In this review, we will be comparing LSX II LT and Borea BR03 BT, two Powered Bookshelf speakers from KEF and Triangle. 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 II LT and Triangle Borea BR03 BT first before getting into our more
detailed comparison.
KEF LSX II LT Key Specs
- 2-way Design
- 200-watt RMS Integrated Amplifier
- 11th Generation Uni-Q Driver
- 0.75" Hard-Dome Tweeter
- 4.5" Magnesium/Aluminium alloy Woofer
- 54-28k Hz Frequency Response
- 24-bit Max Depth / 384 kHz Max Sample Rate
- Built-in 5.0 Bluetooth
- App Control Feature
- Weight:3.60kg
- Dimensions (H x W x D): 240.0" x 6.1" x 7.1"( 240 × 155 × 180 mm )
Triangle Borea BR03 BT Key Specs
- 2-way Design
- 100-watt RMS Integrated Amplifier
- 1" Dome Tweeter
- 5" fiberglass Woofer
- 56-22kHz Frequency Response
- 89dB Sensitivity
- Impedance: 8ohms
- 24-bit Max Depth / 48 kHz Max Sample Rate
- Built-in 5.0 Bluetooth
- Weight:11.20kg
- Dimensions (H x W x D): 310.0" x 6.92" x 10.8"( 176 x 310 x 274 mm )
In the following sections, we will get into more detail in order to better understand how the KEF LSX II LT and Triangle Borea BR03 BT 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 LSX II LT and Borea BR03 BT are 2-way speakers.
| Driver |
KEF LSX II LT |
Triangle Borea BR03 BT |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.75-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 4.5-inch
|
1 x 5-inch
|
LSX II LT features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer . On the other hand, the Borea BR03 BT features a 1" EFS fabric Dome Tweeter and 1 x 5" fiberglass Woofer .
Frequency Response
LSX II LT has a frequency range of 54-28k Hz whereas Borea BR03 BT has a frequency range of 56-22kHz. With a minimum frequency of 54Hz, the LSX II LT can go slightly deeper then the Borea BR03 BT's min frequency of 56Hz.
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 LSX II LT and Borea BR03 BT 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 KEF LSX II LT's and Triangle Borea BR03 BT's external dimensions. KEF LSX II LT has external dimensions of 240 × 155 × 180 mm ( 9.5 × 6.1 × 7.1 inch) whereas Triangle Borea BR03 BT has external dimensions of 176 x 310 x 274 mm ( 6.92 x 12.2 x 10.8 inches) .
Triangle Borea BR03 BT is clearly the larger of the two speakers. Its body is 21mm wider, 70mm taller and 94mm deeper than KEF LSX II LT.
Below you can see the front view size comparison of KEF LSX II LT and Triangle Borea BR03 BT in scale.
Comparison image of KEF LSX II LT and Triangle Borea BR03 BT 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 KEF LSX II LT is approximately 279.0cm2 / 43.2inch2 and base area of the Triangle Borea BR03 BT is approximately 482.0cm2 / 74.7inch2. The LSX II LT requires 42% less surface area than the Borea BR03 BT 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:
Size Comparison image of KEF LSX II LT and Triangle Borea BR03 BT 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 KEF LSX II LT weighs 3.60kg / 7.9lbs and the Triangle Borea BR03 BT weighs 11.20kg / 24.6lbs. This makes the Borea BR03 BT 211% heavier than the LSX II LT.
Here is a comparison of how LSX II LT and Borea BR03 BT's weights compare with the average, max and min weights in Powered Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of KEF LSX II LT?
Here are the items that are included inside the box of LSX II LT:
2 Wireless powered speakers6.5-feet AC power cords3m - 10ft Interspeaker cableRemote control2 AAA batteries Quick Start Guide Important Safety Information Warranty Information Maintenance Guide
What's in the Box of Triangle Borea BR03 BT?
Here are the items that come with the Borea BR03 BT:
1 x passive loudspeaker BOREA BT cable to link the loudspeakers 8. 1 x user manual1 x active loudspeaker BOREA BT (indicator light on the front) 2 x protection grills 1 x remote control, incl. 2 AAA batteries 8 x adhesive anti-slip feet to place below the speakers 1 x AC power cord 1 x 3 meters speaker
 Low Frequency Response |
54 Hz
vs
56 Hz
|
Generates deeper bass |
 High Frequency Response |
28k Hz
vs
22k Hz
|
Generates higher frequency |
 App-Based Control |
Apple iOS, Android
vs
None
|
Control the speaker via an app |
 Height |
240mm
vs
310mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
279cm2
vs
482cm2
|
Takes less floor space |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
 USB Port |
USB-C (connects to your computer)
vs
No
|
USB port adds flexibility |
 HDMI Input |
ARC
vs
No
|
Connect HDMI sources directly |
|
Woofer Size |
5 inches
vs
4.5 inches
|
Larger woofer |
 Price per pair* |
599USD
vs
999USD
|
costs less (*prices may change depending on the seller, location and time) |
 3.5mm Connection |
Yes
vs
No
|
Connection via 3.5mm AUX input |
 RCA Connection |
Yes
vs
No
|
Connection via RCA input |
 Phono Input |
Yes
vs
No
|
Connect your turntable directly |
| General |
KEF LSX II LT |
Triangle Borea Active BR03 BT |
| Brand |
KEF |
Triangle |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Sensitivity |
n/a |
89dB |
| Impedance |
n/a |
8 ohms |
| Impedance |
n/a |
3.6 ohms |
| Frequency Response |
54-28k Hz |
56-22kHz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
100-watt RMS |
| Max Bit Depth |
24-bit |
24-bit |
| Max Sample Rate |
384 kHz |
48 kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
4.5" |
5" |
| Woofer Composition |
Magnesium/Aluminium alloy |
fiberglass |
| Woofer Surround Material |
Rubber |
n/a |
| Tweeter Size |
0.75" |
1" |
| Tweeter Type |
Hard-Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
240.0mm (9.4") |
310.0mm (12.2") |
| Width |
155.0mm (6.1") |
176.0mm (6.9") |
| Depth |
180.0mm (7.1") |
274.0mm (10.8") |
| Weight |
3.60kg (7.9lbs) |
11.20kg (24.6lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Available Colors |
Sage Green, Graphite Grey, Stone White |
Light Oak Blue,Oak Green,Cream,Light Oak,Black |
| Mounting Bracket |
No |
No |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
n/a |
3.5mm, RCA |
| USB Port |
USB-C (connects to your computer) |
No |
| Phone Input |
No |
Yes |
| Subwoofer Output |
Wired |
mono-RCA |
| Digital Input |
Optical |
Optical,Coaxial |
| HDMI Input |
ARC |
No |
| Headphone Jack |
No |
No |
| Ethernet Port |
Yes |
No |
Other |
|
|
| Parts Warranty |
1 Year |
5 Years |
| Labor Warranty |
1 Year |
5 Years |