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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.

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8 x 125W

4 Zones

ProTune

2U rack mount

GaN

PFFB

Eternet

WiFi 6

Apple Airplay 2

Fanless

Learn more about Sonos Amp Multi

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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-optimized chassis enhances performance and durability all within a compact design built for the 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.

Setup made simple

Manually tune each output

With ProTune, you can optimize 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 Optimize 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 optimizes 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. Analog 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.

More details

Built to breathe

The Rack Mount creates space above and below each unit to support airflow in a clean, 2U configuration.

Streamlined install

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.

Frequently Asked Questions

What is the warranty length for Amp Multi?

Amp Multi comes with a 3-year warranty, giving you peace of mind and reliable coverage.

Is the 125 W per channel rating peak power or continuous?

Amp Multi delivers 125 watts of continuous (RMS) average power per channel into an 8-ohm load, with all channels driven.

What is the damping factor of Amp Multi?

The damping factor is approximately 437 when paired with an 8-ohm speaker.

What if I’m in a noisy environment and my device can’t hear the setup chirp?

If the chirp is not detected, you can enter the PIN printed on the back of the unit directly in the Sonos app.

How much clearance does Amp Multi need for airflow if it’s not rack-mounted?

We recommend allowing at least four inches (10 centimeters) of space on the top and sides for proper ventilation.

Does Amp Multi support Trueplay?

No, Amp Multi introduces ProTune—a manual tuning feature that lets you fine-tune the sound for any low-impedance passive speaker and room. When used with Sonos Architectural speakers, enabling Optimize Sonos Speakers applies custom tuning and DSP tailored to their unique acoustic design.

Why is Amp Multi 1.5U in height, and how does that fit in a rack?

Amp Multi shares the same 1.5U height as Sonos Amp, ensuring consistency when mixing device types. The Rack Mount (sold separately) adds an extra 0.25U of space above and below the unit—for a total height of 2U—for optimal airflow and easier access without wasting rack space.

Why doesn’t the Rack Mount include additional rack screws?

To avoid waste and stay aligned with our sustainability goals, we only provide the screws needed to secure Amp Multi to the Rack Mount.

How do I assign the subwoofer output to a specific zone?

In the Sonos app, go to Zone Settings, select Connect Sub, and follow the instructions to assign the subwoofer output to the desired zone.

How many subwoofers can Amp Multi support?

Amp Multi supports Sonos Sub 4, Sub (Gen 3), and Sub Mini. You can assign one Sonos Sub per zone, up to four total. The subwoofer output port supports a powered third-party sub, which can be freely assigned to any zone in the app.

  • Speaker Outputs

    8 amplified outputs each independently configurable for stereo or mono

  • FTC Power Output Rating

    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.
    Gain trim: -15 - +5 dB
    Delay: 0 - 50ms
    Highpass: 15-100HzAll available on per channel basis

    Optimize Sonos Speakers
    When selected in the Sonos app, Optimize Sonos Speakers allows Amp Multi to recognize Sonos Architectural speakers, then applies custom tuning and DSP to provide more robust sound with a more even frequency response, optimizing system performance and ensuring 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

    11.17 lbs (5.06 kgs)

  • Colour

    Black

  • Finish

    Matte

  • LEDs

    Front: Device status
    Rear: Device status, output status (x8), RJ45 status light

  • Power Consumption

    5.4 W (idle, with WiFi disabled)
    180 W (all channels driven at 1/8 output power, 8 Ohms)


  • Power

    Auto-switching 100-240V 50/60 Hz 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

  • Analog Audio Input

    2 x RCA inputs -10dB (stereo into one zone)

  • USB-C Analog Audio Input

    44.1 kHz / 16 bit (stereo into any zone)
    Requires Sonos Line-In Adapter

  • Sonos Amp Multi

  • Power Cable

    Length: 6 ft (2 m)

  • Sonos Banana Plugs

    Set of eight (8)

  • Documentation

    Quickstart Guide and legal/warranty information 

  • Speakers

    Passive speakers required for audio output

  • Internet Connection

    Ethernet connection or WiFi
    Ethernet needs Category 5 (CAT5) cable or higher 

  • Power Source

    Electrical outlet


  • Sonos App

    The latest generation of the Sonos app running on a compatible device 

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