In this review, we will be comparing G Two and LSX II, 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 II first before getting into our more
detailed comparison.
| Key Specs | Genelec G Two | KEF LSX II |
|---|
| 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 | 54-28k Hz |
|---|
| Max depth / sample rate | — | 24-bit / 384 kHz |
|---|
| Bluetooth | No | Built-in 4.2 |
|---|
| App control | — | Yes |
|---|
| Weight | 3.20kg / 7lbs | 3.60kg / 7.9lbs |
|---|
| Dimensions (H x W x D) | 9.5" x 5.9" x 5.6"
242 x 151 x 142 mm | 9.5" x 6.1" x 7.1"
240 × 155 × 180 mm |
|---|
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 II are 2-way speakers.
Genelec G TwoKEF LSX II
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 II |
|
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 II 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 II has a frequency range of 54-28k Hz. With a minimum frequency of 54Hz, the LSX II can go significantly deeper on the low side and provide stronger bass compared to 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 II 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.
KEF LSX II Port
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 II'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 II has external dimensions of 240 × 155 × 180 mm (9.5 × 6.1 × 7.1 inch).
Genelec G Two is 4mm narrower and 38mm less deeper than KEF LSX II but it is also 2mm taller.
Below you can see the front view size comparison of Genelec G Two and KEF LSX II in scale.
Comparison image of Genelec G Two and KEF LSX II 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 II is approximately 279.0cm2 / 43.2inch2. The G Two requires 23% less surface area than the LSX II 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 II 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 II weighs 3.60kg / 7.9lbs. This makes the LSX II 13% heavier than the G Two.
Here is a comparison of how G Two and LSX II'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 II?
Here are the items that come with the LSX II:
- 2 Wireless powered speakers
- Two 6.5-feet AC power cords
- 10-feet Cat-6 interconnect speaker cable
- Remote control
- 2 AAA batteries
- Quick Start Guide
- Important Safety Information
- Warranty Information
- Maintenance Guide
 Base Surface Area |
214cm2
vs
279cm2
|
Takes less floor space |
 Price per pair* |
1050USD
vs
1299USD
|
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 |
54 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 |
240mm
vs
242mm
|
Easier to fit in smaller spaces |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
 USB Port |
USB-C (connects to your computer)
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 |
 HDMI Input |
ARC
vs
No
|
Connect HDMI sources directly |
| General |
Genelec G Two |
KEF LSX II |
| Brand |
Genelec |
KEF |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Frequency Response |
62-20k Hz |
54-28k Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
100-watt RMS |
200-watt RMS |
| Max Bit Depth |
n/a |
24-bit |
| Max Sample Rate |
n/a |
384 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") |
240.0mm (9.4") |
| Width |
151.0mm (5.9") |
155.0mm (6.1") |
| Depth |
142.0mm (5.6") |
180.0mm (7.1") |
| Weight |
3.20kg (7lbs) |
3.60kg (7.9lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
Aluminum |
n/a |
| Available Colors |
White,Black,Raw(Aluminum) |
Carbon Black, Mineral White, Cobalt Blue, Lava Red, and Soundwave |
| Mounting Bracket |
No |
No |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
RCA |
3.5mm |
| USB Port |
No |
USB-C (connects to your computer) |
| Phone Input |
No |
No |
| Subwoofer Output |
n/a |
Wired |
| Digital Input |
No |
Optical |
| HDMI Input |
No |
ARC |
| 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 II 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 II digs deeper - 54Hz against 62Hz. A subwoofer would even that out. |
| Built-in power | B | KEF LSX II has the bigger amplifier (200W vs 100W RMS). |
| Connections | B | KEF LSX II adds Bluetooth, Wi-Fi, streaming, HDMI and digital inputs. |
| Size | depends | Genelec G Two is easier to place; KEF LSX II is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | B | KEF LSX II: a sub output. KEF LSX II 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 $1,299, about 19% less. |
A Genelec G Two B KEF LSX II
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 II 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. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 62Hz anyway, which makes the cheaper Genelec G Two much easier to justify.
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.