Sound Devices A20 Mini - Digital Wireless Transmitter

DKK 17.250,00
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Digital Wireless Transmitter

Sound Devices’ first miniature transmitter incorporates state-of-the-art features such as full remote control via the A20-Remote app, GainForward Architecture, internal 32-bit float recording, a worldwide tuning range of 470 MHz – 694 MHz, and more. The A20-Mini is fully compatible with Sound Devices’ existing A10 Digital Wireless System.


  • Full remote control of the Mini via A20-Remote companion app. Control frequency and RF power, turn the Mini on and off, start and stop recording, mute the microphone, format the media, view the status of all your Minis, and more.
  • Create a custom group or use the all transmitters group to change settings on multiple A20-Minis at once.
  • State-of-the-art 100% digital long-range modulation delivers the longest transmission distance of any system on the market.
  • GainForward Architecture: set the Mini’s gain levels via trim control (with an 8-Series) or at the A10-RX (other mixers).
  • Full 10 Hz – 20 kHz audio bandwidth; 100% digital RF modulation and transmission. Same excellent range and audio quality as the A10-TX.
  • Worldwide tuning range of 470 MHz – 694 MHz.
  • Built-in 32-bit float, 48 kHz recorder with 64 GB storage for over 80 hours of record time.
  • Offload recorded WAV files via USB-C and optionally conform/convert with SD-Utility.
  • Powering via AAA or NP-BX1 (Li-Ion) with built-in charging for NP-BX1 Li-Ion battery.
  • Internal supercapacitor-powered timecode generator can be jammed via USB-C.
  • Water-resistant with a rounded form factor.


The A20-Mini digital wireless transmitter combines legendary British audio quality with the best of American design. The sleek, rounded form fits perfectly into body contours and underneath tight clothing.

…and control.

Control the A20-Mini from your phone or tablet via Bluetooth 5.2 with companion app A20-Remote. Set frequency and RF power, turn the Mini on and off, start and stop recording, mute the microphone, format the media, view the status of all your Minis, and more. The A20-Mini’s high-efficiency internal 2.4 GHz antenna ensures excellent Bluetooth range.

Longest range.

With v5.00 firmware, the A10/A20 Wireless System delivers the longest transmission distance of any system on the market.¹ The state-of-the-art, 100% digital long-range modulation offers the same great audio quality (10 Hz – 20 kHz) as our Standard modulation scheme with a longer range for both line-of-sight and heavy multipath transmission.

Powerful group controls.

All transmitters can be powered up and down simultaneously or made to start and stop recording with a single tap from your smartphone or tablet. Use A20-Remote to create custom groups with selected transmitters or use an automatically-created all-transmitter group. You can also use groups to change RF Power, Mode, Modulation, Mute Mic, Format Media, and LED settings on multiple A20-Minis at once.


With the Mini’s GainForward Architecture, easily set the Mini’s gain, low-cut, and limiter directly on your 8-Series. This immediate, local control of gain allows quick adaptation to changing volume levels and saves time during production.

32-bit float recording.

The A20-Mini records in 32-bit float for an astounding >130 dB of dynamic range. This allows for audio gain decisions to be made after recording, with zero loss in headroom or noise performance.

Built-in 64 GB media.

No more SD card management – the ample-sized media stores more than 80 hours of continuous, uncompressed 32-bit float recording. Simply offload the recorded WAV files via the high-speed USB-C port to a computer.

Never lose time.

The Mini’s ultra-accurate 0.2 ppm internal timecode generator can be jammed via USB-C with negligible drift over a 24-hour period.

Flexible, worldwide operation.

With a built-in 470 MHz to 694 MHz UHF tuning range, your Mini can go wherever work takes you.

Power away.

Use off-the-shelf rechargeable or AAA batteries – no adapter needed. 3 AAA batteries or a rechargeable Sony NP-BX1 give you the ultimate in powering flexibility. You can even recharge the NP-BX1 via the Mini’s USB-C.


With its extensive gasketing and waterproof connectors, the A20-Mini can easily withstand water and sweat.


Optional accessory provides easy battery charging, file transfer, and timecode jamming of up to eight A20-Minis at a time. Powered via DC (TA4) or USB-C (USB-PD).

¹ When comparing systems with same transmit power, same antennas, and same transmission frequency.

Whats Included:

  • 1x Sound Devices A20 Mini - Digital Wireless Transmitter

Frequency Range

  • 470 to 694 MHz
  • Transmitters are tunable in 25 kHz steps
  • Available frequencies are dependent on region

RF Output Power

  • Off, Low – 2 mW, Normal – 10 mW, High – 20 mW, Max – 40 mW, selectable

Modulation Mode

  • Proprietary digital RF modulationStandard or Long Range, selectable


  • UHF RF: SMA connector, removable
  • 2.4 GHz built-in

Audio Frequency Response

  • 10 Hz – 20 kHz, +/- 1 dB re 1 kHz

Audio Input Type

  • Lavalier Microphone via 3-pin LEMO
  • Pin-1 ground
  • Pin-2 5 V bias
  • Pin-3 audio/bias (8k ohm to 5 V)

Bias Power

  • 5 V
  • Input Impedance
  • 8k ohms

Input Clipping Level

  • +5 dBu

Dynamic range

-130 dB min (A-weighted)

Menu and Controls

  • Power & Pair button protected inside battery compartment
  • A20-Remote, mobile device application of iOS, iPad, and Android

Remote Control

  • A20-Remote Android, iOS, and iPad app via Bluetooth 5.2 LE

Recording Media

  • Internal 64 GB
  • 10% over-provisioned for optimum performance

Recording File Format

  • 32 Bit Float, 48 kHz, Monophonic
  • Broadcast WAV (<4 GB), RF64 WAV (>4 GB)
  • Simultaneous Record and Transmit mode is not available on A20-Mini units sold or operated in the United States of America.

Timecode (LTC)

  • Input via XL-TC-USBC-LEMO or XL-TC-USBC-BNC: 0.3 V – 3 V p-p (–17 dBu to +3 dBu), 20k ohm impedance
  • Output via XL-TC-USBC-LEMO: 3 V p-p, 400 ohm impedance

Timecode Clock

  • 0.2 ppm accuracy
  • Holds accurate clock for four hours while powered down with batteries inserted, holds for one hour without batteries via internal supercap
  • Auto Jams timecode from LTC source via USB-C connector, or from optional PowerStation-8M

Timecode Frame Rates

  • 23.98, 24, 25, 29.97 DF, 29.97 ND, 30 DF, 30 ND
  • Frame rates are auto-detected from incoming source


  • Mass Storage (USB-C): USB 2.0 high speed for file transfer
  • Powers A20-Mini


  • 3x AAA batteries (Energizer Ultimate AAA Lithium primary batteries recommended), or Sony NP-BX1 rechargeable Li-Ion
  • Built-in Li-Ion charger via USB-C (7.5 W or more needed)
  • Sony NP-BX1 is rechargeable via optional PowerStation-8M.


  • Water Resistant
  • Operating: -20° C to 60° C, 0 to 90% relative humidity (non-condensing)
  • Storage: -40° C to 85° C

Dimensions (H x W x D)

  • 75.8 mm x 48 mm x 19 mm
  • 2.98 in x 1.88 in x 0.74 in


  • 51 g (without batteries)
  • 1.8 oz (without batteries)