SOUND DEVICES A20-Mini

Sound Devices A20-Mini — Ultra-Compact Digital SpectraBand Bodypack Transmitter

The A20-Mini is the smallest digital wireless transmitter in the Astral family — engineered for talent comfort and discreet placement. With 100% digital RF modulation, an internal 32-bit float recorder, and SpectraBand technology covering 470-1525 MHz, the A20-Mini delivers Audio Ltd's renowned uncompressed audio quality in a chassis that disappears under wardrobe.

Compatible with A10-RX, ASTRAL ARX2 (A20-RX), ASTRAL ARX16 (A20-Nexus) and ASTRAL ARX8 (A20-Nexus Go) receivers.

Key Features

• Ultra-compact bodypack: 7.6 × 4.8 × 1.9 cm, just 51 g without batteries
• Wide UHF tuning: 470-1525 MHz via SpectraBand technology in 25 kHz steps
• 100% digital modulation — Standard or Long Range — uncompressed audio with industry-leading transmission distance
• RF output power: Off / 2 mW / 10 mW / 20 mW / 40 mW
• GainForward Architecture: full mic signal sent to receiver — adjust gain, low-cut, and limiter at the receiver or mixer
• Built-in 32-bit float, 48 kHz recorder with 64 GB internal memory (over 40 hours of recording)
• Full remote control via A20-Remote app (iOS/Android Bluetooth) and from ASTRAL ARX16/ARX8 via long-range NexLink
• Ultra-stable internal timecode: 0.2 ppm accuracy, auto-jam via NexLink or USB-C
• Robust Ultem + aluminum chassis: exceptional strength-to-weight, curved geometry for rigidity
• USB-C: file transfer, charging, pairing with ASTRAL ARX16/ARX8, timecode I/O
• Lemo 3-pin lavalier input: supports 2-wire and 3-wire lavs (e.g., Schoeps CMR), 5 V bias, 8k ohm impedance
• 130 dB dynamic range (A-weighted), +5 dBu max input
• Eco-friendly powering: 3× AAA (alkaline, lithium primary, NiMH) or Sony NP-BX1 Li-ion
• Optional A20-BatteryDoubler: extends runtime to up to 9 hours (vs 4.5 hours standard)

Specifications

• Frequency range: 470-1525 MHz, adjustable in 25 kHz steps (regional availability applies)
• RF output power: Off / 2 mW / 10 mW / 20 mW / 40 mW
• Modulation: Proprietary 100% digital — Standard (2 ms latency) or Long Range (3.9 ms latency)
• Antennas: Main UHF SMA, 2.4 GHz integrated for NexLink/Bluetooth
• Frequency response: 10 Hz to 20 kHz, ±1 dB at 1 kHz
• Audio input: Lemo 3-pin lavalier (2-wire or 3-wire compatible)
• Dynamic range: 130 dB (A-weighted)
• Max input level: +5 dBu
• Recording media: 64 GB internal (exFAT, 10% over-provisioned)
• Recording format: WAV 32-bit float mono (BWF, 4 GB max)
• Timecode: input via USB-C or wireless via NexLink — LTC 0.3-3 V p-p, 20 kΩ; output 3 V p-p, 400 Ω
• TC clock accuracy: 0.2 ppm — holds 4 hours powered off with batteries, 1 hour without
• Frame rates: 23.98, 24, 25, 29.97 DF, 29.97 ND, 30 DF, 30 ND (auto-detected)
• USB-C: mass storage (USB 2.0), Li-ion charging, ARX16/ARX8 pairing, TC I/O
• Powering: 3× AAA "1.5 V" or Sony NP-BX1 Li-ion; A20-BatteryDoubler optional
• Battery life: up to 4.5 hours (NP-BX1) or up to 9 hours with A20-BatteryDoubler
• Operating temp: -10°C to 38°C (storage -40°C to 85°C, 1-90% non-condensing humidity)
• Dimensions: 7.6 × 4.8 × 1.9 cm (standard door) / 7.6 × 4.8 × 2.7 cm (with A20-BatteryDoubler)
• Weight: 51 g (without batteries)

Note: The A20-Mini is lavalier-only and does not support balanced mic, line-level, or AES inputs — for those, use the A20-TX or A10-TX.

2-year warranty when registered at sounddevices.com.