In this review, we will be comparing Borea BR02 BT and R-51PM, two Powered Bookshelf speakers from Triangle and Klipsch. 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 Triangle Borea BR02 BT and Klipsch R-51PM 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 Triangle Borea BR02 BT and Klipsch R-51PM 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 Borea BR02 BT and R-51PM are 2-way speakers.
| Driver |
Triangle Borea BR02 BT |
Klipsch R-51PM |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1.0-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 5.25-inch
|
Borea BR02 BT features a 1" EFS fabric Dome Tweeter and 1 x 6.5" fiberglass Woofer . On the other hand, the R-51PM features a 1.0" Aluminum LTS Tractrix Horn Tweeter and 1 x 5.25" Copper-spun IMG Woofer with a Crossover frequency at 1663Hz.
Frequency Response
Borea BR02 BT has a frequency range of 47-22kHz whereas R-51PM has a frequency range of 68-21k Hz. With a minimum frequency of 47Hz, the Borea BR02 BT can go significantly deeper on the low side and provide stronger bass compared to the R-51PM's min frequency of 68Hz.
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 Borea BR02 BT and R-51PM 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 Triangle Borea BR02 BT's and Klipsch R-51PM's external dimensions. Triangle Borea BR02 BT has external dimensions of 206 x 360 x 314 mm ( 8.1x 14.1 x 12.36 inches) whereas Klipsch R-51PM has external dimensions of 330.2 x 179.4 x 260.3mm ( 13 x 7.0625 x 10.25inch) .
Triangle Borea BR02 BT is clearly the larger of the two speakers. Its body is 26.6mm wider, 29.8mm taller and 53.7mm deeper than Klipsch R-51PM.
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 Triangle Borea BR02 BT is approximately 646.0cm2 / 100.1inch2 and base area of the Klipsch R-51PM is approximately 467.0cm2 / 72.4inch2. The Borea BR02 BT requires 38% more surface area than the R-51PM 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 Triangle Borea BR02 BT weighs 14.20kg / 31.2lbs and the Klipsch R-51PM weighs 4.80kg / 10.6lbs. This makes the Borea BR02 BT 196% heavier than the R-51PM.
Here is a comparison of how Borea BR02 BT and R-51PM's weights compare with the average, max and min weights in Powered Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Triangle Borea BR02 BT?
Here are the items that are included inside the box of Borea BR02 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
What's in the Box of Klipsch R-51PM?
Here are the items that come with the R-51PM:
Powered speaker (right)Passive speaker (left)2 Grilles68-inch AC power cordRemote control2
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
47 Hz
vs
68 Hz
|
Generates deeper bass |
 High Frequency Response |
22k Hz
vs
21k Hz
|
Generates higher frequency |
 Price per pair* |
499USD
vs
599USD
|
costs less (*prices may change depending on the seller, location and time) |
 Height |
330mm
vs
360mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
467cm2 (179x260mm)
vs
646cm2 (206x314mm)
|
Takes less floor space |
 USB Port |
USB-B
vs
No
|
USB port adds flexibility |
| General |
Triangle Borea Active BR02 BT |
Klipsch Reference R-51PM |
| Brand |
Triangle |
Klipsch |
| Speaker Type |
Powered Stereo Speakers |
Powered Stereo Speakers |
| Sensitivity |
90dB |
n/a |
| Impedance |
8 ohms |
n/a |
| Impedance |
4.2 ohms |
n/a |
| Frequency Response |
47-22kHz |
68-21k Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
120-watt RMS |
120-watt RMS |
| Watts Peak (Max) |
n/a |
240-watt RMS |
| Max Bit Depth |
24-bit |
24-bit |
| Max Sample Rate |
48 kHz |
96 kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
5.25" |
| Woofer Composition |
fiberglass |
Copper-spun IMG |
| Tweeter Size |
1" |
1.0" |
| Tweeter Type |
Dome |
Tractrix Horn |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
1663Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
360.0mm (14.2") |
330.2mm (13") |
| Width |
206.0mm (8.1") |
179.4mm (7.1") |
| Depth |
314.0mm (12.4") |
260.3mm (10.2") |
| Weight |
14.20kg (31.2lbs) |
4.80kg (10.6lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Available Colors |
Light Oak Blue,Oak Green,Cream,Light Oak,Black |
n/a |
| Mounting Bracket |
No |
No |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Aux Inputs |
3.5mm, RCA |
3.5mm, RCA |
| USB Port |
No |
USB-B |
| Phone Input |
Yes |
Yes |
| Subwoofer Output |
mono-RCA |
Wired |
| Digital Input |
Optical,Coaxial |
Optical |
| HDMI Input |
No |
No |
| Headphone Jack |
No |
No |
| Ethernet Port |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
1 Year |
| Labor Warranty |
5 Years |
1 Year |