Sonos Amp Review 2025: The Smartest Way to Power Your Passive Speakers
There is a category of audio enthusiast that existing wireless speaker systems have never quite served properly. They are the people who already own a pair of quality passive speakers. Bookshelf speakers that cost real money and sound genuinely excellent. Floor standing speakers that were chosen carefully and have been broken in over years of listening. Speakers that have sentimental value, sonic value, or both, and that no off the shelf wireless speaker is going to replace without a meaningful step backward in sound quality.
For those people, the question has always been the same. How do you bring modern wireless streaming convenience to a system built around passive speakers without compromising the sound quality those speakers are capable of delivering?
The Sonos Amp is the answer to that question. It is a powerful, compact stereo amplifier with full Sonos ecosystem integration built in, designed specifically to power passive speakers and bring them into the connected audio world without asking you to give anything up.
What Is the Sonos Amp?
The Sonos Amp is a network connected stereo amplifier. It connects to your home Wi Fi network, receives audio from streaming services and other network sources, amplifies that signal with 125 watts per channel into 8 ohms, and delivers it to a pair of passive speakers connected via standard binding posts on the rear panel.
It is the evolution of the Sonos Connect Amp, which served a similar purpose in the previous generation of the Sonos product lineup. The current Sonos Amp brings substantially more power, improved thermal management, HDMI ARC connectivity for television integration, and a more refined physical design to that same fundamental concept.
The Sonos Amp is not a replacement for a separate streamer and amplifier combination at the very top of the hi fi market. It is something more interesting than that. It is a single component that does what a streamer and a quality integrated amplifier do together, with the added benefit of full Sonos platform integration, in a package that is smaller than most amplifiers alone.
Design and Build Quality
The Sonos Amp has a distinctly different physical profile from most stereo amplifiers. It is wide and flat, measuring 217mm wide, 64mm tall, and 195mm deep. This low profile design allows it to fit in spaces where a conventional amplifier would not, including shallow equipment shelves, custom installation enclosures, and in wall or in ceiling speaker installations where the amplifier needs to live in a confined space.
The chassis is aluminium and the finish is consistent with the rest of the Sonos range in matte black. The top surface functions as a heatsink for the amplifier’s thermal management system, which means it will become warm during extended use at higher volumes. This is normal and by design. Adequate ventilation above the unit is recommended, particularly in enclosed rack installations.
The front face is minimal. A single touch button handles play and pause and a small status indicator shows the current operating state. All meaningful interaction with the Amp happens through the Sonos app rather than physical controls, which keeps the front panel clean and unobtrusive.
Build quality is serious throughout. The binding posts on the rear accept bare wire, spade connectors, and banana plugs, covering every standard method of speaker cable termination. The connections feel solid and the overall impression is of a component built to last rather than one designed to a price point.
Power Output: 125 Watts Per Channel
The headline specification of the Sonos Amp is its power output of 125 watts per channel into 8 ohms. This is a meaningful number that requires some context to appreciate fully.
Most passive speakers intended for home use have sensitivity ratings between 85 and 92 dB per watt at one metre. At 125 watts per channel, the Sonos Amp can drive virtually any passive speaker designed for domestic use to levels well beyond what most rooms and most listeners will ever require. More importantly, having substantial power reserves means the amplifier is not working hard during normal listening levels. An amplifier running well below its maximum output sounds cleaner and more composed than one being pushed toward its limits, and the Sonos Amp’s power headroom ensures it stays in that comfortable operating range across all practical listening scenarios.
The Amp is rated for speakers with impedances from 4 ohms to 16 ohms, which covers the full range of passive speakers you are likely to encounter. Lower impedance speakers such as many floor standing designs draw more current from an amplifier, and the Sonos Amp’s power supply is designed to handle these loads without strain.
For in ceiling and in wall speaker installations, the Sonos Amp’s power output and impedance compatibility make it suitable for driving multiple pairs of speakers in parallel when used with an impedance matching volume control system, which is a common requirement in whole home audio installations.
Connectivity: More Than Just Speaker Outputs
The rear panel of the Sonos Amp is more comprehensively equipped than you might expect from a component of its size.
Speaker outputs via binding posts accept standard speaker cables for connection to passive speakers. These are the primary output and the reason the Amp exists.
HDMI ARC is one of the Amp’s most distinctive features compared to competing network amplifiers. This connection allows the Amp to receive audio from a television and process it through your passive speakers, effectively turning a pair of bookshelf or floor standing speakers into a television sound system without a separate soundbar. When your television sends audio via HDMI ARC, it appears as a source in the Sonos app alongside all your streaming services. This is genuinely useful for anyone who wants the quality of their passive speakers applied to television audio rather than investing in a separate soundbar.
RCA line in accepts analogue sources including turntables with phono preamps, CD players, and other line level components. Audio fed into the line in can be amplified through the connected speakers and optionally streamed to other Sonos speakers throughout the home over the network, the same capability offered by the Sonos Port’s line in.
Ethernet provides a wired network connection option alongside Wi Fi, which is recommended for a component serving as a permanent amplifier in a fixed installation.
A subwoofer output sends a line level signal to a compatible powered subwoofer if you want to extend the bass performance of your system beyond what your passive speakers provide. The Sonos Sub can also be added wirelessly to a system built around the Sonos Amp, which is an elegant solution for adding deep bass without additional cabling.
Sound Quality: Does an All in One Amplifier Compromise
This is the question that serious audio enthusiasts will want answered honestly, and the honest answer is that the Sonos Amp sounds better than its convenience and price point might lead you to expect.
The amplifier stage is clean and neutral. It does not impose a character on the music in the way that some budget amplifiers do. High frequencies are extended without being harsh. The midrange is clear and present. Bass control is firm and well defined, which matters particularly for speakers with larger woofers that benefit from a tight, well damped amplifier output.
At moderate listening levels the Sonos Amp sounds composed and detailed. At higher volumes it maintains its composure rather than becoming strained or compressed, which is a direct benefit of the power headroom discussed earlier. The amplifier is working well within its limits during normal use and it sounds like it.
The honest caveat is that a dedicated high end separate amplifier of equivalent cost or higher will outperform the Sonos Amp in absolute terms. The Sonos Amp is not competing with a dedicated two box streamer and amplifier combination at twice its combined price. It is competing with the best all in one network amplifiers at its price point, and in that context it performs very well indeed. For most passive speaker setups and most listening environments, the Sonos Amp will be the least limiting component in the signal chain rather than the weakest link.
The Sonos Ecosystem Advantage
The Sonos Amp’s integration with the Sonos ecosystem is what separates it from conventional network amplifiers and streaming amplifiers that operate as standalone devices.
Once the Amp is added to your Sonos system it participates in everything the platform offers. Group it with other Sonos speakers for synchronised whole home audio. Play different content in different rooms simultaneously. Control everything from the Sonos app on iOS or Android. Use Apple AirPlay 2 to stream directly from iPhone or iPad at lossless quality. Ask Amazon Alexa or Google Assistant to control playback through the Amp’s connected speakers.
For someone who already uses Sonos throughout their home, adding the Amp means their passive speaker system becomes a fully integrated participant in the existing ecosystem rather than an isolated component that requires separate management. This level of integration is not available from any competing network amplifier at this price point.
Using the Sonos Amp for In Ceiling and In Wall Speakers
One of the most common professional installation applications for the Sonos Amp is powering in ceiling or in wall passive speakers as part of a distributed audio system.
The Amp’s compact form factor makes it suitable for installation in rack enclosures, equipment cupboards, and utility spaces where a conventional amplifier would be too large. Its network connectivity and Sonos integration mean each zone of a multi room installation can be controlled independently through the same app without a complex matrix amplifier or distribution system.
For residential installations where the goal is high quality background music throughout the home with simple intuitive control, a Sonos Amp driving in ceiling speakers in each zone is one of the most practical and cost effective solutions available. Architects, interior designers, and custom installation professionals frequently specify the Sonos Amp for this purpose because it delivers the performance and control required without the complexity of traditional distributed audio systems.
Sonos Amp vs Sonos Port: Which One Do You Need
The Sonos Port and the Sonos Amp solve related but distinct problems and the choice between them depends entirely on whether you already own an amplifier.
If you have a quality amplifier that you want to keep and you need to add streaming capability to it, the Sonos Port is the right product. It connects to your amplifier’s line input and delivers audio from the Sonos ecosystem without replacing any of your existing components.
If you do not have an amplifier, or if you want to power a set of passive speakers in a location where installing a full sized amplifier is impractical, the Sonos Amp is the right product. It combines the streaming capability of the Port with a powerful amplifier stage in a single compact component.
The two products serve the same ecosystem and integrate with each other and all other Sonos devices. The decision between them is simply a question of whether your setup already includes an amplifier.
Who Should Buy the Sonos Amp?
The Sonos Amp is the right product for several clearly defined situations.
If you own a pair of quality passive speakers and want to power them with streaming capability and Sonos ecosystem integration in a single component, the Amp is built for exactly that application.
If you are installing ceiling or wall speakers in one or more rooms and need a compact, network connected amplifier for each zone, the Amp is one of the most practical and well supported options available.
If you want to use your passive speakers as a television sound system via HDMI ARC while also having full streaming capability through the same speakers, the Amp’s HDMI ARC input makes this possible without a soundbar.
If you already have a Sonos system and want to add a room with passive speakers to that ecosystem without purchasing a separate streamer and amplifier, the Amp handles both functions in a single unit.
Is the Sonos Amp Worth the Price
The Sonos Amp sits at a price point that reflects both its amplifier capability and its Sonos ecosystem integration. Evaluated purely as an amplifier, alternatives exist at lower prices that offer similar raw power output. Evaluated purely as a network streamer, alternatives exist that offer similar streaming capability for less money.
The value of the Sonos Amp is in what it provides when those two things are combined with full ecosystem integration, HDMI ARC connectivity, and the long term software support that Sonos provides across its product range. No competing product at this price point offers all of those things together in a package this size.
For anyone powering passive speakers in a modern home audio context, the Sonos Amp is a genuinely compelling solution that justifies its price through daily usefulness and long term reliability.
Quick Specs
Power Output: 125 watts per channel into 8 ohms
Speaker Impedance: 4 to 16 ohms
Connections Out: Binding post speaker outputs, RCA subwoofer out
Connections In: HDMI ARC, RCA line in, Ethernet
Wireless: Wi Fi 802.11 b/g/n/ac at 2.4 GHz and 5 GHz
Streaming: Apple AirPlay 2, Sonos S2 app
Voice Control: Amazon Alexa and Google Assistant compatible
Dimensions: 217 x 64 x 195mm
Weight: 1.77 kg
Colour: Matte black
App: Sonos S2 on iOS and Android
Final Word
The Sonos Amp does something genuinely useful. It takes the passive speakers you already own or want to own and gives them access to every streaming service, every internet radio station, every music file on your network, and the full intelligence of the Sonos platform, all from a component smaller than most paperback books.
It does not ask you to replace your speakers. It does not ask you to learn a new system. It simply amplifies your music and connects your speakers to the modern world, which is exactly what it was designed to do.
If you have passive speakers that deserve better than a Bluetooth adapter or a cheap streaming device, the Sonos Amp is what it sounds like.
Frequently Asked Questions About the Sonos Amp
Q1. What types of speakers work with the Sonos Amp?
The Sonos Amp works with any passive speakers with an impedance rating between 4 ohms and 16 ohms. This covers the vast majority of bookshelf speakers, floor standing speakers, ceiling speakers, and in wall speakers designed for home use. The Amp’s 125 watts per channel output is sufficient to drive virtually any passive speaker intended for domestic use to levels well beyond normal listening volumes. The binding posts on the rear accept bare wire, spade connectors, and banana plugs, covering all standard speaker cable termination methods.
Q2. Can the Sonos Amp be used to power ceiling speakers?
Yes. The Sonos Amp is one of the most commonly specified amplifiers for ceiling and in wall speaker installations. Its compact dimensions make it suitable for rack or cupboard installation, and its Sonos integration means each zone can be independently controlled through the app. For installations with multiple pairs of in ceiling speakers wired in parallel, an impedance matching volume control system should be used to keep the combined load within the Amp’s 4 ohm minimum impedance rating. A custom installation professional can advise on the appropriate configuration for your specific setup.
Q3. How does the HDMI ARC input on the Sonos Amp work?
The HDMI ARC input allows the Sonos Amp to receive audio from a television via a standard HDMI cable connected to the television’s ARC port. When active, audio from the television is sent to the Amp and played through your connected passive speakers. This appears as a source in the Sonos app alongside your streaming services. It allows your passive speakers to serve as a television sound system without a separate soundbar, which is particularly useful if your speakers are already in the room where your television lives and you want to avoid the cost and space of an additional soundbar.
Q4. Can I add a subwoofer to the Sonos Amp?
Yes in two ways. The Amp has an RCA subwoofer output on the rear panel that sends a line level signal to any powered subwoofer with an RCA input. Alternatively you can add a Sonos Sub wirelessly to a system built around the Amp through the Sonos app. The wireless Sub option is particularly elegant as it requires no additional cabling and integrates fully with Trueplay calibration for the whole system. Both options extend the low frequency performance of your system beyond what your passive speakers provide on their own.
Q5. Does the Sonos Amp support Trueplay room calibration?
Yes. The Sonos Amp supports Trueplay, Sonos’ room calibration system. Running Trueplay on a system built around the Amp requires an iPhone or iPad and uses the iOS device’s microphone to measure how sound behaves in your specific room. The app then adjusts the Amp’s output EQ to compensate for the acoustic characteristics of your room and the frequency response characteristics of your connected speakers. The result is a more balanced and natural sound that accounts for your actual listening environment rather than relying on a flat factory setting.
Q6. What is the difference between the Sonos Amp and the Sonos Port?
The Sonos Port is a source component and streamer with no amplification capability. It connects to an existing amplifier via RCA or optical outputs and adds streaming capability to that system. The Sonos Amp combines a network streamer with a 125 watt per channel stereo amplifier in a single unit, designed to power passive speakers directly without a separate amplifier. If you already have an amplifier you want to keep, the Port is the right choice. If you need amplification for passive speakers along with streaming capability, the Amp is the appropriate product.
Q7. Can the Sonos Amp drive 4 ohm speakers safely?
Yes. The Sonos Amp is rated for speakers with impedances from 4 ohms to 16 ohms and is designed to handle 4 ohm loads without strain. At 4 ohms the amplifier will deliver more current and run warmer than at 8 ohms, so adequate ventilation is particularly important when driving low impedance speakers at higher volumes. Ensure the Amp has sufficient airflow above the chassis, especially in rack installations, and avoid enclosing it in a space with poor ventilation when using 4 ohm speakers at sustained high volumes.
Q8. Does the Sonos Amp work with Google Assistant?
The Sonos Amp does not have a built-in microphone and does not respond to voice commands directly. However it is compatible with Google Assistant through the Sonos app and Google Home integration. You can ask any Google Assistant enabled device in your home to play music through the Amp by addressing it by the room name assigned in the Sonos app. Amazon Alexa works in the same way. For a Sonos system with voice control built directly into the amplifier zone, placing a Sonos Era 100 or other Alexa enabled Sonos speaker in the same room as the Amp is a common solution.
Q9. How many Sonos Amps can I use in the same home?
There is no practical limit to the number of Sonos Amps that can be used in the same home. Each Amp appears as a separate room in the Sonos app and can be controlled independently or grouped with other rooms for synchronised audio. Multi room installations with several Sonos Amps driving in ceiling or in wall speakers in different zones are common in residential and commercial settings. Each Amp connects to the home network independently and is managed through the same Sonos app as all other Sonos devices in the system.