The Sonos Amp Multi is a professional 8-channel multi-zone amplifier designed for premium whole-home audio and custom-installed sound systems. Delivering 125W per channel at 8 ohms across eight independently configurable outputs, it can power up to four audio zones with flexible stereo or mono operation. Advanced GaN Class-D amplification with PFFB technology provides efficient, high-quality performance, while ProTune offers per-channel EQ, gain and delay adjustment for precise room optimisation. With Wi-Fi 6, Ethernet, Apple AirPlay 2, RCA inputs, subwoofer connectivity and seamless control through the Sonos app, Amp Multi provides a powerful foundation for sophisticated residential audio installations.
Description
Sonos Amp Multi
World-class audio, amplified
Precision-built for professionals
Backed by thousands of hours of research and engineering, Amp Multi was built from the ground up to streamline professional installation at every stage. It’s designed to support your workflows and help you deliver bespoke audio experiences with precision and efficiency.
Multi-zone flexibility
Each output can be assigned to any zone, giving you complete flexibility in system design. Users can easily change audio sources and content, ensuring a seamless, consistent experience.
Innovation from the inside and out
Advanced GaN technology, Class D amplification, and post-filter feedback (PFFB) deliver exceptional audio quality with high efficiency. Its textured, thermally-optimised chassis enhances performance and durability all within a compact design built for the rack.
Easy app control
Control everything from Sonos app-zones, sources, output assignments, and status monitoring-all in one place
Intelligent indicators
Speaker outputs automatically detect when a speaker is connected, while status LEDs provide real-time feedback during setup. Ambient light sensing adjusts brightness to the environment, and all indicators are configurable in the app.
Intuitive configuration
An audible chirp identifies each unit in the Sonos app-no PIN required. Front and rear LEDs indicate setup mode for a more seamless experience
Manually tune each output
With ProTune, you can optimise the sound for the placement and room acoustics of any low-impedance passive speakers. This feature offers a comprehensive set of manual controls, including a 10-band parametric EQ and adjustable gain and delay offsets.
Power more speakers
Select the feature Optimise Sonos Speakers in the Sonos app to unlock the ability to power up to three Sonos Architectural speakers per output (24 total). The custom DSP optimises the EQ, while limiter control enables even and consistent volume dynamics throughout the frequency range.
Flexible connectivity
Connect via wired Ethernet or WiFi 6 and stream up to four audio aources simultaneously using the Sonos app, Apple AirPlay2, or Spotify Connect. Analogue and USB inputs provide additional flexibility, and the subwoofer output is freely assignable to any zone.
Ready to rack
Designed specifically for Amp Multi, the 2U Rack Mount streamlines installations by reducing wasted space, maximising airflow, and keeping cable management clean.
Built to breathe
The Rack Mount creates space above and below each unit to support airflow in a clean, 2U configuration.
Streamlined installation
With its flat back design, Amp Multi slides easily onto the Rack Mount. Installation is satisfyingly simple.
Space-saving design
Looks right at home
Whether on a shelf, credenza, or mounted to the wall, Amp Multi’s compact design and refined finish make it an elegant addition to any space. It looks just as polished in plain sight as it does tucked into a rack.
Works with your devices
Partner integrations offer seamless control of your Sonos system alongside all your compatible smart home devices.
Responsible by design
From major technological innovations to thoughtful details, Amp Multi is engineered with sustainability at every level.
Recycled plastics
Amp Multi features 47% recycled plastic—helping reduce waste and give materials a second life.
Energy efficiency
GaN technology helps Amp Multi consume less than 5.5W at idle to reduce heat and improve reliability, while software enhancements further reduce energy use during playback and standby.
Eco packaging
The exterior and interior packaging is 100% recyclable and crafted using paper certified by the Forest Stewardship Council®.
Technical Specs
Audio
| Speaker Outputs | 8 amplified outputs each independently configurable for stereo or mono |
| Power | 125 W per channel @ 8Ω (all channels driven) |
| Minimum Impedance | 2.67Ω with Sonos Architectural speakers |
| Damping Factor | >400 (ref. 8 ohms, 20 Hz to 1 kHz) |
| Amplifier Technology | Class D with GaN and PFFB |
| Total Harmonic Distortion | 0.005% at 2.83Vrms-15Vrms |
| Frequency Response | ±0.5 dB, 15 Hz – 20 kHz |
| Channel Separation (Crosstalk) | -100dB at 1 kHz 2.83Vrms -80dB at 10 kHz 2.83Vrms |
| Signal-to-Noise Ratio | 114dB ref 125W into 8-Ohm |
| ProTune | 10-band parametric EQ with ±15dB gain, Q, and frequency control. Option for high-shelf, low-shelf, and bell filter types. All available on per-channel basis |
| Optimise Sonos Speakers | When selected in the Sonos app, Optimise Sonos Speakers allows Amp Multi to recognise Sonos Architectural speakers, then applies custom tuning and DSP to provide more robust sound with a more even frequency response, optimising system performance and ensuring stable operation. |
Details + Dimensions
| Dimensions (Single Unit) | Height: 2.52 in (64.5 mm) Width: 17.2 in (436.8 mm) Depth: 10.44 in (265.2 mm) |
Dimensions (with 2U Rack Mount) | Height: 3.47 in (82.3 mm) Width: 19.01 in (483 mm) Depth: 10.44 in (265.2 mm) |
| Weight | 5.06 kg |
| Colours | Black |
| Finish | Matte |
| LEDs | Front: Device status Rear: Device status, output status (x8), RJ45 status light |
Power + Connectivity
Power Consumption | 5.4 W (idle) 180 W (all channels driven at 1/8 output power, 8 Ohms) |
| Power | Auto-switching 100-240V 50/60Hz 10A AC universal input |
| Wired Networking Interface | 100BaseTX, Ethernet RJ45 |
| Wireless Networking Interface | Compatible with WiFi 6. Connect to Wi-Fi with any 802.11a/b/g/n/ac/ax 2.4 GHz/5 GHz broadcast-capable router. |
| Analogue Audio Input | 2 x RCA inputs -10dB (stereo into one zone) |
| USB-C Analogue Audio Input | 44.1 kHz / 16 bit (stereo into any zone) Requires Sonos Line-In Adapter |
| Subwoofer Connections | 1 x RCA output -10dB (configurable to output from one zone), and 1x Sonos Sub per zone |
| Direct Streaming Formats | Apple AirPlay 2, Spotify Direct Control, and more. |
| CPU | Quad Core 4xA55 1.9GHz |
What's in the box?
Sonos Amp Multi | |
Power Cable | Length: 6 ft (2 m) |
Sonos Banana Plugs | Set of eight (8) |
Documentation | Set-up guide and legal/warranty information |
Requirements
| Speakers | Passive speakers required for audio output |
Internet Connection | Ethernet connection or WiFi Ethernet needs Category 5 (CAT5) cable or higher |
Power Source | Nearby electrical outlet |
Sonos app | The latest generation of the Sonos app running on a compatible device |
Additional information
| Brand | Sonos |
|---|---|
| Product Type | Multiroom Amplifier, Streaming |
| Amplifier Connectivity | Sub Pre-Out, Multiroom, Network Port, Wi-Fi, USB, 8 Channel |