Beier Double Sound Speed Controller SFR-1-HL for Heng Long Taigen Torro Tanks



The SFR-1-HL at a glance:

  • Control unit for tanks from Torro / Taigen and Heng Long (up to 4th generation)
  • Combination of double speed controller, sound module and light control unit
  • All plugs are compatible with the tank wires
  • Supply voltage: 6 - 18 V / Max. motor current: 2 x 10 A
  • Integrated BEC with 5,0 V and 1 A
  • Compatible with standard RC receiver / transmitter
  • Sum signals S-Bus / SUMD / i-Bus available
  • Speed controller functions: load regulation, mass and steering inertia and different brake functions
  • Light unit with 8 switching outputs for LEDs, lamps, relays, etc.
  • 2 mini speed controller for auxiliary drives
  • 2 servo outputs to control additional movements
  • Outputs for smoke generator, BB gun and IR battle unit


The SFR-1-HL is a multifunction all-rounder module, designed for the tanks of Torro / Taigen and Heng Long (up to 4th generation). The module replaces the (simple) original control unit for a much better sound and driving behaviour.

All connectors are compatible with the tank wires. One exception is the 4th generation the Heng Long RX-18. This generation requires an adapter plug to control the turret.

Thanks to various setting options the SFR-1-HL can be easily adjusted to all model requirements and driving behaviors. For an easy start we have more than 30 ready to use sound projects for different types of tanks. Own recordings can also be used.

The Software Sound-Teacher SFR-1-HL is only for Windows,
with an emulator like WineBottler is is also possible to use the Sound-Teacher with a Mac or other operating systems.

To control the tank, a "standard" RC remote control with a "standard" RC receiver is required for the SFR-1-HL. The tank's original transmitter cannot be used in combination with the SFR-1-HL! It is also possible to control the tank with the Android app SFR-1 Controller and the Bluetooth module BTC-1.

Compatibility with tanks

Producer Control unit version Control unit Compatibility Necessary adapter
Torro / Taigen all control units

no problem
Heng Long 1st - 3rd generation

no problem
4th generation

with adapter
for turret steering

SFR-1-HL adapter plug
6th generation

not working

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

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

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

Technical data

Supply voltage (Ub): 6 – 12 V DC
Power consumption: Standby current (sound, motor and outputs off): approx. 80 mA
Motor current M1 + M2: max. 10 A continuous current, 15 A short time (30 seconds)
Motor current M3 + M4: max. 1 A continuous current, 2 A short time (10 seconds)
BEC voltage: 5,0 V
BEC current: max. 1 A continuous current
Proportional inputs: 8 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)
  • Sum signal i-Bus (max. 16 channels)
  • Nautic / Multiswitch / Multikanal / EMS
Servo outputs: 2 outputs (1,000 - 2,000 ms)
Output for smoke generator: max. 3 A
Output for BB gun: max. 3 A
Switching outputs: 8 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 HL (10 kOhm) and/or by the radio/app
Memory for sound files: Micro-SD-card (1 to 32 GB)
May. length of sound: approx. 180 minutes per 1 GB
Supported sound files: WAV-format, 8/16 Bit, Mono/Stereo, 22/44 kHz
Sound output: 16 Bit, Mono, 22/44 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 999 s adjustable
Additional ports:
  • Programming interface for data cable
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
Permissible ambient temperature: 0 – 60° C
Permissible relative air humidity: Max. 85 %
Size: 65 x 56 x 16 mm (with SD card: 68 x 56 x 16 mm)
Weight: 33 g

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