Description:
General Description
The MARANTZ GRAND HORIZON U1LG is the Moon Ray version of the flagship Grand Horizon wireless system. Designed to resolve high-fidelity music, multi-room streaming, and television audio in a single unit with a strong aesthetic presence, it integrates eight transducers, high-power amplification, and today's leading connectivity platforms. Its Moon Ray finish provides a bright and sophisticated alternative for contemporary interiors, premium residential spaces, and interior design projects seeking an audio component with its own unique identity.
Inside, the Grand Horizon combines an 8-inch Marantz Gravity bass driver, four 3-inch full-range transducers, and three 1-inch tweeters. The ensemble is powered by Marantz Rise GaN FET amplification, with 370 W of total power measured under FTC standards. Its frequency response extends from 28 Hz to 20 kHz within ±3 dB, reaches 18 Hz at -10 dB, and delivers up to 111 dB of maximum SPL at one meter. This architecture, along with the Gravity Drivers' neodymium magnets and Marantz Mirage DSP, is designed to create deep bass, punchy dynamics, and a soundstage that is perceived beyond the physical dimensions of the cabinet.
The GRAND HORIZON U1LG includes HEOS for streaming and multi-room, Ethernet or Wi-Fi connection, Bluetooth 5.4, AirPlay 2, and Spotify Connect. Its HDMI eARC/ARC input allows for integration with a television with support for formats such as Dolby Atmos and Dolby TrueHD, while RCA, TOSLINK optical, and USB-C inputs make it easy to connect analog sources, digital devices, and music libraries. AuraControl, the front touch ring, and the multicolor halo allow for direct, refined, and intuitive operation.
Technical Specifications
| PRODUCT IDENTIFICATION | |
|---|---|
| Brand | Marantz |
| Model | GRAND HORIZON U1LG |
| Product Name | Marantz Grand Horizon |
| Type | Flagship wireless speaker with HEOS Built-in |
| Finish of this version | Moon Ray |
| AMPLIFICATION | |
| Amplification topology | Marantz Rise GaN FET |
| Total FTC power | 370 W (FTC measurement) |
| Total peak power | 860 W (not evaluated under FTC standard) |
| Gross peak amplifier power | 1400 W (not evaluated under FTC standard) |
| TRANSDUCER ARRAY | |
| Bass driver | 1x 8" Marantz Gravity |
| Full-range transducers | 4x 3" |
| High-frequency tweeters | 3x 1" |
| Gravity Driver magnets | Neodymium |
| Total number of transducers | 8 |
| ACOUSTIC PERFORMANCE | |
| Frequency response | 28 Hz - 20 kHz (±3 dB) |
| Bass extension | 18 Hz (-10 dB) |
| Maximum SPL | 111 dB at 1 meter |
| Peak SPL | 122 dB at 1 meter |
| Digital processing | Marantz Mirage DSP |
| AUDIO CONNECTIVITY | |
| HDMI input | 1x HDMI eARC / ARC |
| Digital optical input | 1x TOSLINK |
| Analog input | 1x Stereo L/R RCA |
| Maximum analog input level | 2 Vrms |
| USB port | 1x USB-C for mass storage units |
| Optical input audio | 2-channel linear PCM: 32 - 192 kHz; Dolby Digital bitstream |
| HDMI audio | Stereo linear PCM up to 192 kHz; 7.1 multichannel PCM up to 192 kHz; Dolby Digital, Dolby Digital+, Dolby TrueHD, and Dolby Atmos |
| AUDIO FORMATS | |
| Decoding | Dolby Atmos, Dolby TrueHD, DSD, Dolby Digital+, Dolby Digital, and LPCM |
| Maximum PCM | Stereo: 192 kHz / 24-bit; multichannel: 192 kHz / 24-bit (up to 7.1 channels) |
| Maximum DSD | 5.6 MHz (DSD x2) |
| Files via HEOS network or USB | WMA up to 192 kbps; AAC and MP3 up to 320 kbps; WAV, ALAC, and FLAC up to 24-bit / 192 kHz; DSD 2.8 MHz and 5.6 MHz |
| Compatible USB storage | FAT32 and NTFS drives |
| STREAMING AND MULTIROOM AUDIO | |
| Integrated platform | HEOS |
| Multiroom audio | Yes; the HEOS system supports up to 32 HEOS Built-in devices |
| AirPlay | AirPlay 2 |
| Spotify | Spotify Connect |
| Compatible HEOS services | Including, among others: Spotify, TuneIn, Amazon Music, TIDAL, Deezer, iHeartRadio, SiriusXM, Pandora, and SoundCloud; availability varies by country and service |
| Mobile device playback | Yes; iOS, Android, and Kindle Fire via HEOS |
| Network library | Yes, NAS and UPnP |
| NETWORK AND WIRELESS CONNECTIVITY | |
| Ethernet | Yes |
| Wi-Fi | IEEE 802.11a/b/g/n/ac/ax; 2.4, 5, and 6 GHz bands |
| Bluetooth | Bluetooth 5.4, Class 1 |
| Bluetooth profiles | A2DP and AVRCP |
| Bluetooth codec | SBC |
| Maximum Bluetooth range | Approximately 30 m in line of sight |
| Network configuration | HEOS, WPS, Apple WAC, or Ethernet |
| CONTROL AND INTEGRATION | |
| Control app | HEOS for iOS, Android, and Kindle Fire |
| Touch controls | Volume ring; play/pause, skip forward/backward |
| Status indicator | Multicolor front halo |
| AuraControl | Yes |
| IP control compatibility | TCP/IP with Crestron, Control4, and AMX |
| DESIGN AND CONSTRUCTION | |
| Outer fabric | Marantz Radiance 360° Seamless Fabric |
| Fabric property | Acoustically transparent |
| Positioning | Marantz flagship wireless speaker |
| POWER AND OPERATION | |
| Power (North America version) | 100 - 120 V AC, 50/60 Hz |
| Power (Europe version) | 100 - 240 V AC, 50/60 Hz |
| Power consumption | 120 W |
| Auto Standby consumption | 1.7 - 2.0 W depending on connection and configuration |
| Auto standby | After 20 minutes of inactivity, depending on input source |
| Operating temperature | 5 °C - 35 °C |
| Wi-Fi/Bluetooth deactivation | Yes, via the HEOS app |
| DIMENSIONS AND WEIGHT | |
| Dimensions (H x W x D) | 493 x 255 x 529.2 mm (19.41 x 10.04 x 20.83") |
| Weight | 21.3 kg (46.9 lb) |
| BOX CONTENTS | |
| Marantz Grand Horizon speaker | 1 unit |
| HDMI cable | Included |
| Power cable | Included according to region |
| Certificate of authenticity | Included |
| Documentation and rear cover | Included |
| Sale | Per unit |
Ideal for
The MARANTZ GRAND HORIZON U1LG Moon Ray is ideal for premium audio systems in large living rooms, social areas, luxury apartments, creative studios, boutique hotels, reception areas, and residential projects where light or elegant decor is an essential part of the installation. Its 370 W FTC capacity, 8-inch bass driver, and eight transducers allow for solid and expansive reproduction without the use of external amplifiers or speakers. It is especially suitable for users who want to connect TV audio via HDMI eARC/ARC with high-resolution streaming, HEOS multi-room, AirPlay 2, Spotify Connect, Bluetooth, and analog or digital sources connected directly to the speaker.