KEF LS50 Wireless II Active Bookshelf HiFi Loudspeakers
The $2799.99 KEF LS50 Wireless II active bookshelf loudspeakers [product link] [YouTube playlist] [in Carbon Black, Titanium Grey, Mineral White, or Crimson Red Special Edition at Amazon] are pictured below in Crimson Red. You can also buy optional matching $449.99 KEF S2 floor stands [product link] [at Amazon] made of steel and aluminum with mounting holes and fillable tube structure (inert filler sold separately) to conceal cables and place the speakers at the ideal listening height. Stands are 25.7″ tall. The speakers themselves measure 12″ high, 7.9″ wide, 12.2″ deep, and weigh about 22 pounds each.
The 12th generation Uni-Q driver array features a 1″ vented aluminum dome tweeter with Metamineral Absorption Technology (a maze-like structure which absorbs 99% of the unwanted sound from the rear of the tweeter) powered by a 100-watt Class AB amplifier and a 5¼” aluminum cone woofer powered by a 280-watt Class D amplifier, and the speakers are rear ported. That’s 380 watts total amplification providing power for each speaker.
Inputs on the primary speaker include HDMI eARC for direct connection to your television or UST projector, TOSLINK optical, digital coaxial, analog 3.5mm auxiliary, USB Type A for service, RJ45 Ethernet jack for connection to your network router (max source resolution is 384kHz/24bit), and a second RJ45 Ethernet jack to connect directly to the other speaker if you prefer to use the included interspeaker cable to take advantage of hard-wired 192kHz/24bit PCM instead of wireless 96kHz/24bit PCM. Each speaker has a subwoofer output.
Frequency response is rated from 45Hz to 28kHz ±3dB measured at 85dB/1m, and maximum SPL is 108dB. Surely, you are going to want to consider adding an optional powered subwoofer to extend the bass response. For example, the compact and powerful $1499.99 wireless-capable (with optional KW1 adaptor kit) KEF KC62 subwoofer [product link] [in Carbon Black, Titanium Grey, or Mineral White at Amazon] features dual 6½” Uni-Core Force Cancelling woofers powered by 1000 watts RMS to deliver an amazing frequency response of 11Hz to 200Hz ±3dB with a maximum output of 105dB, from a cabinet measuring about 10″ cubed!
Streaming protocols supported on the KEF LS50 Wireless II speakers are the latest Wi-Fi standards and Bluetooth 4.2, as well as Apple AirPlay 2 and Google Chromecast. They are also UPnP (Universal Plug and Play) compatible and Roon ready. Supported streaming services available using the KEF Connect App are Spotify, Tidal, Amazon Music, Qobuz, Deezer, and QQ Music, as well as Internet Radio and Podcasts.
A simple remote control with batteries is included, as well as the two power cords, an interspeaker Ethernet cable, and the Quick Start Guide and warranty information.
Where To Buy You can purchase your KEF LS50 Wireless II active bookshelf speakers in your choice of four colors directly from KEF or at Amazon.com.