KEF LSX II is a 2-way Powered Bass Reflex Bookshelf speaker by KEF. LSX II's built-in amplifier provides 200-watt RMS. The built-in power amplifier saves space & eliminates the need to connect KEF LSX II to a stereo receiver or external power amp. It features a 0.75" Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer. The speaker has a frequency range of 54-28k Hz. KEF LSX II has an MSRP of 1299$ per pair.
KEF replaced the older LSX with this model. Follow the link to read our detailed comparison of these models:
Compare KEF LSX II vs KEF LSX
KEF LSX II Lifestyle
KEF's LS Series of Loudspeakers
LSX II is a member of KEF's LS series of Powered speakers. Below you can see the main specs of these speakers.
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Frequency Response of the KEF LSX II Speaker
KEF LSX II has a Frequency response range of 54-28k Hz at ±3dB. With a minimum frequency of 54 Hz, LSX II delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.
To focus on the subwoofers that are in a similar price range with KEF LSX II, check out the Powered Subwoofers under $1500. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how LSX II's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
KEF LSX II Back View
Handheld Remote
KEF LSX II comes with a handheld remote which is obviously very useful to control your powered speakers from a distance.
KEF LSX II Handheld Remote
Bluetooth Connectivity
KEF LSX 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. LSX II can playback up to 24-bit / 384 kHz with compatible devices.
KEF LSX II supports the following Bluetooth Codecs when used with supported devices:
Supported Streaming Services
KEF LSX 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 LSX II supports the following wireless streaming methods:
- AirPlay 2
- Google Chromecast
- ROON Ready
- UPnP Compatible
- Bluetooth 4.2
App-Based Control
KEF LSX II can be controlled wirelessly via KEF Connect application available on Apple iOS and Android.
KEF Connect Wireless Control App
Inputs and Outputs
- 3.5mm Minijack Input
- USB Port: USB-C (connects to your computer)
- Wired Subwoofer Output
- Digital Input: Optical
- HDMI Input: ARC
- Ethernet Port
KEF LSX II Connections
KEF LSX II External Dimensions and Weight
KEF LSX II has external dimensions of (Height x Width x Depth) 9.5 × 6.1 × 7.1 inch (240 × 155 × 180 mm ).
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 LSX II is approximately 279.0cm2 / 43.2inch2.
To get a better perspective on the real life size of KEF LSX II, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).
KEF LSX II Speaker Size Compared to a Compact Disc
Here we place the KEF LSX 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 LSX II Speaker next to an amplifier and turntable
WeightThe KEF LSX II weighs 3.60kg / 7.9lbs per piece. Here is a comparison of how LSX II's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
Weight
Bookshelf Speakers under $1500
How does the KEF LSX II compare to the KEF LS50 Wireless II?
One of the natural alternative to the KEF LSX II is the LS50 Wireless II which is located one step higher in KEF's Powered Bookshelf selection.
Here is a scaled size comparison of these two speakers to give you an idea how their external dimensions compare:
Comparison image of KEF LSX II and KEF LS50 Wireless II Size and External Dimensions
Check the Detailed Comparison of KEF LSX II vs LS50 Wireless II for more details.
Cabinet type and Materials
KEF LSX 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.
Speaker Feet
KEF LSX II comes with
Optional floor spikes which you can use to secure your loudspeaker on the surface that you are putting on. It is always recommended to use some kind of feet under all types of speakers. Besides limiting the movement of the speakers, it also compensates for non-flat surfaces and limits the contact surface area of the speaker. Rubber based feet also help isolating the vibrations within certain frequency ranges.
Port Position
KEF LSX 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.
KEF LSX II Port
Available colors
KEF LSX II is available in Carbon Black, Mineral White, Cobalt Blue, Lava Red and and Soundwave.
KEF LSX II Colors
Wall Mounting
LSX II doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Speaker Stands
KEF sells a dedicated speaker stand for the LSX II with a model name
KEF S1. You can check the latest price and availability of these stands at
B&H PHOTO and
Amazon.
KEF S1 Speaker Stands for KEF LSX II
What's in the Box of KEF LSX II?
Here are the items that are included inside the box of LSX II:
2 Wireless powered speakersTwo 6.5-feet AC power cords10-feet Cat-6 interconnect speaker cableRemote control2 AAA batteries Quick Start Guide Important Safety Information Warranty Information Maintenance Guide
Recommended Accessories
Here is a list of accessories that we think you may need for the KEF LSX II.
- Vibration Isolators: IsoAcoustics isolators more affordable options too.
- Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
- Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.
User's Manual
For more information about how to setup, use and maintain the KEF LSX II, use the direct link below to download the official manual document:
Download User Manual for KEF LSX II
Official Brochure
Here is a link to download the official brochure for the KEF LSX II speaker:
Official Brochure for KEF LSX II
Official Product Page
Official manufacturer's product page for the KEF LSX II speaker can be found below:
Official Product Page for KEF LSX II
Warranty
1 Year of parts warranty and 1 Year of labor warranty is generally provided by the manufacturer.