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Marantz Grand Horizon specifications and in-depth review

Marantz Grand Horizon

Manufacturer: Marantz

The Marantz Grand Horizon is a large-format speaker in the portable speakers category, built around a single full-range driver and a substantial physical footprint measuring 529.2 mm tall, 493 mm wide, and 255 mm deep. Weighing in at 21,300 g, it is clearly oriented toward stationary or semi-permanent placement rather than on-the-go use, and its 370W audio output reflects a focus on room-filling sound rather than compact convenience.

On the connectivity side, the Grand Horizon supports Wi-Fi 6 (802.11ax) alongside Wi-Fi 5 and Wi-Fi 4, Bluetooth 5.4 with AAC codec support, AirPlay, Spotify Connect, and both wired Ethernet and USB Type-C connections. Its frequency response spans from 28 Hz up to 20,000 Hz, with a sound pressure level rated at 111 dB/mW, and it includes HDMI ARC and eARC outputs along with Dolby Atmos decoding. Smartphone remote control and voice prompts are also part of the feature set.

Pros
  • Supports Wi-Fi 6 (802.11ax) alongside Wi-Fi 4 and Wi-Fi 5, providing flexible and up-to-date wireless network connectivity
  • Includes both HDMI ARC and HDMI eARC outputs, enabling direct integration with compatible home theater displays
  • Dolby Atmos decoding is built in, allowing for spatial audio playback from supported sources
  • Spotify Connect support enables direct streaming without needing a continuously active source device
  • A broad frequency range of 28 Hz to 20,000 Hz is covered by a single 370W driver, delivering substantial low-end extension without a separate subwoofer
  • Ethernet port and USB Type-C connection offer reliable wired alternatives to wireless streaming
Cons
  • At 21,300 g and with dimensions exceeding 500 mm in height, the unit is not practically portable despite being categorized as a portable speaker
  • No water resistance is provided, limiting placement options and ruling out any outdoor or humid-environment use
  • Wireless standalone use is not supported, meaning a constant wired power connection is required
  • Bluetooth range is limited to 10 m, and no aptX variants or LDAC are available, restricting high-quality wireless audio codec options
  • Stereo pairing with a second unit is not supported, so the setup is confined to a single-speaker configuration
  • No 3.5 mm audio jack or AUX input is present, removing common wired audio source options
Who is this for?

This unit is well suited to users setting up a fixed home audio or home theater environment, where its HDMI ARC and eARC outputs, Dolby Atmos decoding, and 370W single-driver output can be leveraged with a compatible display or receiver. Its support for Wi-Fi 6, AirPlay, Spotify Connect, and Ethernet makes it a strong fit for those who rely on network-based streaming as their primary audio source. Users who prefer smartphone-controlled playback without needing physical remote access will also find the remote smartphone support and voice prompts a practical combination for everyday use.

Who is this NOT for?

This product is a poor fit for anyone seeking genuine portability — at 21,300 g with a height exceeding 529 mm, it cannot reasonably be transported or used on the move, making it unsuitable for outdoor or travel use cases. The complete absence of water resistance further rules it out for any setting where moisture exposure is possible. Users who rely on analog audio inputs such as a 3.5 mm jack or AUX connection will find no wired source options available, and those wanting to expand to a stereo multi-speaker setup will be limited by the lack of stereo pairing support.

Design:

volume 66528.378 cm³
drivers count 1
water resistance None
travel bag is included ✕
has a touch screen ✕
has RGB lighting ✕
is a neckband speaker ✕
has a remote control ✕
weight 21300 g
height 529.2 mm
width 493 mm
thickness 255 mm

The Marantz Grand Horizon has a notably large physical build, measuring 529.2 mm in height, 493 mm in width, and 255 mm in depth, with a total volume of 66,528.378 cm³ and a weight of 21,300 g, making it a substantial unit intended for fixed placement rather than portability. It houses a single driver and offers no water resistance, so it is not suited for outdoor or wet environments. The design omits a travel bag, touch screen, RGB lighting, and a physical remote control, keeping the feature set focused and straightforward.

Sound quality:

has a subwoofer ✕
highest frequency 20000 Hz
lowest frequency 28 Hz
audio output power 1 x 370W
number of microphones 0
has a noise-canceling microphone ✕
sound pressure level 111 dB/mW

The Marantz Grand Horizon delivers audio through a single channel rated at 370W, covering a frequency range of 28 Hz to 20,000 Hz without a dedicated subwoofer. Its sound pressure level is specified at 111 dB/mW, indicating a high output ceiling for the driver configuration. The unit includes no microphones and therefore does not support noise-canceling or any other microphone-based functionality.

Power:

Connectivity:

Bluetooth version 5.4
supports Bluetooth pairing using NFC ✕
has a socket for a 3.5 mm audio jack ✕
has an AUX input ✕
has aptX Lossless ✕
has LDAC ✕
has aptX Adaptive ✕
has aptX HD ✕
has aptX ✕
has aptX Low Latency ✕
has AAC ✓
has AirPlay ✓
has Chromecast built-in ✕
has Auracast ✕
has Bluetooth LE Audio ✕
maximum Bluetooth range 10 m
supports Wi-Fi ✓
Wi-Fi version Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
Has USB Type-C ✓
has a 3.5mm male connector ✕
has an external memory slot ✕
is DLNA-certified ✕
supports Ethernet ✓
has a microphone input ✕

The Marantz Grand Horizon connects wirelessly via Bluetooth 5.4 with AAC codec support and a maximum range of 10 m, while also supporting AirPlay for network-based audio streaming; it does not include NFC pairing, aptX variants, LDAC, Auracast, or Bluetooth LE Audio. On the wired side, it offers Ethernet connectivity and a USB Type-C port, but lacks a 3.5 mm audio jack, AUX input, 3.5 mm male connector, external memory slot, microphone input, and DLNA certification. Wi-Fi is supported across three generations — Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), and Wi-Fi 6 (802.11ax) — and Chromecast built-in is not included.

Features:

Can be used wirelessly ✕
supports a remote smartphone ✓
has fast pairing ✕
has voice commands ✕
Has a radio ✕
Has voice prompts ✓
has a mute function ✕
works as a power bank ✕

The Marantz Grand Horizon supports smartphone remote control, allowing users to manage playback from a mobile device, and includes voice prompts to provide audio feedback during operation. It cannot be used wirelessly as a standalone unit and does not offer fast pairing, voice commands, a built-in radio, a mute function, or the ability to charge other devices as a power bank.

Miscellaneous:

supports pairing for stereo sound ✕
HDMI ARC / eARC HDMI ARC, HDMI eARC
has an HDMI output ✓
has Spotify Connect ✓
has Dolby Atmos ✓

The Marantz Grand Horizon includes an HDMI output with support for both HDMI ARC and HDMI eARC, enabling audio return channel connectivity with compatible displays. It also features Dolby Atmos decoding and Spotify Connect for direct streaming without requiring a separate source device. Stereo pairing with a second unit is not supported.

Final Verdict

The Marantz Grand Horizon is a stationary, home-oriented speaker that makes a strong case for users building a network-integrated audio setup, thanks to its Dolby Atmos decoding, HDMI ARC/eARC outputs, and multi-generation Wi-Fi support. Its 370W output, broad frequency response, and Spotify Connect integration reinforce its identity as a fixed-installation piece rather than anything resembling a portable device. Those aware of its physical scale and wired-only operating requirement will find it a capable and well-connected centerpiece for a home theater or dedicated listening room — provided they have no need for analog inputs, stereo pairing, or mobility.

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