In this review, we will be comparing S 803 and Q150, two Passive Bookshelf speakers from Jamo and KEF. Let's have a brief look at the main features
of Jamo S 803 and KEF Q150 first before getting into our more
detailed comparison.
What size room are the Jamo S 803 and KEF Q150 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:
In the following sections, we will get into more detail in order to better understand how the Jamo S 803 and KEF Q150 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 803 and Q150 are 2-way speakers.
Driver |
Jamo S 803 |
KEF Q150 |
Driver Setup
|
2-way
|
2-way
|
Tweeter
|
1-inch
|
1-inch
|
Midrange
|
- |
- |
Woofer
|
1 x 5-inch
|
1 x 5.25-inch
|
S 803 features a 1" Soft-Dome Tweeter and 1 x 5" Aluminized Polyfiber Woofer . On the other hand, the Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
S 803 has a frequency range of 57-26k Hz whereas Q150 has a frequency range of 51-28k Hz. With a minimum frequency of 51Hz, the Q150 can go significantly deeper on the low side and provide stronger bass compared to the S 803's min frequency of 57Hz.
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.
Impedance and Sensitivity
S 803 and Q150 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. S 803 sensitivity is rated at 87 dB and the Q150's is at 86 dB. This 1 dB difference makes the Jamo S 803 a more sensitive speaker compared to KEF Q150, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf 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 803 can handle a max power of 100 watts RMS from the amp the whereas S 803 has a max power handling value of 80 watts RMS , 20 watts less than the Q150.
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 803 features Post type posts and Q150 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
S 803 has a front firing port whereas Q150 has a rear firing ports. Jamo S 803's front-firing port gives more flexibility in placement in regards to proximity to walls compared to KEF Q150 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 803's and KEF Q150's external dimensions. Jamo S 803 has external dimensions of 353.0 x 191.0 x 252.0mm ( 13.8 x 7.5 x 9.9inch) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) .
KEF Q150 is 11mm narrower and 50mm shorter than Jamo S 803 but it is also 26mm deeper.
Below you can see the front view size comparison of Jamo S 803 and KEF Q150 in scale.
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 803 is approximately 481.3cm2 / 74.6inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The S 803 requires 4% less surface area than the Q150 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:
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 Jamo S 803 weighs 5.40kg / 11.9lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Q150 4% heavier than the S 803.
Here is a comparison of how S 803 and Q150's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Jamo S 803?
Here are the items that are included inside the box of S 803:
2 Bookshelf loudspeakers 2 Grilles User Manual Important Safety Instructions Warranty Information
What's in the Box of KEF Q150?
Here are the items that come with the Q150:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
Sensitivity |
87 dB
vs
86 dB
|
Play louder with same amount of amplification power |
Port Position |
Front
vs
Rear
|
Gives more flexibility placing close to walls |
Base Surface Area |
481cm2 (191x252mm)
vs
500cm2 (180x278mm)
|
Takes less floor space |
Price per pair* |
229USD
vs
600USD
|
costs less (*prices may change depending on the seller, location and time) |
Max Input Power |
100 watts
vs
80 watts
|
Handle more power from your amplifier |
Woofer Size |
5.25 inches
vs
5 inches
|
Larger woofer |
Low Frequency Response |
51 Hz
vs
57 Hz
|
Generates deeper bass |
High Frequency Response |
28k Hz
vs
26k Hz
|
Generates higher frequency |
Height |
303mm
vs
353mm
|
Easier to fit in smaller spaces |
General |
Jamo S 803 |
KEF Q150 |
Brand |
Jamo |
KEF |
Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
Power Range |
up to 80 watts |
10-100 watts |
Sensitivity |
87 dB |
86 dB |
Impedance |
8 ohms |
8 ohms |
Impedance |
n/a |
3.7 ohms |
Frequency Response |
57-26k Hz |
51-28k Hz |
Drivers |
|
|
Woofer Quantity |
1 |
1 |
Woofer Size |
5" |
5.25" |
Woofer Composition |
Aluminized Polyfiber |
Aluminum |
Woofer Surround Material |
Rubber |
Rubber |
Tweeter Size |
1" |
1" |
Tweeter Type |
Soft-Dome |
Dome |
Aimable Tweeter |
No |
No |
Midrange Driver |
No |
No |
Crossover Frequency |
n/a |
2500Hz |
Firing Direction |
front |
rear |
Physical Specs |
|
|
Height |
353.0mm (13.9") |
303.0mm (11.9") |
Width |
191.0mm (7.5") |
180.0mm (7.1") |
Depth |
252.0mm (9.9") |
278.0mm (10.9") |
Weight |
5.40kg (11.9lbs) |
5.60kg (12.3lbs) |
Enclosure |
Bass Reflex |
Bass Reflex |
Finish |
MDF/Vinyl |
MDF/Vinyl-wrapped |
Available Colors |
Walnut, Black, White |
Black, Walnut, White |
Mounting Bracket |
No |
No |
Recommended Stand Height |
24-28" |
18-24" |
Grille |
Yes |
Yes |
Moisture Resistancy |
No |
No |
Connections |
|
|
Biamp Inputs |
No |
No |
Other |
|
|
Parts Warranty |
5 Years |
5 Years |
Labor Warranty |
5 Years |
5 Years |