KEF LS50 Wireless II Powered Bookshelf Speakers

Introduction

This manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of your KEF LS50 Wireless II Powered Bookshelf Speakers. Please read this manual thoroughly before using your speakers to ensure optimal performance and longevity.

The KEF LS50 Wireless II speakers are designed to deliver high-fidelity audio with versatile connectivity options. Key features include:

• Integrated amplification: Each speaker features a 280-watt amplifier for the midrange/bass driver and a 100-watt amplifier for the tweeter.
• Extensive wireless streaming: Supports Apple AirPlay 2, Google Chromecast, ROON Ready, UPnP Compatible, and Bluetooth 4.2.
• Wide range of streaming services: Access Spotify Connect, Tidal, Amazon Music, Qobuz, Deezer, QQ Music, Internet Radio, and Podcasts.
• High-resolution audio support: Up to 384kHz/24bit resolution, depending on the connection type.
• Multiple wired inputs: Includes HDMI eARC, TOSLINK Optical, Digital Coaxial, Analog 3.5mm Auxiliary, and RJ45 Ethernet.

Setup

Unpacking and Box Contents

Carefully unpack your KEF LS50 Wireless II speakers and ensure all components are present:

• 1 Pair LS50 Wireless II Speakers (Primary and Secondary)
• 1 Speaker Interconnect Cable
• 2X Power Cables
• Remote Control

Figure 1: KEF LS50 Wireless II Speakers (Mineral White)

Speaker Placement

For optimal sound performance, place the speakers on a stable, level surface. Consider using dedicated speaker stands or isolation pads to minimize vibrations. Ensure adequate space around the rear ports for proper bass response.

Figure 2: Example placement of KEF LS50 Wireless II speakers in a living room.

Connecting the Speakers

1. Interconnect Cable: Connect the supplied speaker interconnect cable between the Primary and Secondary speakers. This cable ensures high-resolution audio transmission between the two units.
2. Power Connection: Connect one power cable to the Primary speaker and the other to the Secondary speaker, then plug both into a suitable power outlet (120 Volts).

Figure 3: Rear panel of KEF LS50 Wireless II speakers with various input options.

Initial Configuration (KEF Connect App)

For full functionality and optimal sound customization, download the KEF Connect app on your smartphone or tablet. The app guides you through network setup, speaker pairing, and acoustic adjustments.

1. Download the KEF Connect app from your device's app store.
2. Follow the in-app instructions to connect your speakers to your Wi-Fi network and pair them.
3. Use the app to fine-tune speaker preferences, volume limits, and performance settings.

Figure 4: KEF Connect app interface for speaker control.

Operating

Powering On/Off and Controls

The speakers can be powered on/off via the KEF Connect app or the physical controls on the top of the Primary speaker. The included remote control also provides basic functions such as volume adjustment and source selection.

Figure 5: Top panel controls for power, volume, and source selection.

Connectivity Options

The LS50 Wireless II offers a wide array of connectivity options:

• Wireless Streaming: Connect via Apple AirPlay 2, Google Chromecast, ROON Ready, UPnP, or Bluetooth 4.2 for seamless audio playback from your devices or streaming services.
• HDMI eARC: Connect directly to your television for high-quality audio from TV shows, movies, and games.
• TOSLINK Optical: For digital audio connections from various sources like CD players or older TVs.
• Digital Coaxial: Another option for high-quality digital audio input.
• Analog 3.5mm Auxiliary: For connecting devices with a standard analog audio output.
• RJ45 Ethernet: For a stable wired network connection, ideal for high-resolution streaming.

Streaming Services

Access your favorite music and content directly through the KEF Connect app or compatible streaming platforms. Supported services include Spotify Connect, Tidal, Amazon Music, Qobuz, Deezer, QQ Music, Internet Radio, and Podcasts.

Maintenance

Cleaning

To maintain the appearance of your speakers, gently wipe surfaces with a soft, dry, lint-free cloth. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish. Do not apply excessive pressure to the Uni-Q driver or any other speaker components.

Environmental Considerations

Keep the speakers away from direct sunlight, heat sources, and excessive moisture. Ensure proper ventilation to prevent overheating. Avoid placing heavy objects on top of the speakers.

Troubleshooting Guide

If you encounter issues with your KEF LS50 Wireless II speakers, refer to the following common troubleshooting steps:

• No Sound: Check that both speakers are powered on and the power cables are securely connected. Verify the source selection in the KEF Connect app or via the remote. Ensure the volume is not muted or set too low.
• Connectivity Issues: For Wi-Fi, ensure your router is functioning correctly and the speakers are within range. For Bluetooth, ensure the speakers are in pairing mode and your device's Bluetooth is enabled. Try restarting both the speakers and the source device.
• Distorted Audio: Check the audio source for quality issues. Reduce the volume to see if distortion persists. Ensure speaker cables are securely connected and not damaged.
• App Not Connecting: Ensure your smartphone/tablet is on the same Wi-Fi network as the speakers. Try restarting the app and the speakers.
• Speaker Interconnect: If using the wired inter-speaker connection, ensure the cable is firmly seated in both the Primary and Secondary speakers.

For persistent issues, consult the KEF Connect app's help section or the official KEF support website.

Technical Specifications

Warranty Information and Support

Warranty

The KEF LS50 Wireless II speakers come with a Limited Warranty. Please refer to the warranty documentation included in your product packaging for specific terms and conditions. Retain your proof of purchase for warranty claims.

Customer Support

For further assistance, technical support, or to register your product, please visit the official KEF website or contact KEF customer service directly. Contact information can typically be found on the KEF website or in your product's packaging.