Marantz Grand Horizon Wireless Speaker

Flagship eight-driver wireless speaker with Marantz Rise GaN FET amplification, HEOS streaming, Dolby Atmos decoding, and HDMI eARC

The Marantz Grand Horizon combines high-performance amplification, advanced digital signal processing, and high-resolution music streaming in a distinctive all-in-one wireless speaker. With eight individually powered drivers, Marantz Rise amplification technology, and proprietary Mirage DSP, Grand Horizon is designed to deliver the scale, dynamics, and detail of a sophisticated hi-fi system from a single enclosure.

As the flagship of the Marantz Horizon wireless speaker family, Grand Horizon brings together the company's audio engineering heritage and a striking contemporary design. Its sculptural form, seamless 360° fabric covering, and intuitive AuraControl interface make it as much a carefully considered piece of furniture as a serious audio component. With HEOS Built-in, Apple AirPlay 2, Bluetooth, Spotify Connect, HDMI eARC, and extensive wired connectivity, Grand Horizon can serve as a complete music and entertainment system without requiring separate amplification or loudspeakers.

Marantz Rise Amplification

At the heart of Grand Horizon is Marantz Rise, a proprietary amplifier design employing gallium nitride field-effect transistors (GaN FETs). These devices can switch rapidly and efficiently, allowing the amplifier to deliver substantial power from a compact architecture while maintaining precise control of the loudspeaker drivers.

Grand Horizon delivers 370 W of total amplifier power under the FTC rating standard, with an advertised peak output of 860 W. Marantz also specifies 1,400 W of peak raw amplifier power, a figure describing the amplifier's potential peak capability rather than continuous acoustic output. The two peak figures are not measured under the FTC standard.

This powerful amplification system provides the headroom needed for demanding musical passages, helping Grand Horizon reproduce dynamic contrasts and deep bass without the limitations commonly associated with smaller wireless speakers.

Marantz's Sound Master tuning process further refines the speaker's performance through careful listening evaluations and adjustments to its amplification, driver integration, and digital processing. The result is intended to deliver the company's characteristic balance of musical detail, tonal richness, and spaciousness.

Eight-Driver Acoustic Architecture

Grand Horizon incorporates an eight-driver array engineered to reproduce a wide frequency range with substantial output and controlled dispersion. At its foundation is a single 8" Marantz Gravity bass driver, supported by four 3" wideband drivers and three 1" high-frequency drivers.

The Marantz Gravity drivers use powerful neodymium magnets to provide the magnetic force required for precise cone control. Their design is intended to combine strong dynamic performance with low distortion, even at elevated playback levels.

The 8" bass driver provides the low-frequency foundation, while the four wideband drivers handle much of the musical information through the midrange. Three high-frequency drivers reproduce upper-frequency detail and contribute to the speaker's broad sound dispersion.

This arrangement allows Grand Horizon to achieve a specified frequency response of 28 Hz to 20 kHz (±3 dB), extending to 18 Hz at -10 dB. Maximum sound pressure level is rated at 111 dB at 1 m, with peak output reaching 122 dB at the same distance.

The combination of dedicated drivers, substantial amplification, and carefully optimized processing allows Grand Horizon to deliver full-range sound from a single enclosure without relying on an external subwoofer.

Marantz Mirage Digital Signal Processing

Marantz Mirage is a proprietary digital signal processing system developed specifically for the Horizon speaker family. Rather than treating the multiple drivers as a conventional pair of stereo loudspeakers, Mirage DSP coordinates their output to produce a cohesive soundstage extending beyond the physical boundaries of the enclosure.

Digital processing manages the interaction between the bass, wideband, and high-frequency drivers, optimizing their contributions across the audible frequency range. This allows Grand Horizon to create a convincing sense of musical space while maintaining tonal balance and clarity.

The processing system also helps Grand Horizon maintain consistent performance across different listening levels and musical material, allowing the speaker to handle everything from intimate acoustic recordings to large-scale orchestral and electronic music.

With support for Dolby Atmos and other multichannel audio formats, Grand Horizon can also process immersive soundtracks and distribute their information across its eight-driver array. Although it remains a single-enclosure speaker rather than a discrete multichannel system, Mirage DSP is designed to create a more expansive presentation than its physical dimensions might suggest.

High-Resolution Music Streaming With HEOS

With HEOS Built-in, Grand Horizon provides convenient access to music streaming services, internet radio, and locally stored digital music. The HEOS app allows listeners to browse music, select sources, adjust volume, and control playback from a smartphone or tablet.

Supported streaming services include Amazon Music, TIDAL, Spotify, Pandora, Deezer, SiriusXM, iHeartRadio, TuneIn, SoundCloud, and others, with availability varying by region. HEOS also provides access to music stored on compatible network-attached storage devices and computers connected to the same network.

For listeners with their own digital music libraries, Grand Horizon supports high-resolution PCM playback up to 24-bit/192 kHz and DSD files at 2.8 MHz and 5.6 MHz. Supported formats include FLAC, ALAC, WAV, MP3, AAC, WMA, and DSD.

Apple AirPlay 2 makes it easy to stream directly from an iPhone, iPad, or Mac, while Bluetooth 5.4 provides a convenient wireless connection for compatible devices. Spotify Connect offers direct control of Spotify playback from the Spotify app.

USB-C storage playback provides another way to enjoy locally stored music without requiring a computer or network connection. Compatible FAT32- and NTFS-formatted storage devices can be connected directly to the speaker.

Multiroom Audio Made Simple

Grand Horizon can also be part of a larger HEOS multiroom audio system. Connect additional HEOS-enabled Marantz or Denon components throughout the home, and use the HEOS app to play different music in different rooms or synchronize playback across multiple listening areas.

This allows Grand Horizon to serve as the primary music system in a living room or other large space while smaller HEOS speakers provide music in bedrooms, offices, kitchens, or secondary listening areas.

Each zone can be controlled independently, with separate source selection and volume adjustment. Alternatively, multiple HEOS devices can be grouped together for synchronized music playback throughout the home.

Better TV Sound With HDMI eARC

Grand Horizon is equally capable as the centerpiece of a television audio system. Its HDMI eARC connection allows audio from a compatible television to be reproduced through the speaker, providing an alternative to a conventional soundbar or separate AV receiver and loudspeaker system.

Built-in decoding supports Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, and multichannel LPCM, allowing Grand Horizon to handle audio from television broadcasts, movies, games, and streaming video services.

The HDMI connection supports enhanced Audio Return Channel (eARC) and conventional ARC operation, allowing compatible televisions to send audio to the speaker through a single HDMI cable.

For multichannel sources, Grand Horizon supports PCM signals up to 24-bit/192 kHz across as many as 7.1 channels. Marantz Mirage processing then adapts the incoming material for reproduction through the speaker's integrated driver array.

An optical digital input provides an additional connection for compatible televisions, CD players, and other digital audio components.

Marantz AuraControl Interface

Grand Horizon features Marantz AuraControl, an integrated user interface designed to make everyday operation intuitive without compromising the speaker's appearance. Touch-sensitive controls provide convenient access to volume adjustment and playback functions, with multicolored LED illumination communicating operating status.

The controls are integrated into the speaker's distinctive design, avoiding the visual clutter of a conventional control panel. Volume adjustment, play/pause operation, and source control can also be managed through the HEOS app.

Dedicated connection and Bluetooth buttons on the rear panel simplify initial setup and wireless pairing.

This combination of onboard controls and app-based operation makes Grand Horizon suitable for both casual listening and more elaborate network audio systems.

Marantz Radiance 360° Seamless Fabric

The exterior of Grand Horizon features Marantz Radiance, a specially developed 360° seamless fabric covering. Designed to balance visual appearance, tactile quality, durability, and acoustic transparency, the material wraps around the speaker's sculptural enclosure without the conventional grille seams found on many loudspeakers.

The fabric is engineered to allow sound from the internal drivers to pass through with minimal obstruction while maintaining a consistent appearance from different viewing angles.

Marantz has also incorporated design elements inspired by its traditional hi-fi components, translating the company's recognizable visual identity into a new form intended for prominent placement within a living space.

Grand Horizon is available in three finishes: Midnight Sky, Moon Ray, and Marantz Champagne. Each finish presents a different interpretation of the speaker's combination of textured fabric, refined detailing, and sculptural form.

Flexible Connectivity and System Integration

Along with its extensive wireless capabilities, Grand Horizon provides a stereo RCA analog input for connecting conventional audio sources, an optical digital input, HDMI eARC/ARC, and a USB-C port for compatible storage devices.

Wired Ethernet and dual-band Wi-Fi provide flexible network connectivity. The wireless networking system supports IEEE 802.11a/b/g/n/ac/ax standards, allowing the speaker to connect to compatible modern wireless networks.

Grand Horizon also supports integration with popular custom installation control platforms, including Crestron, Control4, and AMX, through TCP/IP control.

Although Grand Horizon is designed to operate as a self-contained system, its extensive input and control options make it suitable for integration into more elaborate home entertainment installations.

A Complete High-Performance Music System

Grand Horizon brings together the major elements of a serious audio system in a single enclosure: amplification, loudspeaker drivers, digital signal processing, high-resolution streaming, digital-to-analog conversion, and source connectivity.

Its substantial bass capability, wide frequency response, and high output make it suitable for larger living spaces where a conventional compact wireless speaker may struggle to deliver convincing musical scale. At the same time, its unified design eliminates the need for separate amplifiers, loudspeaker cables, and component racks.

For listeners who want the convenience of an all-in-one system without surrendering the engineering ambition of traditional hi-fi, Grand Horizon represents Marantz's most ambitious approach to wireless speaker design.

Features

• Flagship Marantz wireless speaker with eight-driver acoustic architecture
• 370 W total FTC-rated amplifier power
• 860 W peak amplifier power (not FTC-rated)
• 1,400 W peak raw amplifier power (not FTC-rated)
• Proprietary Marantz Rise amplification using GaN FET technology
• One 8" Marantz Gravity bass driver with neodymium magnet
• Four 3" wideband drivers
• Three 1" high-frequency drivers
• Frequency response of 28 Hz–20 kHz (±3 dB), extending to 18 Hz (-10 dB)
• Maximum sound pressure level of 111 dB at 1 m
• Peak sound pressure level of 122 dB at 1 m
• Proprietary Marantz Mirage digital signal processing
• Marantz Sound Master tuning
• HEOS Built-in for high-resolution music streaming and multiroom audio
• Apple AirPlay 2, Bluetooth 5.4, and Spotify Connect
• High-resolution PCM playback up to 24-bit/192 kHz and DSD up to 5.6 MHz
• Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, and LPCM decoding
• HDMI eARC/ARC for television audio
• Optical digital input
• Stereo RCA analog input
• USB-C port for music playback from compatible storage devices
• Compatible with FAT32- and NTFS-formatted USB storage
• Network music library playback via UPnP and compatible network shares
• Marantz AuraControl touch-sensitive user interface
• Multicolored LED status indicator
• Marantz Radiance 360° seamless, acoustically transparent fabric covering
• Dual-band Wi-Fi 6 and wired Ethernet connectivity
• TCP/IP compatibility with Crestron, Control4, and AMX systems
• HEOS app control for iOS, Android, and Kindle Fire
• Available in Midnight Sky, Moon Ray, and Marantz Champagne finishes
• Distinctive sculptural enclosure designed for prominent room placement

What's Included

• Marantz Grand Horizon wireless speaker
• Power cable
• HDMI cable
• Quick start guide
• Certificate of authenticity

Specifications

Type: High-performance wireless streaming loudspeaker

Amplifier Design: Marantz Rise GaN FET

Total Amplifier Power (FTC): 370 W

Total Amplifier Power (Peak): 860 W (not tested under the FTC standard)

Total Raw Amplifier Power (Peak): 1,400 W (not tested under the FTC standard)

Driver Configuration: Eight drivers

Bass Driver: 1 × 8" Marantz Gravity

Wideband Drivers: 4 × 3"

High-Frequency Drivers: 3 × 1"

Driver Magnet Technology: Neodymium

Digital Signal Processing: Marantz Mirage DSP

Frequency Response (±3 dB): 28 Hz–20 kHz

Low-Frequency Extension (-10 dB): 18 Hz

Maximum Sound Pressure Level: 111 dB at 1 m

Peak Sound Pressure Level: 122 dB at 1 m

Analog Input: Stereo RCA

Digital Input: Optical (TOSLINK)

HDMI: 1 eARC/ARC

USB: USB-C for mass storage devices

USB Storage Formats: FAT32, NTFS

Supported Audio Formats: FLAC, ALAC, WAV, MP3, AAC, WMA, DSD

PCM Resolution (Stereo): Up to 24-bit/192 kHz

PCM Resolution (Multichannel): Up to 24-bit/192 kHz (7.1 channels)

DSD Support: 2.8 MHz, 5.6 MHz

Surround Audio Decoding: Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, LPCM

WMA Playback: Up to 192 kbps

AAC/MP3 Playback: Up to 320 kbps

FLAC/ALAC/WAV Playback: Up to 24-bit/192 kHz

Streaming: HEOS Built-in, Apple AirPlay 2, Bluetooth, Spotify Connect

Supported Music Services: Pandora, Spotify, TuneIn, SiriusXM, Amazon Music, TIDAL, iHeartRadio, Deezer, Deezer HiFi, Mood:Mix, Sony Hi-Res, AWA, QPlay, SoundCloud (availability varies by region)

Network Audio Playback: UPnP, network shares, compatible NAS devices

Bluetooth: Version 5.4

Wireless Networking: Dual-band Wi-Fi (2.4/5 GHz), IEEE 802.11a/b/g/n/ac/ax

Wired Networking: Ethernet

Control: Marantz AuraControl, HEOS app, TCP/IP third-party control

Third-Party Control Compatibility: Crestron, Control4, AMX

Onboard Controls: Volume up/down, play/pause, rear connection and Bluetooth buttons

Status Indicator: Multicolored LED

Exterior Material: Marantz Radiance 360° seamless, acoustically transparent fabric

Available Finishes: Midnight Sky, Moon Ray, Marantz Champagne

Dimensions (H × W × D): 19.41" × 10.04" × 20.83" (493 × 255 × 529.2 mm)

Weight: 46.9 lb.