Sonos Amp Multi

Built for professional installation, Amp Multi provides unmatched multi-zone flexibility with GaN and PFFB technology to completely redefine what an 8-channel amplifier can do.

Amp Multi delivers 8 x 125W of power across up to four zones, leveraging advanced GaN technology and post-filter feedback (PFFB) for greater efficiency, clarity, and control. With ProTune, installers can optimise the sound for any low-impedance passive speakers, tailoring performance to placement and room acoustics. ProTune offers a full suite of manual controls, including a 10-band parametric EQ plus adjustable gain and delay offsets, enabling truly bespoke audio experiences. Its innovative chassis design enhances thermal performance, while recessed connectors, status LEDs, and a streamlined 2U rack mount simplify setup and ensure reliable, fanless cooling.

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.

Setup made simple

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.

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.

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.

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 sources simultaneously using the Sonos app, Apple AirPlay 2, or Spotify Connect. Analogue and USB inputs provide additional flexibility, and the subwoofer output is freely assignable to any zone.

Easy app control
Control everything from the Sonos app—zones, sources, output assignments, and status monitoring—all in one place.

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
Amp Multi eliminates the need for vent panels between rack units and reduces the number of screws required for installation—saving time, rack space, and hardware.

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.

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 efficient
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®.

Specifications

Specifications

Speaker Outputs: 8 amplified outputs each independently configurable for stereo or mono

Power (Output): 125 W per channel @ 8Ω (all channels driven)

Minimum Impedance: 2.67Ω with Sonos Architectural speakers

Damping Factor: >400 (ref. 8Ω, 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): -100 dB at 1 kHz 2.83Vrms; -80 dB at 10 kHz 2.83Vrms

Signal-to-Noise Ratio: 114 dB ref 125 W into 8Ω

ProTune: 10-band parametric EQ (±15 dB gain, Q & frequency control); high-shelf, low-shelf & bell filter types; gain trim -15 to +5 dB; delay 0–50 ms; highpass 15–100 Hz (all available per channel)

Optimise Sonos Speakers: App-based recognition of Sonos Architectural speakers with custom tuning and DSP for improved frequency response and stable operation

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 Consumption: 5.4 W (idle); 180 W (all channels driven at 1/8 output power, 8Ω)

Power Input: Auto-switching 100–240V, 50/60Hz, 10A AC universal input

Wired Networking Interface: 100BaseTX Ethernet (RJ45)

Wireless Networking Interface: WiFi 6 compatible (802.11a/b/g/n/ac/ax, 2.4 GHz / 5 GHz)

Analogue Audio Input: 2 x RCA inputs -10 dB (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 -10 dB (configurable per zone); 1 x Sonos Sub per zone

Direct Streaming Formats: Apple AirPlay 2, Spotify Direct Control, and more

CPU: Quad Core (4 x A55 1.9 GHz)