Yamaha Audio WX-021BL
Yamaha MusicCast 20 Wireless Speaker Instruction Manual
Model: WX-021BL
1. Introduction
The Yamaha MusicCast 20 Wireless Speaker is designed to enhance your audio experience, whether for music or home theater. Its compact and versatile design allows it to fit seamlessly into any space and decor, including wall-mounting. It can be paired with another MusicCast 20 speaker for powerful wireless stereo sound or integrated into a MusicCast multi-room setup for whole-home audio. Voice control is available through Alexa-enabled devices, offering convenient operation.
Key Features:
- Versatile placement: Fits any space and style of room, including wall-mountable options.
- Multiple streaming options: Stream music via Wi-Fi, Bluetooth, AirPlay, or Spotify Connect.
- Multi-room audio: Seamlessly integrates with MusicCast stereo or multi-room systems, controllable via the MusicCast app for iOS and Android.
- Home theater integration: Can be added as wireless surround speakers to a MusicCast surround-capable AV receiver for a 5.1-channel home theater system.
- Voice control: Compatible with Alexa through any Echo device for hands-free operation.
2. What's in the Box
- Yamaha MusicCast 20 Wireless Speaker
- Power Cable
- Instruction Manual (this document)

Figure 1: Front view of the Yamaha MusicCast 20 Wireless Speaker.
3. Setup
3.1 Initial Placement
Place the MusicCast 20 speaker in your desired location. It can be placed on a flat surface, such as a nightstand or bookshelf, or wall-mounted using the threaded connection on the back. Ensure it is within range of your Wi-Fi network for optimal performance.

Figure 2: Speaker placed on a nightstand, demonstrating versatile placement.

Figure 3: Rear view of the speaker, highlighting the threaded connection for mounting and power input.
3.2 Power Connection
Connect the provided power cable to the power input port located at the bottom rear of the speaker. Plug the other end into a standard electrical outlet. The power indicator light on the top panel will illuminate.
3.3 Network Setup (Wi-Fi)
- Download the MusicCast Controller app on your iOS or Android device from the App Store or Google Play Store.
- Open the MusicCast Controller app and follow the on-screen instructions to add a new device.
- The app will guide you through connecting the MusicCast 20 to your home Wi-Fi network.
- Once connected, the Wi-Fi indicator light on the top panel will confirm the connection.
Note: An Ethernet port is available on the rear for a wired connection, but it is not required for operation.
4. Operating Instructions
4.1 Using the MusicCast App
The MusicCast Controller app is the primary interface for managing your speaker and music. Through the app, you can:
- Browse and play music from various streaming services (e.g., Spotify Connect).
- Control volume and playback.
- Manage multiple MusicCast devices for multi-room audio.
- Create stereo pairs or integrate with a MusicCast AV receiver for surround sound.
- Access advanced settings and equalizer adjustments.

Figure 4: Top panel with touch controls for power, volume, and presets.
4.2 Voice Control with Alexa
The MusicCast 20 is compatible with Amazon Alexa. To enable voice control:
- Ensure your MusicCast 20 speaker is connected to your Wi-Fi network.
- Open the Amazon Alexa app on your mobile device.
- Enable the "MusicCast" skill within the Alexa app.
- Follow the instructions to link your MusicCast account with Alexa.
- You can now use voice commands through any Alexa-enabled device (e.g., Echo Dot) to control your MusicCast 20 speaker.
Example commands: "Alexa, play jazz in the living room" (if your speaker is named "living room").
4.3 Bluetooth Connectivity
To connect a Bluetooth device:
- Press and hold the Bluetooth button on the top panel of the MusicCast 20 until the Bluetooth indicator light flashes.
- On your mobile device, go to Bluetooth settings and select "MusicCast 20" from the list of available devices.
- Once paired, the Bluetooth indicator light will remain solid.
Bluetooth Version/Profile: Ver. 4.2 EDR / A2DP, AVRCP (Bluetooth is compatible with SCMS-T.). Audio Codec: SBC, AAC (receiving only). Maximum Communication Range: 32 feet (without interference).
5. Maintenance
To ensure the longevity and optimal performance of your Yamaha MusicCast 20 speaker, follow these maintenance guidelines:
- Cleaning: Gently wipe the speaker's surface with a soft, dry cloth. Do not use liquid cleaners, aerosols, or abrasive materials, as they may damage the finish or internal components.
- Placement: Avoid placing the speaker in direct sunlight, near heat sources, or in excessively humid or dusty environments. Ensure adequate ventilation around the unit.
- Power: Disconnect the power cable from the outlet if the speaker will not be used for an extended period.
- Handling: Handle the speaker with care. Avoid dropping it or subjecting it to strong impacts.
The speaker is not waterproof and should not be exposed to water or excessive moisture.
6. Troubleshooting
If you encounter issues with your MusicCast 20 speaker, refer to the following common solutions:
| Problem | Possible Cause / Solution |
|---|---|
| No Power |
|
| No Sound |
|
| Cannot Connect to Wi-Fi |
|
| Music Playback Interruption |
|
For more detailed troubleshooting, please refer to the official Yamaha support website or the comprehensive user manual PDF available online.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | WX-021BL |
| Speaker Type | Multi Room |
| Special Feature | Stereo pairing; Radio |
| Recommended Uses For Product | Music, Home Theater |
| Compatible Devices | Home Theater |
| Unit Count | 1.0 Count |
| Controller Type | Amazon Alexa |
| Surround Sound Channel Configuration | 5.1 |
| Color | Black |
| Included Components | manual, Speaker |
| Product Dimensions | 5.2"D x 5.9"W x 7.9"H |
| Item Weight | 4.8 Pounds |
| Is Waterproof | FALSE |
| Warranty Type | Manufacturer Warranty |
| Maximum Range (Bluetooth) | 32 Feet |
| Number of Items | 1 |
| Control Method | Voice |
| Wireless Communication Technology | Bluetooth, Wi-Fi |
| Speaker Size | 20.07 Centimeters |
| Power Source | AC |
| Woofer Diameter | 8.89 Centimeters |
| Water Resistance Level | Not Water Resistant |
| Audio Driver Type | Dynamic Driver |
| Subwoofer Connectivity Technology | Wireless |
| Connectivity Protocol | Bluetooth, Wi-Fi |
| Speaker Maximum Output Power | 4 Watts |
| Audio Output Mode | Stereo |
| Mounting Type | Wall Mount |

Figure 5: Product dimensions for the MusicCast 20 speaker.
8. Warranty and Support
The Yamaha MusicCast 20 Wireless Speaker comes with a Manufacturer Warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Yamaha Audio website.
For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact Yamaha Audio customer support or visit their official website. You can also find a comprehensive User Manual (PDF) for this product at this link.
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