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KEF LS50 Wireless II Review
KEF LS50 Wireless II

Main Features

  • 12th Generation Uni-Q Driver
  • 1" Hard-Dome Tweeter
  • 5.25" Aluminum Woofer
  • 45-28k Hz Frequency Response
  • 380-watt RMS( 760-watt Peak) Integrated Amplifier
  • 32-bit Max Depth / 384 kHz Max Sample Rate
  • Built-in 4.2 Bluetooth
  • Weight:22.00 lbs
  • Dimensions (H x W x D): 10.9375" x 7.875" x 12.6875"
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KEF LS50 Wireless II Review

KEF LS50 Wireless II is a 2-way Powered Bass Reflex Bookshelf speaker by KEF. LS50 Wireless II's built-in amplifier provides 380-watt RMS( 760-watt Peak). The built-in power amplifier saves space & eliminates the need to connect KEF LS50 Wireless II to a stereo receiver or external power amp. It features a 1" Hard-Dome Tweeter and 1 x 5.25" Aluminum Woofer. The speaker has a frequency range of 45-28k Hz. KEF LS50 Wireless II has an MSRP of 2800$ per pair but can often be found around 2300$ per pair.

KEF replaced the older LS50 Wireless with this model. Follow the link to read our detailed comparison of these models:
Compare KEF LS50 Wireless II vs KEF LS50 Wireless

What are the speakers in KEF's LS Series?

LS50 Wireless II is a member of KEF's LS series of Powered speakers. Below you can see the main specs of these speakers.

KEF LS Series Speakers
Model Frequency Watts RMSMax Depth / Sample Rate Woofer
KEF LS60 Wireless
Compare
31-24k Hz 1400-watt24-bit/384 kHzΩ 4 x 5.25"
KEF LSX II
Compare
49-47k Hz 200-watt24-bit/384 kHzΩ 1 x 4.5"
KEF LS50 Wireless II
45-28k Hz 380-watt32-bit/384 kHzΩ 1 x 5.25"
KEF LS50 Wireless
Compare
79-28k Hz 230-watt24-bit/192 kHzΩ 1 x 5.25"
KEF LSX
Compare
59-28k Hz 200-watt24-bit/96 kHzΩ 1 x 4.5"


**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

What is the Frequency Response of the KEF LS50 Wireless II speaker?

KEF LS50 Wireless II has a Frequency response range of 45-28k Hz. At a minimum frequency of 45 Hz, LS50 Wireless II will provide an average bass depth so depending on your use case, you may consider supplementing your system with a subwoofer.

To focus on the subwoofers that are in a similar price range with KEF LS50 Wireless II, check the Powered Subwoofers under $3000. Alternatively, find the Full list of Powered Subwoofers regardless from the price.
Here we have a comparison of how LS50 Wireless II's Low and High frequency values compared with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
KEF LS50 Wireless II
Min
Average
Max
High Frequency
Bookshelf Speakers
KEF LS50 Wireless II
Min
Average
Max

Among the speakers in our database with a max MSRP price of 3000$ (Pair), these are the 5 Powered Bookshelf speakers that have the deeper bass levels than the KEF LS50 Wireless II's 45Hz:

  • Fluance Ai61 with Low Frequency of 32 Hz (Compare w/ LS50 Wireless II)
  • Fluance Ai41 with Low Frequency of 35 Hz (Compare w/ LS50 Wireless II)
  • Dynaudio Xeo 20 with Low Frequency of 40 Hz (Compare w/ LS50 Wireless II)
  • SVS Prime Wireless Pro with Low Frequency of 42 Hz (Compare w/ LS50 Wireless II)
  • ELAC Navis ARB-51 with Low Frequency of 44 Hz (Compare w/ LS50 Wireless II)


KEF LS50 Wireless II Back View
KEF LS50 Wireless II Back View

Handheld Remote

KEF LS50 Wireless II comes with a handheld remote which is obviously very useful to control your powered speakers from a distance.

Bluetooth Connectivity

KEF LS50 Wireless II employs Built-in 4.2 Bluetooth for wireless music streaming from your Bluetooth-enabled devices such as Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows PC, Mac computers/laptops. LS50 Wireless II can playback up to 32-bit / 384 kHz with compatible devices.

KEF LS50 Wireless II supports the following Bluetooth Codecs when used with supported devices:

  • aptX

Supported Streaming Services

KEF LS50 Wireless II supports the following Streaming Services:

  • Spotify via Spotify Connect
  • Tidal
  • Amazon Music
  • Qobuz
  • Deezer
  • QQ Music via QPlay
  • Internet Radio
  • Podcast

Supported Wireless Streaming System

KEF LS50 Wireless II supports the following wireless streaming methods:

  • AirPlay 2
  • Google Chromecast
  • ROON Ready
  • UPnP Compatible
  • Bluetooth 4.2

App-Based Control

KEF LS50 Wireless II can be controlled wirelessly via KEF Connect application available on Apple iOS and Android.

Inputs and Outputs

  • 3.5mm Minijack Input
  • USB Port: Service only
  • Wired Subwoofer Output
  • Digital Input: Optical, Coax
  • HDMI Input: eARC
  • Ethernet Port

KEF LS50 Wireless II Connections
KEF LS50 Wireless II Connections

KEF LS50 Wireless II External Dimensions and Weight

KEF LS50 Wireless II has external dimensions of (Height x Width x Depth) 10.9375 x 7.875 x 12.6875inch (277.8 x 200.0 x 322.3mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of KEF LS50 Wireless II is approximately 644.6cm2 / 99.9inch2.

To have a better perspective on the real life size of KEF LS50 Wireless II, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

KEF LS50 Wireless II Real Life Body Size Comparison
KEF LS50 Wireless II Speaker Size Compared to a Compact Disc

Here we place the KEF LS50 Wireless II virtually next to a standard width amplifier and turntable on a BDI Octave Media Cabinet to get a better idea about the size.

KEF LS50 Wireless II placed next to an amplifier and turntable
KEF LS50 Wireless II Speaker next to an amplifier and turntable

Weight

The speaker with the built-in amplifier weighs 10.20kg / 22.4lbs whereas the other speaker weighs 10.00kg/ 22lbs. Here is a comparison of how LS50 Wireless II's weight compared with the average, max and min weights in its class.

Weight
All Bookshelf Speakers
KEF LS50 Wireless II
Min
Average
Max
Weight
Bookshelf Speakers under $3000
KEF LS50 Wireless II
Min
Average
Max

Cabinet type and Materials

KEF LS50 Wireless II has a Bass Reflex type cabinet. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.

Port Position

KEF LS50 Wireless II is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.

Wall Mounting

LS50 Wireless II doesn't sport any built-in mounting bracket so you need an external structure to mount on walls.

Speaker Stands

KEF sells a dedicated speaker stand for the LS50 Wireless II with a model name KEF S2. You can check the latest price and availability of these stands at B&H PHOTO and Amazon.

KEF S2 for KEF LS50 Wireless II
KEF S2 Speaker Stands for KEF LS50 Wireless II

What's in the Box of KEF LS50 Wireless II?

Here are the items that are included inside the box of LS50 Wireless II:
  • 2 Wireless powered speakers
  • Two 6.5-feet AC power cords
  • 10-feet Cat-6 interconnect speaker cable
  • Remote control
  • 2 AAA batteries
  • Quick Start Guide
  • Important Safety Information
  • Warranty Information
  • User's Manual

    For more information about how to setup, use and maintain the KEF LS50 Wireless II, use the direct link below to download the official manual document:
    Download User Manual for KEF LS50 Wireless II

    Official Product Page

    Official manufacturer's product page for the KEF LS50 Wireless II speaker can be found below:
    Official Product Page for KEF LS50 Wireless II

    Warranty

    1 Year of parts warranty and 1 Year of labor warranty is generally provided by the manufacturer.

    KEF LS50 Wireless II Alternatives in Powered Bookshelf Speakers
    Model Type Watts RMS Bluetooth Frequency
    Buchardt A500
    Compare
    3-way 450w No 25-40k Hz
    ELAC Navis ARB-51
    Compare
    3-way 300w Optional 44-28k Hz
    Dynaudio Xeo 20
    Compare
    2-way 260w Built-in 4.1 40-21k Hz
    Genelec G Four
    Compare
    2-way 180w No 48-20k Hz
    Genelec G Five
    Compare
    2-way 270w No 34-20k Hz
    Frequently Asked Questions about KEF LS50 Wireless II
    What is the External Dimensions of KEF LS50 Wireless II


    KEF LS50 Wireless II Detailed Specifications

    General
    BrandKEF
    Full Model NameKEF LS50 Wireless II
    Speaker Type2-way Bookshelf
    Max SPL108 dB
    Frequency Response45-28k Hz
    Amplifier Specs
    Watts RMS380 watts
    Watts Max760 watts
    TypeClass D
    DAC Specs
    Max Digital Audio Bit Depth32-bit
    Max Digital Audio Sample Rate384 kHz
    DRIVERS
    Woofer Size5.25-inch
    Woofer CompositionAluminum
    Woofer SurroundRubber
    Tweeter Size1-inch
    Tweeter TypeHard-Dome
    Port Positionrear
    DIGITAL ECOSYSTEM
    Control by AppApple iOS, Android
    App NameKEF Connect
    Amazon AlexaNo
    Google AssistantOptional
    Streaming ServicesSpotify via Spotify Connect
    Tidal
    Amazon Music
    Qobuz
    Deezer
    QQ Music via QPlay
    Internet Radio
    Podcast
    Wireless StreamAirPlay 2
    Google Chromecast
    ROON Ready
    UPnP Compatible
    Bluetooth 4.2
    Multi-room StreamingYes
    Subwoofer OutputWired

    CONNECTIONS
    Ethernet PortYes
    USB PortService only
    Aux Input3.5mm
    Phono InputNo
    Digital InputOptical, Coax
    HDMI InputeARC
    Headphone JackNo
    BluetoothBuilt-in 4.2
    Bluetooth CodecaptX
    Wi-Fi802.11ac
    Wi-Fi Bands802.11ac
    Wi-Fi Bands2.4, 5 GHz
    Port Positionrear
    PHYSICAL SPECS
    Height277.8mm ( 10.9375-inch)
    Width200.0mm ( 7.875-inch)
    Depth322.3mm ( 12.6875-inch)
    Height277.8mm ( 10.9375-inch)
    Weight10.00kg ( 22.00 lbs)
    EnclosureBass Reflex
    Mounting BracketNo
    Moisture ResistanceNo
    OTHER
    Handheld RemoteYes
    Parts Warranty1 Year
    Labor Warranty1 Year
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