In this review, we will be comparing two different type of speakers by Jamo. Jamo S 81 CEN is a Center Channel speaker whereas the S 803 is a Bookshelf speaker.
Let's have a brief look at the main features
of Jamo S 81 CEN and Jamo S 803 first before getting into our more
detailed comparison.
Jamo S 81 CEN Key Specs
- 2-way Design
- 1" soft dome with an integrated waveguide Tweeter
- 2 x 4" polyfiber Woofer
- 71-26k Hz Frequency Response
- 86 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 60watts
- Weight:5.00kg
- Dimensions (H x W x D): 186.0" x 17-1/8" x 8-11/16"( 186.0 x 435.0 x 221.0mm )
Jamo S 803 Key Specs
- 2-way Design
- 1" Soft-Dome Tweeter
- 5" Aluminized Polyfiber Woofer
- 57-26k Hz Frequency Response
- 87 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 80watts
- Weight:5.40kg
- Dimensions (H x W x D): 353.0" x 7.5" x 9.9"( 353.0 x 191.0 x 252.0mm )
S 81 CEN and S 803 are members of Jamo's Studio 8 series of speakers. Below you can find the loudspeakers from this series.
What size room are the Jamo S 81 CEN and Jamo S 803 speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:
| Listening Environment* |
Jamo S 81 CEN |
Jamo S 803 |
| Near-field |
Good |
Average |
| Small Room |
Good |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Poor |
| Very Large Room |
No way |
Bad |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
In the following sections, we will get into more detail in order to better understand how the Jamo S 81 CEN and Jamo S 803 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 S 81 CEN and S 803 are 2-way speakers.
| Driver |
Jamo S 81 CEN |
Jamo S 803 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 4-inch
|
1 x 5-inch
|
S 81 CEN features a 1" soft dome with an integrated waveguide Tweeter and 2 x 4" polyfiber Woofer with a Crossover frequency at 2000Hz. On the other hand, the S 803 features a 1" Soft-Dome Tweeter and 1 x 5" Aluminized Polyfiber Woofer .
Frequency Response
S 81 CEN has a frequency range of 71-26k Hz whereas S 803 has a frequency range of 57-26k Hz. With a minimum frequency of 57Hz, the S 803 can go significantly deeper on the low side and provide stronger bass compared to the S 81 CEN's min frequency of 71Hz.
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 Center Channel class in our database.
Low Frequency
Center Channel Speakers
High Frequency
Center Channel 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.
Impedance and Sensitivity
S 81 CEN and S 803 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. S 81 CEN sensitivity is rated at 86 dB and the S 803's is at 87 dB. This 1 dB difference makes the Jamo S 803 a more sensitive speaker compared to Jamo S 81 CEN, hence will play louder with the same amount of watts.
Sensitivity
Center Channel Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
S 81 CEN can handle a max power of 80 watts RMS from the amp the whereas S 81 CEN has a max power handling value of 60 watts RMS , 20 watts less than the S 803.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
S 81 CEN features Post type posts and S 803 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
Jamo S 81 CEN's Binding post terminals
Jamo S 803's Post terminals
Cabinet Type and Port Position
S 81 CEN has a rear firing port whereas S 803 has a front firing ports. Jamo S 803's front-firing port gives more flexibility in placement in regards to proximity to walls compared to Jamo S 81 CEN with its rear-firing port.
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 Jamo S 81 CEN's and Jamo S 803's external dimensions. Jamo S 81 CEN has external dimensions of 186.0 x 435.0 x 221.0mm ( 7-5/16 x 17-1/8 x 8-11/16inch) whereas Jamo S 803 has external dimensions of 353.0 x 191.0 x 252.0mm ( 13.8 x 7.5 x 9.9inch) .
Jamo S 81 CEN is 167mm shorter and 31mm less deeper than Jamo S 803 but it is also 244mm wider.
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 Jamo S 81 CEN is approximately 961.4cm2 / 149.0inch2 and base area of the Jamo S 803 is approximately 481.3cm2 / 74.6inch2. The S 81 CEN requires 100% more surface area than the S 803 which gives it a small disadvantage on placement in tight spaces.
What's in the Box of Jamo S 81 CEN?
Here are the items that are included inside the box of S 81 CEN:
Center-channel loudspeaker Grille User Manual Important Safety Instructions Warranty Information
What's in the Box of Jamo S 803?
Here are the items that come with the S 803:
2 Bookshelf loudspeakers 2 Grilles User Manual Important Safety Instructions Warranty Information
Number of Woofers 
Height 
Price per pair* 
Max Input Power 
Sensitivity 
Port Position 
Base Surface Area