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SONOS AMP MULTI 8 Channel Multi-Zone Amplifier (Amp Multi)

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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.

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.

  • 8 amplified outputs at 125W each into 8 ohms
  • Up to 4 independently configurable zones, any output assignable to any zone
  • GaN Class-D amplification with Post-Filter Feedback (PFFB) for clean, stable output
  • ProTune manual DSP: 10-band parametric EQ, +/-15dB gain, 0-50ms delay, 15-100Hz high-pass filter
  • Supports up to 3 Sonos Architectural speakers per channel (24 speakers total)
  • WiFi 6 and Ethernet connectivity; AirPlay 2 and Spotify Connect supported
  • Fanless, convection-cooled 1.5U chassis; optional 2U rack mount sold separately

This requires professional installation. Contact us for further details.

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Sonos Amp Multi is a professional-grade, 8-channel streaming amplifier built for complex, multi-zone residential installations. Each of its eight 125-watt channels can be assigned to any of up to four independent zones, giving installers the flexibility to adapt a system as a home’s layout evolves. Built on a GaN power architecture paired with Class-D post-filter feedback, Amp Multi delivers clean, stable output while running silently with no fans. ProTune gives trained installers granular per-channel control (EQ, gain, delay, high-pass filtering) for fine-tuning difficult rooms and speaker placements, while Optimize Sonos Speakers automatically profiles connected Sonos Architectural speakers. Designed for the rack, with a flat back, recessed connectors, and an 8-screw install into the dedicated 2U rack mount (sold separately).

Back panel of Amp Multi showing 8 sets of speakers wired up for independent multi-zone control
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.

Ready to rack

Designed specifically for Amp Multi, the 2U Rack Mount streamlines installations by reducing wasted space, maximizing airflow, and keeping cable management clean.

Three Sonos Amp Multis installed in an open rack using the Amp Multi Rack Mount.
Built to breathe

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

Three Sonos Amp Multis installed in an open rack using the Amp Multi Rack Mount.

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.
A home kitchen and living room with in-ceiling architectural speakers and Sonos products
Works with your devices

Partner integrations offer seamless control of your Sonos system alongside all your compatible smart home devices.

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®.

Tech Specs

AUDIO

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: 15-100Hz

All 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.

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

11.16 lbs (5.06 kg)

Colors

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.

Learn more

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

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.

Learn more

CPU

Quad Core
4xA55 1.9GHz

Box Contents

Sonos Amp Multi

Power Cable

Length: 6 ft (2 m)

Sonos Banana Plugs

Set of eight (8)

Documentation

Quickstart 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

Downloads

 

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