Next-gen Amp for Multi-zone Sound
Sonos Amp Multi is a professional-grade, 8-channel streaming amplifier built to power expansive, multi-zone audio systems with precision and ease. Delivering 125 watts per channel into 8 ohms across up to four independent zones, Amp Multi is engineered with gallium nitride (GaN) transistors and post-filter feedback (PFFB) technology that combine to deliver remarkably low distortion, high efficiency, and completely fanless, silent operation. Pair the Amp Multi with Sonos Architectural speakers, and the Optimize Sonos Speakers feature automatically detects and safely drives up to 24 speakers from a single unit, while ProTune's manual 10-band parametric EQ gives you full tuning control over any low-impedance passive speaker. Sweetwater A/V installation experts report that setting up the Amp Multi is refreshingly simple: the Sonos app handles zone assignment, an audible chirp identifies each unit, and the optional 2U Rack Mount (sold separately) simply slides on for clean, scalable installations. For single rooms or entire homes, Amp Multi delivers the flexibility, power, and effortless control to make any space sound extraordinary.
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GaN amplification and fanless design
Amp Multi's amplification stage is built on GaN transistors, a newer class of power electronics that switch faster and run cooler than traditional silicon transistors. These are paired with PFFB, which continuously monitors the output signal against the input and corrects it in real time. The result is exceptionally low distortion (0.005% THD) that holds steady even as speaker loads vary across zones. That efficiency also pays off physically: Amp Multi consumes less than 5.5 watts at idle and requires no fans, relying entirely on its thermally-optimized, convection-cooled chassis to stay cool. Altogether, these features make the Sonos Amp Multi quiet by design, energy-efficient around the clock, and durable enough for long-term rack installation.
Automatic optimization for Sonos Architectural speakers
When Amp Multi is paired with Sonos Architectural speakers, its Optimize Sonos Speakers feature automatically detects the connected speakers and applies custom-built EQ profiles, limiter settings, and DSP tuning. This unlocks safe operation down to 2.67 ohms, allowing up to three speakers to be driven per channel instead of just one. Across all eight channels, a single Amp Multi can power up to 24 speakers, which is more than enough for large, distributed installations that would otherwise require multiple standard amplifiers. It's a thoughtful way to scale coverage without sacrificing sound quality or spending hours manually configuring your system.
Precisely dial in every channel, in every room
For installations using non-Sonos passive speakers, or for anyone who wants complete manual control over their system's sound, ProTune puts a full suite of professional tuning tools at your fingertips. Each of Amp Multi's eight outputs can be independently shaped with a 10-band parametric EQ, offering adjustable gain, frequency, Q, and filter type. Gain trim, delay offset, and a dedicated 15Hz–100Hz highpass filter can all be fine-tuned per channel as well, making it possible to compensate for reflective surfaces, tight corners, or asymmetrical room layouts. Whatever the speaker brand or room type, ProTune gives you the precision to dial in your preferred listening experience.
Multi-zone flexibility and streamlined install
Amp Multi's eight outputs can be freely assigned across up to four independent zones, giving you the flexibility to configure a single expansive zone, several smaller ones, or any combination in between — all managed through the Sonos app. Setup is designed for efficiency: each unit identifies itself with an audible chirp rather than requiring manual PIN entry, and front and rear LEDs provide real-time status feedback with automatic ambient light sensing. For larger installations, the optional 2U Rack Mount (sold separately) slides directly onto Amp Multi's flat-back design and secures with just eight screws, maximizing rack density while preserving the airflow its fanless design depends on. Whether you're outfitting a single room or a whole building, Amp Multi is engineered to make the setup process fast and simple.
Sonos: pioneers of wireless multiroom audio
True pioneers in the field of audio technology, Sonos has completely revolutionized home listening by perfecting the concept of — and implementation of — wireless multiroom audio. Since its founding in 2002 by four music-loving engineers in Santa Barbara, Sonos has continued to innovate with a state-of-the-art stable of wireless speakers, home theater systems, headphones, and architectural audio solutions. Backed by thousands of patents and guided by a team of Oscar- and Grammy-winning sound experts, Sonos delivers sound exactly as the artists intend: immersive, detailed, and emotional. Moreover, much like Sweetwater, Sonos cultivates a culture of creativity, inclusion, and sustainability, remaining committed to shaping the future of audio experiences worldwide.
Sonos Amp Multi Features:
- 8-ch., 4-zone streaming amplifier delivers 125W per channel into 8Ω for scalable, professional-grade multiroom home audio
- GaN Class D amplification with PFFB technology delivers low-distortion sound across varying speaker loads
- Fanless, convection-cooled design consumes just 5.4W when idling for quiet, efficient operation
- Optimize Sonos Speakers auto-detects connected Sonos Architectural speakers and safely drives up to 3 per channel, powering up to 24 speakers from a single unit for cost-effective, large-scale coverage
- ProTune 10-band parametric EQ gives you precise per-channel control over gain, frequency, Q, and delay, plus shelf, bell, and highpass filter options
- WiFi 6 and Ethernet connectivity support streaming via Apple AirPlay 2, Spotify Connect, or the Sonos app for flexible, reliable source control
- 2 RCA inputs, USB-C digital audio input, and a dedicated RCA subwoofer output let you route external sources and add low end to any zone
- Compact 1.5U chassis pairs with the optional 2U Rack Mount (sold separately) for streamlined, high-density installs
- Includes 8 custom banana plug outputs that are swappable with standard-diameter models
