In this review, we will be comparing Prime Wireless Pro and LSX, two Powered Bookshelf speakers from SVS and 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 SVS Prime Wireless Pro and KEF LSX first before getting into our more
detailed comparison.
SVS Prime Wireless Pro Key Specs
- 2-way Design
- 200-watt RMS Integrated Amplifier
- 1" Dome Tweeter
- 5.25" Polypropylen cone Woofer
- 42-25k Hz Frequency Response
- 24-bit Max Depth / 192 kHz Max Sample Rate
- Built-in 5.0 Bluetooth
- App Control Feature
- Weight:5.30kg
- Dimensions (H x W x D): 295.0" x 7.09" x 8.96"( 295 x 180 x 228mm )
KEF LSX Key Specs
- 2-way Design
- 200-watt RMS Integrated Amplifier
- 0.75" Hard-Dome Tweeter
- 4.5" Magnesium/Aluminium alloy Woofer
- 59-28k Hz Frequency Response
- 24-bit Max Depth / 96 kHz Max Sample Rate
- Built-in 4.2 Bluetooth
- App Control Feature
- Weight:3.50kg
- Dimensions (H x W x D): 239.7" x 6.125" x 7.1"( 239.7 x 155.6 x 180mm )
In the following sections, we will get into more detail in order to better understand how the SVS Prime Wireless Pro and KEF LSX 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 Prime Wireless Pro and LSX are 2-way speakers.
| Driver |
SVS Prime Wireless Pro |
KEF LSX |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
0.75-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 4.5-inch
|
Prime Wireless Pro features a 1" aluminum Dome Tweeter and 1 x 5.25" Polypropylen cone Woofer with a Crossover frequency at 2000Hz. On the other hand, the LSX features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer .
Frequency Response
Prime Wireless Pro has a frequency range of 42-25k Hz whereas LSX has a frequency range of 59-28k Hz. With a minimum frequency of 42Hz, the Prime Wireless Pro 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 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 Prime Wireless Pro and LSX 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 SVS Prime Wireless Pro's and KEF LSX's external dimensions. SVS Prime Wireless Pro has external dimensions of 295 x 180 x 228mm ( 11.61 x 7.09 x 8.96 inch) whereas KEF LSX has external dimensions of 239.7 x 155.6 x 180mm ( 9.4375 x 6.125 x 7.1inch) .
SVS Prime Wireless Pro is clearly the larger of the two speakers. Its body is 24.4mm wider, 55.3mm taller and 48mm 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 SVS Prime Wireless Pro is approximately 414.0cm2 / 64.2inch2 and base area of the KEF LSX is approximately 365.7cm2 / 56.7inch2. The Prime Wireless Pro requires 13% more surface area than the LSX which gives it a small disadvantage 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 SVS Prime Wireless Pro weighs 5.30kg / 11.7lbs and the KEF LSX weighs 3.50kg / 7.7lbs. This makes the Prime Wireless Pro 51% heavier than the LSX.
Here is a comparison of how Prime Wireless Pro and LSX's weights compare with the average, max and min weights in Powered Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of SVS Prime Wireless Pro?
Here are the items that are included inside the box of Prime Wireless Pro:
Active wireless speaker6-feet AC power cordGrille (pre-installed)8 Self-adhesive feetActive-Passive Speaker Interconnect Cable: 3m / 10ftQuick Start GuideWarranty/Registration CardSVS brochureRemote
What's in the Box of KEF LSX?
Here are the items that come with the 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
 Woofer Size |
5.25 inches
vs
4.5 inches
|
Larger woofer |
|
Low Frequency Response |
42 Hz
vs
59 Hz
|
Generates deeper bass |
 Price per pair* |
899USD
vs
1250USD
|
costs less (*prices may change depending on the seller, location and time) |
 RCA Connection |
Yes
vs
No
|
Connection via RCA input |
 HDMI Input |
ARC,eARC
vs
No
|
Connect HDMI sources directly |
 High Frequency Response |
28k Hz
vs
25k Hz
|
Generates higher frequency |
 Height |
239mm
vs
295mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
365cm2
vs
414cm2
|
Takes less floor space |
| General |
SVS Prime Wireless Pro |
KEF LSX |
| Brand |
SVS |
KEF |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Frequency Response |
42-25k Hz |
59-28k Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
200-watt RMS |
| Max Bit Depth |
24-bit |
24-bit |
| Max Sample Rate |
192 kHz |
96 kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
4.5" |
| Woofer Composition |
Polypropylen cone |
Magnesium/Aluminium alloy |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
1" |
0.75" |
| Tweeter Type |
Dome |
Hard-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2000Hz |
n/a |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
295.0mm (11.6") |
239.7mm (9.4") |
| Width |
180.0mm (7.1") |
155.6mm (6.1") |
| Depth |
228.0mm (9") |
180.0mm (7.1") |
| Weight |
5.30kg (11.7lbs) |
3.50kg (7.7lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Available Colors |
Piano Gloss Black,Piano Gloss White |
Black, Olive Green, Gloss White |
| Mounting Bracket |
No |
No |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
3.5mm, RCA |
3.5mm |
| USB Port |
Service and Powering only |
Charge only |
| Phone Input |
No |
No |
| Subwoofer Output |
Wired |
Wired |
| Digital Input |
Optical |
Optical |
| HDMI Input |
ARC,eARC |
No |
| Headphone Jack |
No |
No |
| Ethernet Port |
Yes |
Yes |
Other |
|
|
| Parts Warranty |
2 Years |
1 Year |
| Labor Warranty |
2 Years |
1 Year |