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Overview
With the Home 400, Denon introduces Dolby Atmos Music to its wireless speaker lineup for the first time. Two upward-firing drivers are added to the standard configuration to create a vertical soundstage — an approach that remains rare in this segment. The speaker retains the DNA of the Home series: HEOS integration, multiroom compatibility and refined finishes, while stepping up acoustically.
Six drivers, six amplifiers
The Home 400 houses a set of six transducers, each powered by its own Class D amplifier. Two 19 mm tweeters handle the high frequencies, while two 114 mm (4.5-inch) woofers cover the bass and midrange. The standout addition is the two 25 mm upfiring drivers positioned on top of the cabinet. These transducers project sound toward the ceiling to create the height effect characteristic of Dolby Atmos.
This multi-channel configuration allows the speaker to reproduce Dolby Atmos Music mixes available on compatible streaming platforms. The result differs noticeably from traditional stereo listening: instruments and vocals can be positioned above the listener, not just in front of them.
Wi-Fi 6 and high-resolution audio
The Home 400 adopts Wi-Fi 6 (802.11ax) across the 2.4 GHz, 5 GHz and 6 GHz bands. This upgrade over previous models improves connection stability in congested network environments and reduces latency during multiroom streaming.
The speaker supports high-resolution audio files via the home network or from a USB-C device. Lossless formats such as FLAC, WAV and DSD are transmitted without destructive conversion. Tidal, Qobuz and Amazon Music can stream their catalogs in lossless quality directly to the speaker.
The USB-C port replaces the traditional USB-A and also serves as a connection for a wired Ethernet adapter — a useful option when Wi-Fi proves unreliable. A 3.5 mm auxiliary input rounds out the connectivity options for analog sources.
The HEOS ecosystem and voice assistants
The HEOS platform remains the nerve center of the speaker. The app allows you to group multiple compatible Denon or Marantz speakers, create separate listening zones, or synchronize the entire home to a single source. Spotify Connect, Tidal Connect and Roon Ready work natively.
A built-in microphone enables voice commands via Siri (with AirPlay 2). A physical button lets you mute the microphone for those who prefer to keep control over this feature. Three Quick Select buttons on the top panel provide direct access to favorite stations or playlists.
Wireless home theater integration
Two Home 400 speakers can operate as a stereo pair to widen the soundstage. The speaker also integrates into a wireless 5.1 system built around the Denon Home Sound Bar 550 and the Home subwoofer. In this configuration, the Home 400 units serve as rear surround speakers, with Dolby Atmos support throughout.
Bass, treble and stereo width (Width Control) adjustments are made through the HEOS app to tailor the sound to the acoustics of the room.
Design and finishes
The 300 × 150 × 219 mm cabinet weighs 4.2 kg. A fabric grille wraps around three sides of the structure, with a backlit touch panel on top. Two color options are available: Stone (light gray) and Charcoal (dark gray). The universal power supply (100–240 V) is compatible with all electrical networks.
What the press says
The sound that erupts from the Denon Home 400 is quite spectacular. The soundstage comfortably extends beyond the width of the speaker. [...] The clarity of the Home 400's vocal delivery is excellent and natural. The centre of soundstage is so clear and spacious – this is one of the most spacious-sounding wireless speakers I've heard. [...] The HEOS app is fine but not the most intuitive or responsive to use.
The Home 400 has been improved especially in terms of sound engineering, partly through the addition of upward-firing drivers and Dolby Atmos support. As a result, the Denon speaker sounds much larger than you would expect, even when listening to music in stereo. [...] The music does not simply come from a single point. This Late Night Tales album also mainly aims to evoke a certain atmosphere that – indeed – brings to mind late at night in the big city. The Denon speaker is able to convey that, something many wireless speakers fail at because of their more compressed sound. [...] I did notice, however, that it performed best when I was sitting directly in front of the Home 400; at an angle there was still noticeable roll-off.
Automatically translated — Show original (Dutch)
De Home 400 is vooral op geluidstechnisch vlak aangepakt, onder meer door de toevoeging van bovenliggende drivers en Dolby Atmos-ondersteuning. Hierdoor speelt de Denon-speaker veel grootser dan je zou verwachten, ook als je luistert naar muziek in stereo. [...] De muziek komt niet zomaar uit een punt. Ook deze Late Night Tales-album wil vooral een bepaald sfeer opwekken die – jawel – doet denken aan 's avonds laat in de grootstad. De Denon-speaker kan dat dus overbrengen, iets dat veel draadloze speakers door hun meer gecomprimeerde klank in falen. [...] Dan merkte ik wel dat het best presteerde als ik recht voor de Home 400 zat, onder een hoek was er toch wel merkbare roll-off.
What is the difference between the Home 400 and the Home 350?
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The Home 400 adds two 25 mm upfiring drivers for Dolby Atmos Music, a feature absent from the Home 350. It also incorporates Wi-Fi 6 (including the 6 GHz band) and a USB-C port instead of USB-A. The acoustic configuration moves to six transducers — as does the 350 — but with a different layout that includes height channels.
Does Dolby Atmos work with all streaming services?
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No. Dolby Atmos Music requires a compatible service (Apple Music, Tidal, Amazon Music) and a subscription that provides access to Atmos content. Tracks not mixed in Atmos are played back in standard stereo.
Can the Home 400 be used without an internet connection?
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Yes, via Bluetooth or the 3.5 mm auxiliary input. The USB-C port also allows playback of locally stored files. HEOS functions and streaming, however, require a network connection.
Is the speaker compatible with Alexa or Google Assistant?
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The spec sheet only mentions Siri compatibility via AirPlay 2. No mention of built-in Alexa or Google Assistant appears in the official specifications.
What cable is needed for the Ethernet connection?
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The USB-C port requires a USB-C to Ethernet adapter (not included). This solution is suitable for installations where Wi-Fi lacks stability.
Can the Atmos speakers be disabled for pure stereo listening?
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The settings available through HEOS include bass, treble and width control. The documentation does not specify whether the height channels can be disabled individually.
Does the Home 400 replace the Home 350 in the lineup?
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Both models coexist. The Home 400 sits above the 350, with Dolby Atmos as its main selling point. The 350 remains a relevant choice for traditional stereo listening without the need for vertical spatialization.
User reviews
Joakim
The soundstage is a little strange, and it's difficult to adjust it to get really good sound. Some frequency ranges disappear while others become exaggerated. I would have appreciated a simple equalizer instead of the various automatic functions for height and width, etc.
Comment from 6 October 2026 — Experience from 25 September 2026
Automatically translated — Show original (Swedish)
Ljudbilden är lite märklig och det är svårt att sälla in den för att få ett riktigt bra ljud. Vissa register försvinner medan andra blir överdrivna. Hade uppskattat en enkel equalizer istället för de olika automatiska funktionerna för höjd och bredd m.m.
Eco-contribution of €0.75 included in the sale price.
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