In this review, we will be comparing R-51PM and S 801 PM, two Powered Bookshelf speakers from Klipsch and Jamo. 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 R-51PM and Jamo S 801 PM first before getting into our more
detailed comparison.
Klipsch R-51PM Key Specs
- 2-way Design
- 120-watt RMS( 240-watt Peak) Integrated Amplifier
- 1.0" Tractrix Horn Tweeter
- 5.25" Copper-spun IMG Woofer
- 68-21k Hz Frequency Response
- 24-bit Max Depth / 96 kHz Max Sample Rate
- Built-in 3.0 Bluetooth
- Weight:4.80kg
- Dimensions (H x W x D): 330.2" x 7.0625" x 10.25"( 330.2 x 179.4 x 260.3mm )
Jamo S 801 PM Key Specs
- 2-way Design
- 50-watt RMS( 100-watt Peak) Integrated Amplifier
- 1" Soft-Dome Tweeter
- 4" Polyfiber Woofer
- 76-26k Hz Frequency Response
- 24-bit Max Depth / 96 kHz Max Sample Rate
- Built-in 3.0 Bluetooth
- Dimensions (H x W x D): 285.8" x 6.1875" x 7.8125"( 285.8 x 157.2 x 198.4mm )
In the following sections, we will get into more detail in order to better understand how the Klipsch R-51PM and Jamo S 801 PM 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 R-51PM and S 801 PM are 2-way speakers.
| Driver |
Klipsch R-51PM |
Jamo S 801 PM |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1.0-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 4-inch
|
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. On the other hand, the S 801 PM features a 1" Silk Soft-Dome Tweeter and 1 x 4" Polyfiber Woofer .
Frequency Response
R-51PM has a frequency range of 68-21k Hz whereas S 801 PM has a frequency range of 76-26k Hz. With a minimum frequency of 68Hz, the R-51PM can go significantly deeper on the low side and provide stronger bass compared to the S 801 PM's min frequency of 76Hz.
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 R-51PM and S 801 PM 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 R-51PM's and Jamo S 801 PM's external dimensions. Klipsch R-51PM has external dimensions of 330.2 x 179.4 x 260.3mm ( 13 x 7.0625 x 10.25inch) whereas Jamo S 801 PM has external dimensions of 285.8 x 157.2 x 198.4mm ( 11.25 x 6.1875 x 7.8125inch) .
Klipsch R-51PM is clearly the larger of the two speakers. Its body is 22.2mm wider, 44.4mm taller and 61.9mm deeper than Jamo S 801 PM.
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 R-51PM is approximately 467.0cm2 / 72.4inch2 and base area of the Jamo S 801 PM is approximately 311.9cm2 / 48.3inch2. The R-51PM requires 50% more surface area than the S 801 PM which gives it a small disadvantage on placement in tight spaces.
What's in the Box of Klipsch R-51PM?
Here are the items that are included inside the box of R-51PM:
Powered speaker (right)Passive speaker (left)2 Grilles68-inch AC power cordRemote control2
What's in the Box of Jamo S 801 PM?
Here are the items that come with the S 801 PM:
Powered speaker (right) Passive speaker (left) 2 Grilles AC power adapter (attached 56-inch DC cord) AC plug insert Remote control 2 AAA batteries 6.5-feet Length of 18AWG speaker wire (bare tinned wire on each end) }6-feet USB-A to USB-B cable Instruction Booklet Important Safety Instructions
Woofer Size 
USB Port 
3.5mm Connection 
RCA Connection 
Phono Input 
High Frequency Response 
Height 
Base Surface Area 
Price per pair*