Denon Home 400 charcoal
Specifications and features
Awards
IF Product Design Award
The iF Design Awards, created in 1953, represent one of the world's leading design competitions. Each year, it attracts over 1,800 participants from 30 different countries. The jury, composed of globally renowned designers, not only examines and selects the chosen products but also adheres to stringent requirements to maintain a high-quality label.
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 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)
Technical Specifications
Audio Section
- Acoustic configuration: active multi-channel system
- Amplification: 6 dedicated Class D digital amplifiers
- Number of speakers: 6
- Tweeters: 2 × 19 mm
- Upward-firing elevation speakers (Dolby Atmos): 2 × 25 mm
- Woofers: 2 × 114 mm
- Audio processing: acoustic optimization by Denon Sound Master
- Supported audio formats
- High-resolution audio
- DSD (via USB or network)
- High-resolution streaming (TIDAL, Qobuz, Amazon Music, etc.)
Audio Technologies and Features
- Dolby Atmos Music: immersive playback with vertical dimension
- Multiroom streaming: via built-in HEOS technology
- Stereo pairing: yes (with a second compatible Denon Home speaker)
- Home theater compatibility: can be used as a surround speaker with the Denon Home Sound Bar 550
- Subwoofer compatibility: yes (Denon Home Subwoofer via HEOS)
- Audio settings: bass, treble, sound width
- Voice assistant: Siri compatible
- Built-in microphone: with on / off switch
Connectivity
- Wi-Fi
- Bands: 2.4 GHz / 5 GHz / 6 GHz
- Standards: IEEE 802.11 a / b / g / n / ac / ax
- Bluetooth: yes
- AirPlay 2: yes
- Audio inputs
- 1 × 3.5 mm auxiliary input
- 1 × USB-C port (audio playback or Ethernet adapter)
Control Features
- Quick Select buttons: 3
- Controls: volume, play / pause
- Action button: voice assistant activation
- Full control via HEOS app
Power
- Built-in power supply: 100 – 240 V, 50 / 60 Hz
Key Technical Highlights
- 6-speaker architecture with dedicated amplification
- Immersive Dolby Atmos Music compatibility
- High-resolution streaming via Wi-Fi, AirPlay 2 and Bluetooth
- Complete HEOS multiroom ecosystem
- Operation in stereo or home theater configuration
General Information
- Product type: high-fidelity wireless multiroom connected speaker
- Model: Denon Home 400
- Dimensions (W × D × H): 300 × 150 × 219 mm
- Weight: 4.2 kg
Frequently Asked Questions
What is the difference between the Home 400 and the Home 350?
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?
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?
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?
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?
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?
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?
Both models coexist. The Home 400 sits above the 350, with Dolby Atmos as its main selling point. The 350 remains relevant for traditional stereo listening without the need for vertical spatialization.
- Eco-contribution of €0.75 included in the sale price.
- Manufacturer reference: DENONHOME400BKE2
- GTIN / EAN: 747192145903
