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KEF LS50 Wireless II vs KEF LSX II LT Comparison

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KEF LS50 Wireless II

Powered Bookshelf | 45-28k Hz

KEF LS50 Wireless II
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KEF LSX II LT

Powered Bookshelf | 54-28k Hz

KEF LSX II LT
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KEF LS50 Wireless II KEF LS50 Wireless II
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KEF LSX II LT KEF LSX II LT
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KEF LS50 Wireless II
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KEF LSX II LT
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KEF LS50 Wireless II vs KEF LSX II LT Speaker Comparison

In this review, we will be comparing LS50 Wireless II and LSX II LT, two Powered Bookshelf speakers by KEF Being Powered speakers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them.

Let's have a brief look at the main features of KEF LS50 Wireless II and KEF LSX II LT first before getting into our more detailed comparison.

KEF LS50 Wireless II Key Specs

  • 2-way Design
  • 380-watt RMS( 760-watt Peak) Integrated Amplifier
  • 12th Generation Uni-Q Driver
  • 1" Hard-Dome Tweeter
  • 5.25" Aluminum Woofer
  • 45-28k Hz Frequency Response
  • 32-bit Max Depth / 384 kHz Max Sample Rate
  • Built-in 4.2 Bluetooth
  • App Control Feature
  • Weight:10.00kg
  • Dimensions (H x W x D): 277.8" x 7.875" x 12.6875"( 277.8 x 200.0 x 322.3mm )

KEF LSX II LT Key Specs

  • 2-way Design
  • 200-watt RMS Integrated Amplifier
  • 11th Generation Uni-Q Driver
  • 0.75" Hard-Dome Tweeter
  • 4.5" Magnesium/Aluminium alloy Woofer
  • 54-28k Hz Frequency Response
  • 24-bit Max Depth / 384 kHz Max Sample Rate
  • Built-in 5.0 Bluetooth
  • App Control Feature
  • Weight:3.60kg
  • Dimensions (H x W x D): 240.0" x 6.1" x 7.1"( 240 × 155 × 180 mm )

LS50 Wireless II and LSX II LT are members of KEF's LS series of speakers. Below you can find the loudspeakers from this series.

KEF LS Series History
Model Body Frequency Watts RMSMax Depth / Sample Rate Woofer
KEF LSX II
  
Bookshelf 54-28k Hz 200-watt24-bit/384 kHzΩ 1 x 4.5"
KEF LSX II LT
Bookshelf 54-28k Hz 200-watt24-bit/384 kHzΩ 1 x 4.5"
KEF LS60 Wireless
  
Floor-standing 31-24k Hz 1400-watt24-bit/384 kHzΩ 4 x 5.25"
KEF LS50 Wireless II
Bookshelf 45-28k Hz 380-watt32-bit/384 kHzΩ 1 x 5.25"
KEF LSX
  
Bookshelf 59-28k Hz 200-watt24-bit/96 kHzΩ 1 x 4.5"
KEF LS50 Wireless
  
Bookshelf 79-28k Hz 230-watt24-bit/192 kHzΩ 1 x 5.25"

In the following sections, we will get into more detail in order to better understand how the KEF LS50 Wireless II and KEF LSX II LT compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.


**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.


Drivers

Both LS50 Wireless II and LSX II LT are 2-way speakers.

Driver KEF LS50 Wireless II KEF LSX II LT
Driver Setup 2-way 2-way
Tweeter 1-inch 0.75-inch
Midrange - -
Woofer 1 x 5.25-inch 1 x 4.5-inch

LS50 Wireless II features a 1" Aluminum Hard-Dome Tweeter and 1 x 5.25" Aluminum Woofer . On the other hand, the LSX II LT features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer .

Frequency Response

LS50 Wireless II has a frequency range of 45-28k Hz whereas LSX II LT has a frequency range of 54-28k Hz. With a minimum frequency of 45Hz, the LS50 Wireless II can go significantly deeper on the low side and provide stronger bass compared to the LSX II LT's min frequency of 54Hz.

Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Bookshelf class in our database.

Low Frequency

Bookshelf Speakers

LS50 Wireless II
LSX II LT
Min
Average
Max
High Frequency

Bookshelf Speakers

KEF LS50 Wireless II
KEF LSX II LT
Min
Average
Max

None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.

Cabinet Type and Port Position

Both LS50 Wireless II and LSX II LT have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.

If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.

Physical Specs

Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare KEF LS50 Wireless II's and KEF LSX II LT's external dimensions. KEF LS50 Wireless II has external dimensions of 277.8 x 200.0 x 322.3mm ( 10.9375 x 7.875 x 12.6875inch) whereas KEF LSX II LT has external dimensions of 240 × 155 × 180 mm ( 9.5 × 6.1 × 7.1 inch) .

KEF LS50 Wireless II is clearly the larger of the two speakers. Its body is 45mm wider, 37.8mm taller and 142.3mm deeper than KEF LSX II LT.

Below you can see the front view size comparison of KEF LS50 Wireless II and KEF LSX II LT in scale.

KEF LS50 Wireless II vs KEF LSX II LT Size Comparison - Front View
Comparison image of KEF LS50 Wireless II and KEF LSX II LT Size and External Dimensions

Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base surface area of the KEF LS50 Wireless II is approximately 644.6cm2 / 99.9inch2 and base area of the KEF LSX II LT is approximately 279.0cm2 / 43.2inch2. The LS50 Wireless II requires 131% more surface area than the LSX II LT which gives it a small disadvantage on placement in tight spaces.

Here is an another comparison that shows both speakers on a BDI Octave Media Cabinet, next to a standard size amplifier and turntable in scale:

KEF LS50 Wireless II vs KEF LSX II LT Size Comparison on a Media Console
Size Comparison image of KEF LS50 Wireless II and KEF LSX II LT on a Media Console
Weight Comparison

The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The KEF LS50 Wireless II weighs 10.00kg / 22lbs and the KEF LSX II LT weighs 3.60kg / 7.9lbs. This makes the LS50 Wireless II 178% heavier than the LSX II LT.

Here is a comparison of how LS50 Wireless II and LSX II LT's weights compare with the average, max and min weights in Powered Bookshelf class.

Weight
All Bookshelf Speakers
KEF LS50 Wireless II
KEF LSX II LT
Min
Average
Max

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
  • What's in the Box of KEF LSX II LT?

    Here are the items that come with the LSX II LT:
  • 2 Wireless powered speakers
  • 6.5-feet AC power cords
  • 3m - 10ft Interspeaker cable
  • Remote control
  • 2 AAA batteries
  • Quick Start Guide
  • Important Safety Information
  • Warranty Information
  • Maintenance Guide

  • Reasons to choose KEF LS50 Wireless II over KEF LSX II LT
    Uni-Q Driver 12th Generation vs 11th Generation Newer generation Driver
    Woofer Size 5.25 inches vs 4.5 inches Larger woofer
    Low Frequency Response 45 Hz vs 54 Hz Generates deeper bass
    3.5mm Connection Yes vs No Connection via 3.5mm AUX input

    Reasons to choose KEF LSX II LT over KEF LS50 Wireless II

    Height 240mm vs 277mm Easier to fit in smaller spaces
    Base Surface Area 279cm2 vs 644cm2 Takes less floor space
    Price per pair* 999USD vs 2499USD costs less (*prices may change depending on the seller, location and time)
    KEF LS50 Wireless II vs KEF LSX II LT Specs Table
    Detailed comparison of specifications
    General KEF LS50 Wireless II KEF LSX II LT
    Brand KEF KEF
    Speaker Type Powered Stereo Speakers Powered Stereo Speakers
    Frequency Response 45-28k Hz 54-28k Hz
    Amplifier
    Watts RMS (Continuous) 380-watt RMS 200-watt RMS
    Watts Peak (Max) 760-watt RMS n/a
    Max Bit Depth 32-bit 24-bit
    Max Sample Rate 384 kHz 384 kHz
    Drivers
    Woofer Quantity 1 1
    Woofer Size 5.25" 4.5"
    Woofer Composition Aluminum Magnesium/Aluminium alloy
    Woofer Surround Material Rubber Rubber
    Tweeter Size 1" 0.75"
    Tweeter Type Hard-Dome Hard-Dome
    Aimable Tweeter No No
    Midrange Driver No No
    Firing Direction rear rear
    Physical Specs
    Height 277.8mm (10.9") 240.0mm (9.4")
    Width 200.0mm (7.9") 155.0mm (6.1")
    Depth 322.3mm (12.7") 180.0mm (7.1")
    Weight 10.00kg (22lbs) 3.60kg (7.9lbs)
    Enclosure Bass Reflex Bass Reflex
    Available Colors n/a Sage Green, Graphite Grey, Stone White
    Mounting Bracket No No
    Moisture Resistancy No No
    Connections
    Aux Inputs 3.5mm n/a
    USB Port Service only USB-C (connects to your computer)
    Phone Input No No
    Subwoofer Output Wired Wired
    Digital Input Optical, Coax Optical
    HDMI Input eARC ARC
    Headphone Jack No No
    Ethernet Port Yes Yes
    Other
    Parts Warranty 1 Year 1 Year
    Labor Warranty 1 Year 1 Year

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