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2kW Professional FM Radio Transmitter

2kW Professional FM Radio Transmitter. Overview
5 Years! Warranty

Inc. Delivery to UNITED STATES

Fully modular 1 kW + 1 kW for maximum reliability and flexibility. For the maximum power of 2kW both amplifiers run simultaneously, if you want to service or clean one of the amplifiers, the remaining one will stay on air keeping the listeners and advertisers happy using half power. This modular 2kW transmitter comes complete with exciter, Wilkinson splitter and high powered combiner. Standard 19 inch heavy steel black powered coated enclosures built to last!!!.

Which Version Do You Need?

These are the two main versions of this transmitter:

◼ Stereo with RDS and Audio Processing Version

◼ MPX Version

These two versions cover 90% of all customer requirements. Other custom versions are available such as stereo only, no RDS, no processing etc. which we can also make if that's what you require.

You will find these two main versions shown in detail in the two following sections with descriptions of what they do and how they work. You should also see the price, INCLUDING delivery, to your country.

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

Stereo, RDS and Audio Processing Version

US$ 6228

If you are not sure which version you want, then you definitely need this version. It is perfect for beginners because it adjusts the audio levels automatically and keeps the 2000 watt transmitter within the legal specifications required by the state regulator.

This version is also ideal for professionals who just don't need the all the hassle. This is because it includes everything in one enclosure. The audio processing keeps the audio level 'LOUD', but not too loud whereby it causes over deviation and contravenes your permit. The trick is to get the sound as loud as possible so you can compete with the other stations on the dial, but at the same time keeping your signal legal. This is a tricky balance to maintain, but this version in stereo with our internal audio processers does exactly this.

2kW Professional FM Radio Transmitter Stereo Audio and Processing

In addition, this version INCLUDES RDS. This allows everybody to see your station name and more scrolling across the car radio display.

The RDS is not just ordinary RDS, it is fully programmable dynamic RDS. This means the transmitter can be connected to a PC by a USB cable. The transmitters RDS circuit will pick the Artist and Song name from any folder on the PC disk drive. This folder is easy to set up in the DJ playout software, like Zara Studio etc. You can find more information about this in the Aareff RDS User Manual.

MPX Input

Stock Code: 2000wpll19p. Email or WS for the price

We have this version available for Users with experience that prefer straight raw MPX input.

Low frequency audio response is the holy grail for multiband audio processors, they need it.

As you can see from the image, the 160Hz square wave is very square with no tilting making it perfect for use with Orban, Inovonics, Omnia, Stereo Tool and other commercial audio processors.

2kW Professional FM Radio Transmitter MPX 160Hz Tilt Test with MPX Tool


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.

Temperature Protection

The 2kW transmitter package uses two large amplifiers enclosures which spread the waste heat over a larger area. Spreading the heat this way improves long term reliability over compact type models simply because there are no concentrated hot spots which always lead to faster failure. This generally doubles the lifetime reliability over the equivalent compact type model. In addition to this there is active temperature monitoring which in worse case scenario will reduce the power automatically to protect the unit if the ambient temperature is extreme at over +40C.

VSWR Protection

The final output section of the 2kW transmitter is two RF amplifiers using two BLF188XR, the XR means 'eXtremely Rugged' These LDMOS RF power transistors are designed for the most challenging engineering environments and withstand severe load mismatches at VSWRs greater than 65:1 at 5 dB of compression. Two BLF188XR's can actually provide a combined CW output of 3200 W whilst still passing extreme ruggedness testing. For ultra reliability we just keep the output at 2kW total maximum. It can be set at lower power levels, right down to 20W if required.


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.

Frequency, Power and Deviation

The frequency and power level is easy to change, but not so easy that somebody with no experience can just press a button on the front, that would be too easy and dangerous. We reached a compromise with this, we placed these controls on the underside of the unit. To get to them, just slide the unit out of the rack, flip it over and the little dip switches will allow you to change the frequency and a trim pots for the power and deviation level.


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

User Manual

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 Phono/ RCA type unbalanced sockets
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 0.2% THD Max 0.2% THD Max (at MPX section)

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


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