Marantz HORIZON/U1B
Marantz Horizon Wireless Speaker with HEOS Built-in User Manual
Model: HORIZON/U1B
1. Introduction
The Marantz Horizon is a luxury wireless speaker designed to deliver a premium audio experience with elegant aesthetics. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your device to ensure optimal performance and longevity.
Key Features:
- Premium Marantz Audio Experience
- Elegant Luxury Design with Natural Marble Base
- Auracontrol Technology for precise sound management
- Radiance 360 Sound Projection for immersive audio
- Rise Amplifier for powerful sound output
- Gravity Drivers for deep bass and immersive sound
- HEOS Built-in for multi-room audio and streaming
- Integrated Amazon Alexa control

Figure 1: Front view of the Marantz Horizon speaker, showcasing its elegant design and illuminated control ring.
2. Setup
2.1 Unpacking
Carefully remove the speaker and its accessories from the packaging. Ensure all components are present: the Marantz Horizon speaker, power cord, and the natural marble base. Retain packaging for future transport or service.
2.2 Placement
Place the Marantz Horizon speaker on a stable, flat surface, such as a tabletop. The speaker is designed for tabletop mounting. For optimal sound dispersion, position the speaker in a central location within your listening area, away from obstructions. The speaker dimensions are approximately 15.26"D x 8.27"W x 14.33"H.

Figure 2: Marantz Horizon speaker placed on a surface, illustrating its aesthetic integration into a room.
2.3 Power Connection
- Connect the provided power cord to the AC inlet on the back of the speaker.
- Plug the other end of the power cord into a suitable wall outlet.

Figure 3: Rear view of the Marantz Horizon speaker, highlighting the power input and other connection ports.
2.4 Initial Power On and Network Setup
- Once powered, the speaker will enter setup mode.
- Download the HEOS app on your smartphone or tablet from the App Store or Google Play Store.
- Open the HEOS app and follow the on-screen instructions to connect your Marantz Horizon speaker to your home Wi-Fi network. The speaker supports Wi-Fi, Bluetooth, and Ethernet connectivity.
- During setup, you can also configure Amazon Alexa for voice control.
3. Operating Instructions
3.1 Basic Controls
The Marantz Horizon features intuitive touch controls located on the speaker's surface. Refer to the HEOS app for comprehensive control and settings adjustments.
3.2 Connecting Devices
The speaker supports wireless connectivity via Wi-Fi and Bluetooth. It is compatible with various devices including laptops, projectors, smartphones, tablets, and televisions.
- Wi-Fi: Use the HEOS app to stream music from online services or your local network.
- Bluetooth: Activate Bluetooth on your source device and select "Marantz Horizon" from the list of available devices to pair.
- Ethernet: For a stable wired connection, connect an Ethernet cable from your router to the speaker's Ethernet port.
3.3 HEOS Built-in Features
The HEOS app unlocks the full potential of your Marantz Horizon speaker:
- Multi-Room Audio: Group multiple HEOS-enabled devices to play the same music in perfect synchronization or different music in different rooms.
- Music Streaming: Access popular music streaming services directly through the app.
- High-Resolution Audio: Enjoy high-resolution audio playback for superior sound quality.
- Auto Speaker Setup: Utilize the app for automatic speaker calibration to optimize sound for your room.
3.4 Amazon Alexa Voice Control
Once configured through the HEOS app, you can use Amazon Alexa to control your Marantz Horizon speaker with voice commands. For example, "Alexa, play jazz music on Marantz Horizon."
4. Maintenance
4.1 Cleaning
To maintain the appearance of your Marantz Horizon speaker, follow these guidelines:
- Speaker Body (Metal, Wood): Use a soft, dry cloth to gently wipe the surfaces. Avoid abrasive cleaners or solvents.
- Marble Base: Wipe with a soft, damp cloth. For stubborn marks, use a mild, pH-neutral cleaner specifically designed for natural stone. Dry immediately with a clean cloth. Avoid acidic or harsh chemicals.
- Do not spray cleaning liquids directly onto the speaker.
4.2 General Care
- Avoid exposing the speaker to direct sunlight, extreme temperatures, or high humidity.
- Do not place heavy objects on the speaker.
- Ensure proper ventilation around the speaker to prevent overheating.
5. Troubleshooting
If you encounter issues with your Marantz Horizon speaker, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord disconnected; outlet malfunction | Ensure power cord is securely connected to both speaker and wall outlet. Test outlet with another device. |
| No sound | Volume too low; incorrect input source; speaker muted | Increase volume. Verify correct input source in HEOS app. Check if speaker is muted. |
| Cannot connect to Wi-Fi | Incorrect Wi-Fi password; router issues; speaker too far from router | Re-enter Wi-Fi password in HEOS app. Restart your router. Move speaker closer to router or use an Ethernet connection. |
| Bluetooth pairing failure | Bluetooth not enabled on source device; speaker already paired to another device | Ensure Bluetooth is active on your device. Disconnect from other Bluetooth devices. Try pairing again. |
| Alexa not responding | Microphone muted; network issue; Alexa not configured | Check if the microphone is active. Verify network connection. Reconfigure Alexa in the HEOS app. |
5.1 Factory Reset
If issues persist, a factory reset may resolve them. Refer to the HEOS app or Marantz support website for specific instructions on performing a factory reset for your model, as this will erase all settings and network configurations.
6. Specifications
Below are the technical specifications for the Marantz Horizon Wireless Speaker (Model: HORIZON/U1B):
| Feature | Specification |
|---|---|
| Brand | Marantz |
| Model Number | HORIZON/U1B |
| Speaker Maximum Output Power | 745 Watts |
| Connectivity Technology | Wireless (Wi-Fi, Bluetooth, Ethernet) |
| Audio Output Mode | Stereo (3.1 Channels) |
| Mounting Type | Tabletop Mount |
| Enclosure Material | Metal, Wood, Marble (Base) |
| Speaker Type | Single Speaker |
| Additional Features | Bass Boost, Hi-Res Audio, Multi-Room Audio, Auto Speaker Setup, Network Ready |
| Controller Type | Amazon Alexa, Touch |
| Color | Midnight Sky |
| Speaker Size | 14.33 Inches (Height) |
| Item Dimensions (D x W x H) | 15.26" x 8.27" x 14.33" |
| Power Source | Corded Electric |
| Compatible Devices | Laptop, Projector, Smartphone, Tablet, Television |
| UPC | 747192141295 |
| Audio Driver Type | Dynamic Driver |
7. Warranty and Support
7.1 Warranty Information
The Marantz Horizon Wireless Speaker comes with a 5-year manufacturer's limited warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For full terms and conditions, refer to the warranty documentation included with your product or visit the official Marantz website.
7.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty service, please contact Marantz customer support. You can find contact information on the official Marantz website or in the product registration materials.
- Online Support: Visit the Marantz support website for FAQs, software updates, and additional resources.
- Phone Support: Contact the dedicated customer service line for direct assistance.
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