In this review, we will be comparing G Two and LSX, two Powered Bookshelf speakers from Genelec 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 Genelec G Two and KEF LSX first before getting into our more
detailed comparison.
| Key Specs | Genelec G Two | KEF LSX |
|---|
| Brand | Genelec
Finland · founded 1978 | KEF
United Kingdom · founded 1961 |
|---|
| Design | 2-way | 2-way |
|---|
| Built-in amplifier | 100-watt RMS | 200-watt RMS |
|---|
| Uni-Q driver | — | 11th Generation Uni-Q |
|---|
| Tweeter | 0.75" Dome | 0.75" Hard-Dome |
|---|
| Woofer | 4.1" Cone | 4.5" Magnesium/Aluminium alloy |
|---|
| Frequency response | 62-20k Hz | 59-28k Hz |
|---|
| Max depth / sample rate | — | 24-bit / 96 kHz |
|---|
| Bluetooth | No | Built-in 4.2 |
|---|
| App control | — | Yes |
|---|
| Weight | 3.20kg / 7lbs | 3.50kg / 7.7lbs |
|---|
| Dimensions (H x W x D) | 9.5" x 5.9" x 5.6"
242 x 151 x 142 mm | 9.4375" x 6.125" x 7.1"
239.7 x 155.6 x 180mm |
|---|
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both G Two and LSX are 2-way speakers.
Genelec G TwoKEF LSX
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Genelec G Two |
KEF LSX |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.75-inch
|
0.75-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 4.1-inch
|
1 x 4.5-inch
|
G Two features a 0.75" Dome Tweeter and 1 x 4.1" Cone Woofer with a Crossover frequency at 3000Hz. 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
G Two has a frequency range of 62-20k Hz whereas LSX has a frequency range of 59-28k Hz. With a minimum frequency of 59Hz, the LSX can go slightly deeper then the G Two's min frequency of 62Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Cabinet Type and Port Position
Both G Two 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
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Genelec G Two's and KEF LSX's external dimensions. Genelec G Two has external dimensions of 242 x 151 x 142 mm (9.5 x 5.9 x 5.6) whereas KEF LSX has external dimensions of 239.7 x 155.6 x 180mm (9.4375 x 6.125 x 7.1inch).
Genelec G Two is 4.6mm narrower and 38mm less deeper than KEF LSX but it is also 2.3mm taller.
Below you can see the front view size comparison of Genelec G Two and KEF LSX in scale.
Comparison image of Genelec G Two 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 Genelec G Two is approximately 214.4cm2 / 33.2inch2 and base area of the KEF LSX is approximately 280.1cm2 / 43.4inch2. The G Two requires 23% less surface area than the LSX which gives it a small advantage on placement in tight spaces.
Here is 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 Genelec G Two 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 Genelec G Two weighs 3.20kg / 7lbs and the KEF LSX weighs 3.50kg / 7.7lbs. This makes the LSX 9% heavier than the G Two.
Here is a comparison of how G Two 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 Genelec G Two?
Here are the items that are included inside the box of G Two:
- Genelec G Two 2-Way Powered Bookshelf Speaker (Polar White, Single)
- Iso-Pod Stand
- 5.9-feet Power Cable
What's in the Box of KEF LSX?
Here are the items that come with the LSX:
- 2 Powered wireless audio speaker
- Two 6.5-feet AC power cords
- 10-feet Ethernet cable
- Remote control (CR2032 3V battery pre-installed)
- Maintenance Guide
- Specifications
- Warranty Information
- Important Safety Information
 Base Surface Area |
214cm2
vs
280cm2
|
Takes less floor space |
 Price per pair* |
1050USD
vs
1250USD
|
costs less (*prices may change depending on the seller, location and time) |
 RCA Connection |
Yes
vs
No
|
Connection via RCA input |
 Woofer Size |
4.5 inches
vs
4.1 inches
|
Larger woofer |
|
Low Frequency Response |
59 Hz
vs
62 Hz
|
Generates deeper bass |
 High Frequency Response |
28k Hz
vs
20k Hz
|
Generates higher frequency |
 Handheld Remote |
Yes
vs
No
|
Control the speaker by the included RC |
 App-Based Control |
Apple iOS, Android
vs
None
|
Control the speaker via an app |
 Height |
239mm
vs
242mm
|
Easier to fit in smaller spaces |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
 USB Port |
Charge only
vs
No
|
USB port adds flexibility |
 3.5mm Connection |
Yes
vs
No
|
Connection via 3.5mm AUX input |
 Digital Input |
Optical
vs
No
|
Connect digital inputs directly |
| General |
Genelec G Two |
KEF LSX |
| Brand |
Genelec |
KEF |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Frequency Response |
62-20k Hz |
59-28k Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
100-watt RMS |
200-watt RMS |
| Max Bit Depth |
n/a |
24-bit |
| Max Sample Rate |
n/a |
96 kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
4.1" |
4.5" |
| Woofer Composition |
Cone |
Magnesium/Aluminium alloy |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
0.75" |
0.75" |
| Tweeter Type |
Dome |
Hard-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
3000Hz |
n/a |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
242.0mm (9.5") |
239.7mm (9.4") |
| Width |
151.0mm (5.9") |
155.6mm (6.1") |
| Depth |
142.0mm (5.6") |
180.0mm (7.1") |
| Weight |
3.20kg (7lbs) |
3.50kg (7.7lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
Aluminum |
n/a |
| Available Colors |
White,Black,Raw(Aluminum) |
Black, Olive Green, Gloss White |
| Mounting Bracket |
No |
No |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
RCA |
3.5mm |
| USB Port |
No |
Charge only |
| Phone Input |
No |
No |
| Subwoofer Output |
n/a |
Wired |
| Digital Input |
No |
Optical |
| HDMI Input |
No |
No |
| Headphone Jack |
No |
No |
| Ethernet Port |
No |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
1 Year |
| Labor Warranty |
5 Years |
1 Year |
A generation apart: KEF LSX is the newer design, against a 2013 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass | B | KEF LSX digs deeper - 59Hz against 62Hz. A subwoofer would even that out. |
| Built-in power | B | KEF LSX has the bigger amplifier (200W vs 100W RMS). |
| Connections | B | KEF LSX adds Bluetooth, Wi-Fi, streaming and digital inputs. |
| Size | depends | Genelec G Two is easier to place; KEF LSX is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | B | KEF LSX: a sub output. KEF LSX sits in a wider range (10 models), so a matched surround system is easier later. |
| Price | A | Genelec G Two is cheaper - $1,050 against $1,250, about 16% less. |
A Genelec G Two B KEF LSX
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
KEF LSX leads across most of the measured areas for a fairly modest premium, which makes it the easier pick if the budget stretches. Genelec G Two is the one to take if it does not.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.