In this review, we will be comparing LSX and LS50 Wireless, 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 LSX and KEF LS50 Wireless first before getting into our more
detailed comparison.
LSX and LS50 Wireless are members of KEF's LS series of speakers. Below you can find the loudspeakers from this series.
In the following sections, we will get into more detail in order to better understand how the KEF LSX and KEF LS50 Wireless compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
Both LSX and LS50 Wireless are 2-way speakers.
| Driver |
KEF LSX |
KEF LS50 Wireless |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.75-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 4.5-inch
|
1 x 5.25-inch
|
LSX features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer . On the other hand, the LS50 Wireless features a 1" Aluminum Hard-Dome Tweeter and 1 x 5.25" Magnesium/aluminum alloy Woofer .
Frequency Response
LSX has a frequency range of 59-28k Hz whereas LS50 Wireless has a frequency range of 79-28k Hz. With a minimum frequency of 59Hz, the LSX can go significantly deeper on the low side and provide stronger bass compared to the LS50 Wireless's min frequency of 79Hz.
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
High Frequency
Bookshelf Speakers
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 LSX and LS50 Wireless 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 LSX's and KEF LS50 Wireless's external dimensions. KEF LSX has external dimensions of 239.7 x 155.6 x 180mm ( 9.4375 x 6.125 x 7.1inch) whereas KEF LS50 Wireless has external dimensions of 301.6 x 200.0 x 336.5mm ( 11.875 x 7.875 x 13.25inch) .
KEF LS50 Wireless is clearly the larger of the two speakers. Its body is 44.4mm wider, 61.9mm taller and 156.5mm deeper than KEF LSX.
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 LSX is approximately 365.7cm2 / 56.7inch2 and base area of the KEF LS50 Wireless is approximately 673.0cm2 / 104.3inch2. The LSX requires 46% less surface area than the LS50 Wireless which gives it a small advantage on placement in tight spaces.
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 LSX weighs 3.50kg / 7.7lbs and the KEF LS50 Wireless weighs 10.00kg / 22lbs. This makes the LS50 Wireless 186% heavier than the LSX.
Here is a comparison of how LSX and LS50 Wireless's weights compare with the average, max and min weights in Powered Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of KEF LSX?
Here are the items that are included inside the box of LSX:
2 Powered wireless audio speakerTwo 6.5-feet AC power cords10-feet Ethernet cableRemote control (CR2032 3V battery pre-installed)Maintenance GuideSpecificationsWarranty InformationImportant Safety Information
What's in the Box of KEF LS50 Wireless?
Here are the items that come with the LS50 Wireless:
Wireless powered speaker (Right)Wireless powered speaker (Left)Two 6.5-feet AC power cords10-feet Cat-6 interconnect speaker cable6.5-feet USB-B to USB-A cable42
 Low Frequency Response |
59 Hz
vs
79 Hz
|
Generates deeper bass |
 Height |
239mm
vs
301mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
365cm2 (155x180mm)
vs
673cm2 (200x336mm)
|
Takes less floor space |
 3.5mm Connection |
Yes
vs
No
|
Connection via 3.5mm AUX input |
| Woofer Size |
5.25 inches
vs
4.5 inches
|
Larger woofer |
 RCA Connection |
Yes
vs
No
|
Connection via RCA input |
| General |
KEF LSX |
KEF LS50 Wireless |
| Brand |
KEF |
KEF |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Frequency Response |
59-28k Hz |
79-28k Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
230-watt RMS |
| Max Bit Depth |
24-bit |
24-bit |
| Max Sample Rate |
96 kHz |
192 kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
4.5" |
5.25" |
| Woofer Composition |
Magnesium/Aluminium alloy |
Magnesium/aluminum alloy |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
0.75" |
1" |
| Tweeter Type |
Hard-Dome |
Hard-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
239.7mm (9.4") |
301.6mm (11.9") |
| Width |
155.6mm (6.1") |
200.0mm (7.9") |
| Depth |
180.0mm (7.1") |
336.5mm (13.2") |
| Weight |
3.50kg (7.7lbs) |
10.00kg (22lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Available Colors |
Black, Olive Green, Gloss White |
n/a |
| Mounting Bracket |
No |
No |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
3.5mm |
RCA |
| USB Port |
Charge only |
USB-B |
| Phone Input |
No |
No |
| Subwoofer Output |
Wired |
Wired |
| Digital Input |
Optical |
Optical |
| HDMI Input |
No |
No |
| Headphone Jack |
No |
No |
| Ethernet Port |
Yes |
Yes |
Other |
|
|
| Parts Warranty |
1 Year |
1 Year |
| Labor Warranty |
1 Year |
1 Year |