In this review, we will be comparing LSX and LS50 Wireless II, 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 II first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how KEF LSX and KEF LS50 Wireless II compares and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Both LSX and LS50 Wireless II are 2-way speakers. LSX features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer . On the other hand, LS50 Wireless II features a 1" Aluminum Hard-Dome Tweeter and 1 x 5.25" Aluminum Woofer .
LSX has a frequency range of 59-28k Hz whereas LS50 Wireless II has a frequency range of 45-28k 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's min frequency of 59Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers under Bookshelf class in our database.
Cabinet Type and Port Position
Both LSX and LS50 Wireless II have rear firing ports. Rear ported speakers generlly need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing too close to the walls may cause the bass to sound boomy.
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 II's external dimensions. KEF LSX has external dimensions of 239.7 x 155.6 x 235.0mm ( 9.4375 x 6.125 x 9.25inch) whereas KEF LS50 Wireless II has external dimensions of 277.8 x 200.0 x 322.3mm ( 10.9375 x 7.875 x 12.6875inch) .
KEF LS50 Wireless II is clearly the larger of the two speakers. Its body is 44.4mm wider, 38.1mm taller and 87.3mm deeper than KEF LSX.
Below you can see the front view size comparison of KEF LSX and KEF LS50 Wireless II in scale.
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 II is approximately 644.6cm2 / 99.9inch2. The LSX requires 43% less surface area than the LS50 Wireless II which gives it a small advantage 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: