In this review, we will be comparing The Sevens and LSX, two Powered Bookshelf speakers from Klipsch 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 Klipsch The Sevens and KEF LSX first before getting into our more
detailed comparison.
In the following sections, we will get into more detail in order to better understand how the Klipsch The Sevens 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 The Sevens and LSX are 2-way speakers.
| Driver |
Klipsch The Sevens |
KEF LSX |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
0.75-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 4.5-inch
|
The Sevens features a 1" Titanium Tractrix Horn Tweeter and 1 x 6.5" Fiber-composite Woofer . 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
The Sevens has a frequency range of 39-25k Hz whereas LSX has a frequency range of 59-28k Hz. With a minimum frequency of 39Hz, the The Sevens 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 The Sevens 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 Klipsch The Sevens's and KEF LSX's external dimensions. Klipsch The Sevens has external dimensions of 416.0 x 207.0 x 335.0mm ( 16.375inch x 8.125inch x 13.1875inch ) whereas KEF LSX has external dimensions of 239.7 x 155.6 x 180mm ( 9.4375 x 6.125 x 7.1inch) .
Klipsch The Sevens is clearly the larger of the two speakers. Its body is 51.4mm wider, 176.3mm taller and 155mm deeper than KEF LSX.
Below you can see the front view size comparison of Klipsch The Sevens and KEF LSX in scale.
Comparison image of Klipsch The Sevens and KEF LSX 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 Klipsch The Sevens is approximately 693.5cm2 / 107.5inch2 and base area of the KEF LSX is approximately 365.7cm2 / 56.7inch2. The The Sevens requires 90% more surface area than the LSX 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:
Size Comparison image of Klipsch The Sevens and KEF LSX 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 Klipsch The Sevens weighs 9.03kg / 19.9lbs and the KEF LSX weighs 3.50kg / 7.7lbs. This makes the The Sevens 158% heavier than the LSX.
Here is a comparison of how The Sevens 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 Klipsch The Sevens?
Here are the items that are included inside the box of The Sevens:
Powered speaker (Primary) Passive speaker (Secondary) 2 Grilles (pre-installed) 6.5-feet AC power cord 13-feet Proprietary speaker cable 6.5-feet Proprietary extension cable 58-inch HDMI cable 5-feet USB-B to USB-A cable Remote control 2 AAA batteries Instruction Booklet Need Help? Card
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 |
6.5 inches
vs
4.5 inches
|
Larger woofer |
| Low Frequency Response |
39 Hz
vs
59 Hz
|
Generates deeper bass |
 Phono Input |
Yes
vs
No
|
Connect your turntable directly |
 HDMI Input |
ARC
vs
No
|
Connect HDMI sources directly |
 High Frequency Response |
28k Hz
vs
25k Hz
|
Generates higher frequency |
 Height |
239mm
vs
416mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
365cm2 (155x180mm)
vs
693cm2 (207x335mm)
|
Takes less floor space |
 Price per pair* |
1250USD
vs
1299USD
|
costs less (*prices may change depending on the seller, location and time) |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
 USB Port |
Charge only
vs
No
|
USB port adds flexibility |
| General |
Klipsch The Sevens |
KEF LSX |
| Brand |
Klipsch |
KEF |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Frequency Response |
39-25k Hz |
59-28k Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
200-watt RMS |
| Watts Peak (Max) |
400-watt RMS |
n/a |
| Max Bit Depth |
24-bit |
24-bit |
| Max Sample Rate |
192 kHz |
96 kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
4.5" |
| Woofer Composition |
Fiber-composite |
Magnesium/Aluminium alloy |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
1" |
0.75" |
| Tweeter Type |
Tractrix Horn |
Hard-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
416.0mm (16.4") |
239.7mm (9.4") |
| Width |
207.0mm (8.1") |
155.6mm (6.1") |
| Depth |
335.0mm (13.2") |
180.0mm (7.1") |
| Weight |
9.03kg (19.9lbs) |
3.50kg (7.7lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF with genuine wood veneer |
n/a |
| Available Colors |
Black,Walnut |
Black, Olive Green, Gloss White |
| Mounting Bracket |
No |
No |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
3.5mm |
3.5mm |
| USB Port |
USB-B |
Charge only |
| Phone Input |
Yes |
No |
| Subwoofer Output |
mono-RCA |
Wired |
| Digital Input |
Optical, HDMI |
Optical |
| HDMI Input |
ARC |
No |
| Headphone Jack |
No |
No |
| Ethernet Port |
No |
Yes |
Other |
|
|
| Parts Warranty |
1 Year |
1 Year |
| Labor Warranty |
1 Year |
1 Year |