, lowering maintenance costs, and ensuring your broadcast runs smoothly 24/7.

THE INTERFACE SHOWN BELOW IS A REAL LIVE!! TRANSMITTER, ONLINE NOW, IN OUR WORKSHOP
> PRESS < the RED speaker icon, wait 4 secs and you will hear the real-time sound being fed to the transmitters audio input section. It will work on mobile, but it looks better on desktop as its designed to be on view in the studio computer.

What You See in the Remote Dashboard

The AAREFF remote control interface provides engineers with a complete overview of transmitter and system status in real time:

Connection & Device Info – online/offline status, LAN & external IP, device ID
System Performance – CPU load, processor type, disk usage, memory load, lock status
Operating Conditions – internal temperature, supply voltages, calibration states
Transmitter Parameters – frequency, forward power, VSWR, phase voltage, DDS/PLL control
Real-Time Alarms – instant alerts when parameters go out of range

From anywhere in the world, you can securely monitor, troubleshoot, and control your AAREFF / Veronica FM transmitter, ensuring maximum uptime and peace of mind.

Internal Microprocessor Logging

Every AAREFF / Veronica transmitter is supervised by an embedded microprocessor that continuously records system activity. The internal log provides engineers with precise, time-stamped updates of operating conditions and broadcast data.

Time-Stamped Events – detailed logs of all changes and updates
Operating State – PLL lock status, frequency, RF power output
Live Parameters – phase voltage, VCO levels, calibration values, DDS registers
Device Information – unique transmitter ID and system identifiers
Configuration Updates – records frequency adjustments and parameter changes
RDS Activity – logs text messages, program IDs (PI), PTY codes, and 57kHz carrier status
Diagnostic Data – low-level register outputs for troubleshooting

This level of transparency ensures engineers can track performance, confirm settings, and diagnose issues quickly whether on site or connected remotely.

Web-Based Control Panel

The AAREFF remote interface allows engineers to configure transmitter and RDS settings directly from any browser, providing complete flexibility and instant control.