Denon Home 400 Multiroom Speaker Silver

Dolby Atmos Music from a Single Wireless Speaker

The Denon Home 400 Silver is a self-contained wireless smart speaker engineered to deliver Dolby Atmos Music without a separate AV receiver or extra cabinets. A custom six-driver array — including dual up-firing height channels — projects sound upward so it reflects off the ceiling and returns to the listener, creating a three-dimensional soundstage from one enclosure. Built-in Class-D amplification drives each driver independently. The result is detailed, room-filling stereo with a vertical dimension most standalone speakers cannot reproduce.

Real Height Channels and HEOS Whole-Home Streaming

Unlike virtualized Atmos implementations, this model uses physical up-firing drivers rather than DSP-only processing, so the Atmos effect is genuinely reflected off the ceiling in a typical room. HEOS Built-in ties the speaker into a flexible multiroom system — group rooms, play different sources in each zone, or pair two Home 400 units for a wider stereo image. A USB-C port doubles as a wired Ethernet adapter for installations where Wi-Fi reliability matters, and the speaker can also act as a wireless surround channel alongside the Denon Home Sound Bar 550.

Technical Specifications

• Drivers: 6 total — 2× 19 mm tweeters, 2× 25 mm up-firing, 2× 114 mm woofers
• Amplification: 6 built-in Class-D power amplifiers, one per driver
• Wireless: Wi-Fi 2.4/5/6 GHz (IEEE 802.11a/b/g/n/ac/ax), Bluetooth, AirPlay 2
• Wired Inputs: USB-C (music or Ethernet adapter), 3.5 mm AUX
• Dimensions: 300 × 150 × 219 mm — Weight: 4.2 kg
• Power Supply: AC 100–240 V, 50/60 Hz

Who Is It For

The Denon Home 400 Silver is the right choice for listeners who want genuine Dolby Atmos Music from a single speaker in medium to large rooms, without committing to a full home theater stack. It suits music-first households building a HEOS multiroom system, owners of a Denon Home Sound Bar 550 who want to add wireless surrounds, and anyone who values lossless streaming from TIDAL, Qobuz and Amazon Music HD. Built-in microphones with a physical mute switch and Siri compatibility add hands-free control, while the touch-sensitive top panel keeps everyday playback within reach.