Connecting Lavalier Microphones to A20-Mini
Connect a 2- or 3-wire lavalier microphone to the A20-Mini transmitter’s 3-Pin LEMO connector. Lock the connection by turning
clockwise until the connector is firmly attached to the A20-Mini.
The AC-BALXLR-4 3-pin LEMO to XLR female cable is not compatible with the A20-Mini as it does not have a balanced-input
mode/microphone preamplifier.
Source Type
A10-TX
A20-Min
i
2-wire lav
Yes
Yes
3-wire lav
--
Yes
Balanced mic XLR Yes
--
Balanced line XLR Yes
--
Auto-power-on w/
lav
--
Yes
Tuning A20-Mini and the Receiver
RF signals transmitted by the A20-Mini transmitter are received by the Sound Devices A20-RX and Audio Ltd A10-RX. Set the same
modulation and frequency on the transmitter and receiver. See the A20-RX and A10-RX User Guides for more details.
GainForward
The A20-Mini transmitter introduces GainForward, a new feature that eliminates the need to adjust microphone preamplifier gain at
the wireless transmitter. Audio levels from the transmitter are controlled either directly at the mixer’s trim control or at the wireless
receiver. If the talent speaks too softly or emotes too loudly after being “wired” with the transmitter, simply adjust the transmitter gain
with the mixer’s gain trim. Read more about GainForward at:
https://www.sounddevices.com/gainforward-explained/
Adjusting Audio of the A20-Mini Signal from the Receiver
From the A20-RX or A10-RX home screen, press the channel’s arrow button twice to enter the Input menu. From the Input menu,
press the middle button to select a sub-menu to adjust gain, low cut, or limiter of the incoming A20-Mini transmitted signal.
Gain is adjustable from 0 to 60 dB. Low cut can be set to Off, 40 Hz, 60 Hz, 80 Hz, 100 Hz, or 200 Hz. Limiter can be turned on or
off. The information menu displays the status of the tuned A20-Mini. See the A20-RX or A10-RX User Guides for more details.
Adjusting Audio of the A20-Mini Signal from the 8-Series or 688
When the A10-RX receiving A20-Mini signal is slotted into the SL-2 or SL-6, the A20-RX or A10-RX Input menu settings are
bypassed and all gain, low cut, and limiter activity are performed and controlled by the 688, 833, 888, or Scorpio. See the
Mixer-Recorder User Guides for more information.
Recording WAV Files
The A20-Mini records 32-bit float Broadcast WAV (under 4 GB) or RF64 WAV (over 4 GB) files at 48 kHz sampling rates. 32-bit float
files are recorded such that gain decisions can be made after recording. Because of the high dynamic range of the A20-Mini audio
levels are never too high or too low. Learn more about 32-bit float at:
https://www.sounddevices.com/a20-mini-32-bit-float-recording
A20-Mini recordings are started and stopped using the record and stop buttons in the A20-Remote Transmitter View.
The file name format is
transmitter name-YYMMDDHHMMSS.WAV.
A20-Mini
User Guide
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