Denon Home 400 Multiroom Speaker Black

Denon Home 400 — Dolby Atmos Music in a Single Wireless Cabinet

The Denon Home 400 is a standalone wireless smart speaker that brings Dolby Atmos Music into the home without a soundbar, AVR, or separate subwoofer. A six-driver array with dual up-firing drivers adds a vertical dimension to music streamed from TIDAL, Apple Music, or Amazon Music HD. The HEOS platform ties streaming, multiroom grouping, and room calibration into a single app, with voice control via Siri, Alexa, and Google Assistant.

What Sets This Speaker Apart

Most wireless speakers stop at stereo. This model adds two 25 mm up-firing drivers that bounce height effects off the ceiling for a three-dimensional soundstage from a single enclosure. Each driver is fed by its own Class-D amplifier — six amps in total — so the cabinet never shares power between channels. Pair two units for a wider stereo image, or use a pair as wireless surrounds with the Denon Home Sound Bar 550 and a HEOS subwoofer.

Technical Specifications

• Drivers: 6 total — 2× 19 mm tweeters, 2× 25 mm up-firing, 2× 114 mm woofers
• Six Class-D Amplifiers — one channel dedicated to each driver, no shared power supply
• Wireless Inputs: Wi-Fi 2.4 / 5 / 6 GHz (802.11a/b/g/n/ac/ax), Bluetooth, AirPlay 2
• Wired Inputs — USB-C for stored music or Ethernet adapter, plus a 3.5 mm AUX jack
• Dimensions: 300 × 150 × 219 mm — slim enough for a shelf, deep enough for real bass
• Weight: 4.2 kg
• Power Supply: AC 100–240 V, 50/60 Hz built-in — no external brick on the floor

Who Should Buy This Speaker

This speaker is the right choice for listeners who want Dolby Atmos Music and multiroom flexibility from a single cabinet, without committing to a full home-theater stack. It suits living rooms and open-plan spaces where one unit needs to do the work of a stereo pair, and works equally well as a kitchen, bedroom, or study speaker in a HEOS whole-home setup. Owners of the Denon Home Sound Bar 550 can deploy a pair as wireless surrounds, with the up-firing drivers adding height to Atmos movie soundtracks. Three Quick Select buttons on top let users jump between favourite sources without opening the app.