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SFR-1 Sound module with Speed Controller

Beier SFR-1 Sound module with Speed Controller
Beier SFR-1 Sound module with Speed Controller
Beier SFR-1 Sound module with Speed Controller
Beier SFR-1 Sound module with Speed Controller

Beier SFR-1 Sound module with Speed Controller

  • Part Nr.: BEI-SFR-1
Ex Tax: €214.05
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Product description


Sound Speed Controller SFR-1

The SFR-1 at a glance:


  • Combination of sound module, speed controller and light control unit
  • Much easier connection and easier programming than with separately sound module and speed controller
  • Suitable for all types of RC models with one motor and a commercial remote control
  • Individually programmable and suitable for all model types
  • For brushed and bell-armature DC motors
  • Supply voltage: 6 - 18 V
  • Max. motor current: 30 A
  • Powerful BEC with 5,6 V, 3 A
  • Inclusive 700 sound files for speed dependent motor, additional and random sounds
  • Use of own recordings and songs possible
  • Powerful built-in amplifier for optimal sound quality
  • 6 proportional inputs to control sound, speed controller, light and servo functions
  • Up to 16 channels via the sum signals S-Bus / SUMD
  • 16 switching outputs for LEDs, lamps, smoke generators, relays, etc.
  • Free programmable light and sound sequences
  • 2 programmable servo outputs to control additional movements and mini speed controller
  • Adjustable speed control functions: load regulation, cruise control, mass and steering inertia and different brake functions



The SFR-1 is a multifunctional module and combines the sound module USM-RC-2 and the 
speed controller UFR-1230 in one unit. It comes with a large light control unit, three servo outputs and an infrared port for thelight module SM-IR-16-2, to transmit light signals to a trailer. 

The SFR-1 is suitable for all types of RC standard transmitter. With the various setting options the SFR-1 can be easily adjusted to all model requirements and driving behaviours. For an easy start we have more than 140 ready to use sound projects and 700 sound files for various model types. Of course, own recordings can be used, as well. 

Additional information can be found in the SFR-1 operating manual (PDF).

You can find answers to frequently asked question in our forum under FAQ .

To test our software "SFR-1 Sound-Teacher" you can download a demo version

Technical data


Supply voltage (Ub): 6 – 18 V DC
Power consumption: Quiescent current: approx. 1 mA
Standby current (sound, motor and outputs off): approx. 80 mA
Motor current: max. 30 A continuous current, 60 A short time (1 minute)
BEC voltage: 5,6 V
BEC current: max. 3 A continuous current, 5 A short time (10 seconds)
Proportional inputs: 6 channels (1,000 - 2,000 ms)
Supported protocols:
  • PPM / PCM (1,000 - 2,000 ms)
  • Sum signal S-Bus (max. 16 channels)
  • Sum signal SUMD (max. 16 channels)
  • Nautic / Multiswitch / Multikanal / EMS
Servo outputs: 3 outputs (1,000 - 2,000 ms)
  • Servo output for steering
  • Servo output 1
  • Servo output 2
Switching outputs: 16 outputs (npn – open collector), max. 1,5 A per output, the total current of all outputs is not allowed to exceed 3,0A
NF amplifier: 20 W
Loudspeaker: 4 - 8 Ohm
Volume setting: With extra poti (100 kOhm) and/or by the radio
Memory for sound files: Micro-SD-card (1 bis 32 GB)
May. length of sound: approx. 180 minutes per1 GB
Supported sound files: WAV-format, 8/16 Bit, Mono/Stereo, 22/44 kHz
Sound output: 16 Bit, Mono, 44 kHz
Number of possible sounds:
  • 5 running steps/gears (internally in up to 255 steps accelerated)
  • 8 change sounds between the running steps/gears
  • Turn on noise, turn off noise, starting noise, stopping noise, idling noise, brake noise, reverse engine noise, curve squeal, flashing lights sound
  • 30 additional sounds (for example via prop.-channels)
  • 8 random sounds (random generator)
  • 30 tracks for WAV-Player
Random sound generator: Times between 1 to 999s adjustable
Additional ports:
  • Programming interface for data cable
  • Port for infrared diode of light module SM-IR-16-2
Protection features:
  • Short circuit protection at motor output stage
  • Short circuit protection at switching outputs
  • Short circuit protection at BEC
  • Temperature monitoring
  • Battery voltage monitoring
  • Protection while switching on power supply
  • Failsafe for proportional inputs
Cables for connection:
  • For battery: 2 x 1,5 mm², length approx. 15 cm (with Deans T female connector)
  • For Motor: 2 x 1,5 mm², length approx. 15 cm
  • For receiver: servo patch 3 x 0,14 mm², length approx. 30 cm
Permissible ambient temperature: 0 – 60° C
Permissible relative air humidity: Max. 85 %
Size: 80 x 47 x 23 mm
Weight: 86 g

Included in delivery:

  • Soundfahrtregler SFR-1
  • 2 servo patch cable (30 cm) to connect RC-receiver
  • 1 cable (25 cm) for loudspeaker
  • 1 cable (25 cm) for standby swith or volume potentiometer
  • 1 Flat ribbon cable (40 cm) to connect switching outputs
  • Micro-SD-card (4 GB) + adapter
  • Software included on SD Card


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