Sound Devices A20-NEXUS



8, 12, 16-Channel True Diversity Wireless Receiver with SpectraBand Technology


Meet the half-rack receiver with an entire rack’s worth of features. The next-generation A20-Nexus is expandable from 8 channels up to 12 and 16 with additional software and features forward-thinking technologies like SpectraBand, the powerful NexLink remote-control link, real time spectrum analysis, and more. With multiple options for audio outputs, powering, and remote control, the A20-Nexus can seamlessly adapt to your workflow, both now and in the future.

What's Included:

• A20-Nexus

• 2 x A20-2.4G antenna + mounts

• 2 x A20-Monarch antenna

• 2 x adjustable clamp and articulating arms

• 2 x BNC cables


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  • Main Features:
  • 8-channel ultra-high-performance, true-diversity receivers in a ½ rack size (8.0” x 6.6” x 1.6”).
  • Expandable to 12 or 16 channels via A20-Nexus 4-Channel Expansion License. Licenses are $2500 USD, or $250 USD for a 7-day rental, or $850 USD for a 30-day rental.
  • 470 MHz – 1525 MHz tuning range via SpectraBand Technology.
  • NexLink: an advanced long-distance modulation that reaches even farther than the A20-Mini’s long-range wireless audio transmission and functions separately or alongside A20-Remote.
  • Dante audio-over-IP of RF receiver audio.
  • Flexible powering: via PoE+, DC input, 8-Series, or AC mains (with optional adapter).
  • Web App control from browser on any computer, smartphone or tablet.
  • Full remote operation capability: Power via PoE, audio via Dante, control via Web App.
  • Dual DB-25 connectors for 16 channels of mic, line, or AES outputs
  • Convert 16 channels of Dante to analog and/or AES on DB25 connectors, for sending IFB, voice-of-god, and more from mixer to set.
  • Wide, 6.2” color OLED array with touch for control and monitoring.
  • Integrated Real Time Spectrum Analyzer (RTSA) and scanning for intuitive frequency coordination.
  • Optical Fiber Network option via SFP slot. SFP accepts a wide variety of modular network transceivers.
  • A20-QuickDock allows docking and undocking in seconds from 8-Series mixer-recorders with no tools.
  • The AutoAssign function automatically scans the current tuning band for clean frequencies and assigns them to multiple channels. The clean frequencies are automatically pushed to NexLinked transmitters.
  • Modular design: RF section (A20-Nexus) can be disconnected and remoted from 8-Series, as opposed to less-flexible integrated RF/Mixer/Recorder solutions.
  • All NexLink control is handled by A20-Nexus and/or its Web App instead of the 8-Series for maximum flexibility.
  • Full remote power-down: A20-Minis can be fully powered down via NexLink for excellent battery life. This alleviates the need for remote auto-RF-Power adjustment schemes. User is in full control of RF power settings.
  • Supports GainForward Architecture: No gain setting on the A20-Mini transmitter. Adjust gain at the receiver or mixer.
  • 100% digital long-range modulation delivers the longest transmission distance of any system on the market.
  • Excellent audio quality, full 10 Hz – 20 kHz audio bandwidth.
  • RF SAW filters for excellent rejection of interference from nearby IFB or camera hop transmitters.
  • BNC timecode input for auto timecode sync of transmitters over NexLink
  • Specifications:
  • RF:
  • Tuning:
  • 470 to 1525 MHz (1055 MHz switching bandwidth)
  • 25 kHz steps
  • SpectraBand Technology for maximum rejection of out-of-band signals
  • Available frequencies depend on country of operation
  • Modulation:
  • Proprietary, 100% digital RF modulation
  • Standard or Long Range, selectable per channel
  • Spurious Rejection:
  • >100 dB typical
  • Cascade output
  • 50 ohm
  • 3.5 dB Insertion Loss from front BNC through rear BNC: It is recommended to use an external powered antenna to overcome the 3 dB splitting loss in the Nexus so that the receivers maintain excellent range.
  • Wideband power split, pre-LNA
  • RF Bias output:
  • 12V, 200 mA each BNC
  • Smart antenna support, Wisycom-compatible
  • AUDIO:
  • Latency:
  • Standard modulation = 2 ms, analog or digital outputs
  • Long Range modulation = 3.9 ms, analog or digital outputs
  • Audio Frequency Response:
  • 10 Hz–20 kHz, +/- 1 dB relative to 1 kHz
  • Dynamic Range:
  • > 130 dB with A20-Mini as transmitter
  • Output Level:
  • Line-level: +20 dBu for 0 dBFS
  • Mic-level: -20 dBu for 0 dBFS
  • Audio Output Sample Rate:
  • 44.1, 48, or 96 kHz
  • Digital Audio Output:
  • AES3 balanced connection, 110 ohm output impedance
  • Audio-Over-IP:
  • Dante, 44.1 or 48 kHz sample rate
  • Dante Audio-Over-IP:
  • 16 input/output channels
  • Control:
  • Web-based control and monitoring of all Nexus settings
  • Connections:
  • 2x RJ45 ports: For Dante and/or Control. Port 1 supports powering from PoE+
  • 1x SFP: For Dante and/or Control. Compatible with Small Form-factor Pluggable (SFP) network transceivers
  • Sources:
  • DC Input: dual, redundant (highest voltage takes precedence)
  • PoE+: 802.3at, 30W needed (standard 15W PoE 802.3af will not work)
  • 8-Series (through unit-to-unit connector when docked)
  • AC mains adapter (sold separately)
  • Levels:
  • DC input, 10 to 18V in, 3A minimum at 6.5 VDC
  • 11 W idle, default configuration
  • Extra power passed through for USB power, active antenna power, and DC output power
  • USB-A: 5V, 500 mA output; supports keyboards, thumb drives, A20-Mini transmitters, and USB hubs
  • Operating Temperature Range:
  • -10 °C to +55 °C
  • Dimensions (H x W x D):
  • 4.0 cm x 20.3 cm x 16.7 cm
  • (1.6 in x 8.0 in 6.6 in)
  • Weight:
  • 1.27 kg (unpackaged)
  • 2.8 lbs (unpackaged)