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Sound Devices A20-Nexus 8-16 channel true diversity half-rack SpectraBand + VHF receiver, 169-1525 MHz
€ 18,143.95 Our Price € 14,995.00 Our Price

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 16 channels with software licenses 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.


SpectraBand technology delivers a tuning range of 470 to 1525 MHz in a single unit, an industry first. Experience ultimate flexibility as you find open spectrum away from the crowded UHF TV band. The included A20-Monarch antennas can receive the entire 470-1525 MHz range, keeping your kit small and tidy.


Control your A20-Mini transmitter using the built-in long range remote control link. NexLink's advanced long distance modulation reaches even farther than the A20-Mini's long-range audio transmission.


You've got options. Configure your A20-Nexus for Dante audio, use the built-in web server to control the receiver using the web browser on any computer, tablet, or phone, and even power the A20-Nexus remotely using Power-over-Ethernet (PoE).


The days of waiting for a frequency scan to complete are over. Instantly visualize the fluctuating RF spectrum around you in real time, while running all channels of the audio.


With the A20-Mini's GainForward Architecture, easily set the Mini's gain, low-cut, and limiter directly on your A20-Nexus or mixer-recorder. This immediate, local control of gain means never having to adjust the gain on the transmitter again.


Thanks to its half-rack size, the A20-Nexus is equally at home in a rack, in a bag, or docked to an 8-Series mixer recorder for a cableless kit.


The A20-Nexus and A20-Mini deliver the longest transmission distance of any system on the market. The state-of-the-art, 100% digital long-range modulation offers the same great audio quality (10 Hz to 20 kHz) as our Standard modulation scheme with a longer range for both line-of-sight and heavy multipath transmission.


The A20-Nexus joins the growing lineup of Sound Devices Astral wireless products. With industry-leading features like SpectraBand, GainForward, NexLink, long range modulation, real time spectrum analysis, and more, the Astral Series pushes the bounds of wireless audio.


  • 8-channel ultra-high-performance, true-diversity receivers in a ½ rack size
  • expandable to 12or 16-channels via software license
  • 470 MHz to 1525 MHz tuning range via SpectraBand Technology
  • NexLink: integrated, long distance remote control of all wireless transmitters
  • 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
  • 16 channels of Dante audio-over-IP output to DB25 connectors on the back panel
  • 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
  • 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 to 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


  • 2x A20-Monarch omni-directional SpectraBand antennas
  • 2x articulating arm with clamp and 1/4''-20 thread mount
  • 2x 75cm BNC/BNC cable
  • 2x 2.4GHz SMA tilting antenna
  • 2x NexLink side mounting brackets with SMA to SMA cable


  • 470 to 1525 MHz tuning (1055 MHz switching bandwidth), 25 kHz steps
  • SpectraBand Technology for maximum rejection of out-of-band signals
  • available frequencies depend on country of operation
  • proprietary, 100% digital RF modulation
  • standard or long range, selectable per channel
  • spurious rejection: >100 dB typical
  • cascade antenna output: 50 ohm, wideband power split (pre-LNA), 3 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)
  • RF Bias output: 12V, 200 mA each BNC
  • Smart antenna support, Wisycom-compatible


  • latency standard modulation = 2 ms, analog or digital outputs
  • latency 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 +20 dBu for 0 dBFS, mic -20 dBu for 0 dBFS
  • digital audio output: AES3 balanced connection, 110 ohm output impedance


  • DC Input: dual, redundant
  • 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)


  • DC input, 10 to 18V in, 2A min
  • 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 x 20.3 x 16.7 cm
  • weight: 1.27 kg (unpackaged)

More Information
BrandSound Devices
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