Sonos

Sonos Amp Multi – 8-Channel Multi-Zone Streaming Amplifier

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AMP MULTI

Coming Soon!

Contact Us

Please call us at 1-905-270-3440 or simply fill out the form below for ordering & more info.

Product Overview

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 optimize 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.

Features

  • 8 × 125W amplification delivering powerful sound for passive speakers
  • 4 independent audio zones allowing different music in multiple rooms
  • Professional multi-zone architecture designed for custom installations
  • Flexible zone assignment – any output can be assigned to any zone
  • GaN amplifier technology for efficient power delivery and reduced heat
  • PFFB (Post-Filter Feedback) for improved sound accuracy and stability
  • Fanless design for silent operation and improved reliability
  • Rack-mountable chassis designed for professional AV racks and installations
  • ProTune audio tuning tools for detailed sound customization and system optimization
  • Sonos app control for zone management, source selection, and system monitoring
  • Wi-Fi 6 and Ethernet connectivity for stable network streaming
  • Apple AirPlay 2 support for wireless streaming from Apple devices
  • Spotify Direct Control and other streaming integrations
  • Expandable system design – add additional units to scale larger installations
  • Supports large speaker deployments with multiple speakers per output
  • RCA analogue input for connecting external audio source
  • USB-C analogue input for flexible source connectivity
  • Subwoofer output for adding deeper bass to a zone

Installation & System Design

  • Designed specifically for professional installers and multi-room systems
  • Allows centralized whole-home audio distribution
  • Clean cable management with rack-mount solutions
  • Zone configuration and monitoring directly from the Sonos app

Specifications

Audio

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 – 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 125W into 8Ω

ProTune
10-band parametric EQ with ±15 dB gain, Q, and frequency control
Filter types: high-shelf, low-shelf, and bell
Gain trim: -15 to +5 dB
Delay: 0 – 50 ms
High-pass filter: 15 – 100 Hz
All available on a per-channel basis

Optimize Sonos Speakers
Automatically detects Sonos Architectural speakers and applies custom DSP tuning for improved frequency response, stronger performance, and stable system operation.

Power & Connectivity

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

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

Wired Networking
100Base-TX Ethernet (RJ45)

Wireless Networking
Wi-Fi 6 compatible with 802.11a/b/g/n/ac/ax routers
Supports 2.4 GHz and 5 GHz networks

Analogue Audio Input
2 × 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 × RCA output (-10 dB, configurable to one zone)
Supports one Sonos Sub per zone

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

CPU
Quad-Core
4 × A55 @ 1.9 GHz

Dimensions & Weight

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
11.16 lb (5.06 kg)

Colour
Black

Finish
Matte

LED Indicators
Front: Device status
Rear: Device status, output status (×8), RJ45 status light

Requirements

Speakers
Passive speakers required

Internet Connection
Ethernet or Wi-Fi
Ethernet requires CAT5 cable or higher

Power Source
Nearby electrical outlet

Sonos App
Latest generation of the Sonos app on a compatible device

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.

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.

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.

Why does Sonos Amp have two Ethernet ports, while Amp Multi only has one?

Sonos Amp includes two ports for daisy-chaining multiple units, supporting up to four zones. Amp Multi’s design eliminates the need for extra ports while simplifying installation.

Is Bluetooth® supported?

No, Amp Multi does not include Bluetooth connectivity.

How do the audio stream inputs work, and how many AirPlay 2 connections are supported?

Each zone can utilize a separate source or stream. If Amp Multi is set up for four zones, each one can support its own AirPlay 2 stream, Spotify Connect session, or playback from the Sonos app.

Why doesn’t Amp Multi include HDMI like Sonos Amp?

Amp Multi is purpose-built for bespoke, distributed audio applications. If you need HDMI connectivity for TV or home theatre setups, Sonos Amp or a Sonos soundbar is the best fit, with both offering the ability to work seamlessly alongside Amp Multi in the same system.

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.

What is the damping factor of Amp Multi?

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