Sound Devices A20-Nexus Receiver

14,995.00 USD

Sound Devices A20-Nexus — wideband half-rack receiver expandable from 8 channels up to 16 channels with software licenses.



Special considerations may apply if this item is received outside of North America. Please read for details.

Sound Devices A20-Nexus Receiver

The Sound Devices A20-Nexus is a wideband half-rack receiver expandable from 8 channels up to 16 channels with software licenses. The A20-Nexus 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.

Upgrade to 12 or 16 receiver channels with the A20-Nexus 4-Channel Expansion License.

A20-Nexus 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 software license (coming soon).
• 470 MHz – 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 – 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


SpectraBand technology delivers a tuning range of 470 – 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.


The A20-Nexus v1.20 firmware adds the AutoAssign function, which automatically scans the current tuning band for clean frequencies, assigns them to multiple channels, and then automatically pushes them to NexLinked transmitters. Deploy multiple transmitters in seconds.

The updated A20-Nexus v1.20 firmware also adds the ability to globally power on and off all transmitters from the TX list. Firmware updates available from Sound Devices website.

Network away

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).

Real time spectrum analysis

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.

Go cableless

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.

Long range

The A20-Nexus and A20-Mini deliver 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.

Whats in the Box?

• 2 x A20-Monarch SpectraBand antennas
• 2 x Articulating arm with clamp and 1⁄4-20 thread mount
• 2 x 30in/75cm BNC – BNC cable
• 2 x 2.4GHz SMA Tilting antenna
2 x NexLink side mounting brackets with SMA to SMA cable


A20-Nexus Specifications



· 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


· Proprietary, 100% digital RF modulation

· Standard or Long Range, selectable per channel

Spurious Rejection

· >100 dB typical

Cascade output

· 50 ohm

· 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.

· Wideband power split, pre-LNA

RF Bias output

· 12V, 200 mA each BNC

· Smart antenna support, Wisycom-compatible




· 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

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 cm x 20.3 cm x 16.7 cm

· (1.6 in x 8.0 in 6.6 in)


· 1.27 kg (unpackaged)

· 2.8 lbs (unpackaged)

Specifications are subject to change without prior notice. For the latest information available on all Sound Devices products, visit

Patents: The A20-Nexus is protected by US patents US10678294B2, US20190166523A1, International patent WO2018022209A1, and several patents pending.