Soundunits     Audioamplifiers     Speakers     FAQ’s

Discontinued products


All prices shown below include 19% European VAT.
This means export prices for customers outside the European Union are
off 19%!

1. Sound units

All offered digital sound units are reproducing original engine- and special sounds. The engine range covers starting, engine idle, reeving up the engine, acceleration, speed dependent engine sound, returning to idle state and engine shut down. Available special sounds are horns, flaps,  weapons, radio messages, depending on the kind of sound unit.

Up to two speed signals can be scanned directely at the receiver to determine the moving state of the model. This makes it ideal for tracked vehicles.
It can be used in combination with burshless or common DC motors.

To ensure maximum output power at large scale vehicles, a  external amplifier can be used. Different amplifiers covering a lorge power range are on stock.

Universal switching outputs can be used for starting sound depending actions, like flashing a LED, move a motor, ...

A fully dynamic and sound synchronous smoke generator  for exhaust simulation is also available.


The following control modes are possible:

A) Encoder
This rotary switch / push button combination must be connected at a spare proportional channel of your transmitter.
For mechanical installatioin already present extension places of your TX can be used usually. (Only two wholes are necessary)
The desired sound is selcted by one of the 12 rotary switch position and triggerd by the push button.
This allows a convenient, quick and direct sound selection.
In principal the encoder is a simple potentiometer with 12 fix positions.
Price: No longer available
Some programmable transmitters can emulate the encoder signal


B) Using a spare proportional channel of your radio
A common proportional channel, equipped with a 3-position switch at your TX can be used to control the soundunit.
The switch should have a neutral position and momentary contacts to both sides. Permanent switching is also possible, but in this case the switch must be centered manually after operation.

One of the two following control modes can be used:

Control mode “Indirect Soundselection”
The desired sound is selected by flicking the switch x-time up (according to the desired sound number).
The selected sound is triggered by flicking the switch down.
A already selected sound can be triggerd multiple times without a new selection (f.e. MG bursts).
This mode allows triggering all sounds and functions loaded at the unit.

Control mode “Direct Soundselection”
The desired sound is simply selected by flicking the switch up (sound1) or down (sound2)

C) Control mode “Autostart”
This mode does not need any control channel. Fist acceleration of the motor starts the engine. If it runs 20s idel, it is shut down automatically.
This control mode does NOT offer any special sounds(f.e. horn).

For installing the soundsystem in your model, common RC-modelling solder skills are necessary. The offered componets are parts of a soundsystem, created by the customer.
Please see the manuals for further descriptions.

We have an extraordinary sound collection of different vehicles which is constantly enlarged.
We specialized on modern and historical  tracked vehicles and aircrafts!
A list of all currently available sounds can be found in the
Download section.
Please see also the
Demo section.



Soundmodule TBS Mini V2

New features:
- 16x larger sound memory, enough for 28 Minuts of sound
- Powerful 3W digital amplifier on board
- 4OHm and 8Ohm speakers can be used
- Volume controller on board
- New connector for 3rd party amplifiers -> See manual !

- Dimmension is 3mm wider than the former TBS Mini V1
- Receiver supply must be in the range of 4V -
6V(max) !!!

Manual TBS Mini V2

Aditional features:

  • Fully customer programmabel, free of charge sofware at Downloads
  • Large FREE OF CHARGE sound libraries of original recordings (f.e. Corsair, ME109, Spitfire, Cessna, dif. Trucks)
  • Soundquality 22KHz
  • 16Mbit Soundmemory, enough for 93s of soundrecordings
  • Internal 1,2W amplifier at 8 Ohm speakers
  • External high power amplifiers available
    (f.e.. 2x40W at 2Ohm and 12V OR 50W at 8 Ohm and 50V supply)
  • Up to 6 electronic switching outputs
    - activated by sound (f.e. Muzzle flashing with MG sound) or independant operation
    - permanent, momentary or flashing mode adjustable
    - direction flashing
  • Externel smoke generator for exhaust simulation (see below). Not recommended for aircrafts !
  • Twodigital inputs for triggering sounds by a external signal
    (f.e. Screaming tires at touch down, triggered by a switch)
  • Twoservo signal outputs, f.e. for retractable landing gears
  • All connections done by plugs, no solderwork necessary
  • Receiver signals are used for speedinformation,  this allows brushless or DC Motor usage
  • All connections horizontally -> full isolation and protection by shrinked plastic tube possible
  • Fully assembeled in SMD technology (no heavy, vibration sensitive components)
  • All wires included
  • Very little dimensions and weight
  • USB or RS232 programing interface by external adaptor (optional)
  • Can be fully configured by free of charge PC software:
    - you can make your own soundcreation or using the original Benedini sounds
    -Firmware update, your unit can be updated by your own with the latest software
  • Plays two sounds simultaneously (engine plus a special sound) from TBS Flash Ver. on

Technical Datas:
Supplyrange:             4V –
max. 6V (from receiver)
Internal amplifier:      3W at 4 Ohm and 6V supply
Switching outputs:   Minus switching, max. 12V/0,5A each
Dimensions:              only 55 x
28 x 10mm  (3mm wider than the TBS Mini V1)
Weight:                    about 6g

The recommended standard sound system for aircraft consists of:
- Soundunit TBS Mini
- 1x35W external audio amplifier
- One or two R10S speakers (two are ideal)
- Audio Isolator in case the main flight battery is used for powering the amplifier
  (the additional current draw of the amplifier can be netglected in comparison to the motor current)


Prices TBS Mini:
Fully programed with your desired setting:           135 Euro
(due to enormous increased production cost the price of the TBS Mini must be adapted since 01/2022)


Programming cables: (only necessary fi you want to program the sound unit on your own)
- USB Programing cable:
   TBS Mini:                                                                                                     18 Euro
- Special servo Y-cable for connecting a second speed controller in tank models:         6,50 Euro
- Encoder (optional control device to be installed in the transmitter, see
above)          No longer available
- Smoke generator for LAND vehicles (NO aircrafts) -> see Smoke Section.

External amplifiers (details below):

(details below)



2. Audio Amplifiers

2x60W digital power amplifier, Version 2

Ideal amplifier for 12-24V powered large scale vehicles like tanks.
Small dimensions, low heating and VERY powerfull !
This amp. comes together with the “Audo-Isoloator” preventing any grounding problems.
-> see detailed descriptioin below.

This amp. can be combined also with the TBS5 sound unit. In this case the Audio-Isolator is not necessary.
(Illustration similar)

Datasheet                     Price: 79 Euro


1x35W digital power amplifier (standard amplifier for RC aircrafts)

This amplifier is the replacement of the 1x30W digital amplifier. The output power is enough to drive one or two R10S speakers at their capabilities.
It will be delivered 100% tested, cables are included.
(Illustration similar)

Hint: It is highly recommended to operate this amplifier at max. 5S LiPo supply !


1x35W amplifier datsheet         Price: 33 Euro


2x10W digital audio amplifier

Ultra compact 2x10W digital amplifier for vehicles.
High efficiency and nearly no heating results in astonishing volume.
Ideal in combination with the TBS Mini V2 soundunit.

Supply voltage:  7,4 - 15V (2-4S LiPo or 12V Battery. NOT suitable for 7,2V NC battery packs!
Dimension:         about 40 x 30 x 7 mm
Weight:              about 15g


2x10W Manual (PDF)             Price: 29€


Audio Isolator

This device ensures a electrical / galvanic isolation between the receiver and main battery. It is simply plugged between the soundunit and the external amplifier and separates the two power sources properly.
It is highly recommended if already a ESC with opto isolator input for the speed signal is used.

It prevents any “ground loops” or noise feed into the receiver supply by the ESC for example. This may happen through devices beeing connected to the receiver AND to the main battery (f.e. by sound units having a internal power amplifier or ESCs without a “opto input”).
Such devices connect minus of the receiver to minus of the main battery!
The “ground mess” gets even worse, if multiple external amplifiers are connected to a sound system directly.
If a soundunit is powered by a separate battery, NO Audio-Isolator is necessary.

In addition, the device allows powering an amplifier by a main battery having more than 6S (see manual).

The audio isolator MUST be plugged at the SPEAKER connector of the TBS Mini V2! NOT the amplifier connector.

Audio-Isolator manual                   Price: 19,50 Euro


3. Speaker

A: Traditional cone speakers:

Standard speaker for airplanes: Visaton R10S.
Good power/weight ratio at highest efficiency and low price

Power:         30W music
Impedance:   4 and 8 Ohm available
Dimension:     100 x 100 x 36mm
Weight:        160g .
Sound pres.:   90dB (1W/1M)
Pice:            12 Euro




Speaker for limited space Monacor SPX-21M
Best power/weight radio, very small at good efficiency

Power:           25W music
Impedance:     4 Ohm
Dimension:     50 x 50 x 34mm
Weight:          90g
Sound pres.:   84dB (1W/1M)
Pice:              No longer on stock! Please order externally




Different Visaton brand speakers are on stock.
We will recommend the most suitable one for your application.

For aircraft applications the following speakers are recommended, in combination with the 1x40W amplifier:
2 pcs R10S (Ideal setup for airplanes)   or 2 pcs SPX-21M (at limited space in the model)

A very good alternative for foam models is using an Exciter (-> see below)


B: Exciter or Transducer “speaker”:
This kind of “speaker” is reduced to the drive/motor of a conventional speaker. It is installed on any surface which acts as the membrane, producing the sound. How it will sound, depends on many factors.
F.e. mechanical siffness of the material, its shape and density.

Please note that the whole structure (f.e. hull of of plane) can vibrate heavily, according to the set volume!
All installed items are exposed to it.
Up to now NO vibration damages are reported.
Exciters were already used also in wood and GFK models sucessfully.

We tried to find out which speaker technology is the best. For this, we did a test series, using different exciters and conventional speakers on different objects.
The result can be found

This is the recommended installation guide for a exciter.


 Two examples of exciters

Manufacturer documents, explaining this speaker principal can be found here:


Recommended exciter:
DAEX25FHE-4 (24W/4Ohm, Ф58 x 21mm, 110g)

No longer on stock, please source on your own.



4. FAQ’s

Under construction

5. Discontinued products

1x30W digital power amplifier




1x30W amplifier datsheet