In this review, we will be comparing Sonetto II and Q150, two Passive Bookshelf speakers from Sonus Faber and KEF. Let's have a brief look at the main features
of Sonus Sonetto II and KEF Q150 first before getting into our more
detailed comparison.
What size room are the Sonus Sonetto II 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 Sonus Sonetto II 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 Sonetto II and Q150 are 2-way speakers.
| Driver |
Sonus Sonetto II |
KEF Q150 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1.15-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 5.25-inch
|
Sonetto II features a 1.15" high definition DAD Dome Tweeter and 1 x 6.5" cellulose pulp and other natural fibers Woofer with a Crossover frequency at 2650 Hz. 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
Sonetto II has a frequency range of 42-25k Hz whereas Q150 has a frequency range of 51-28k Hz. With a minimum frequency of 42Hz, the Sonetto II can go significantly deeper on the low side and provide stronger bass compared to the Q150's min frequency of 51Hz.
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
Sonetto II is a 4 ohms speaker compared to the Q150 which has a nominal impedance of 8 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the Sonetto II can provide this impedance level.
These two speakers also have different sensitivity levels. Sonetto II sensitivity is rated at 87 dB and the Q150's is rated at 86 dB. This 1 dB difference makes the Sonus Sonetto II 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.
Sonetto II can handle a max power of 200 watts RMS from the amp the whereas Q150 has a max power handling value of 100 watts RMS, 100 watts less than the Sonetto II.
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
Sonetto II features Binding post posts which make bi-amping or bi-wiring possible. Q150 has a Post which doesn't feature bi-amping/bi-wiring.
KEF Q150's Post terminals
Cabinet Type and Port Position
Sonetto II has a front firing port whereas Q150 has a rear firing ports. Sonus Sonetto II's front-firing port gives more flexibility in placement in regards to proximity to walls compared to KEF Q150 with its rear-firing port.
KEF Q150 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 Sonus Sonetto II's and KEF Q150's external dimensions. Sonus Sonetto II has external dimensions of 370.0 x 250.0 x 334.0mm ( 15 x 10 x 13inch) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) .
Sonus Sonetto II is clearly the larger of the two speakers. Its body is 70mm wider, 67mm taller and 56mm deeper than KEF Q150.
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 Sonus Sonetto II is approximately 835.0cm2 / 129.4inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The Sonetto II requires 67% more surface area than the Q150 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 Sonus Sonetto II weighs 6.80kg / 15lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Sonetto II 21% heavier than the Q150.
Here is a comparison of how Sonetto II 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 Sonus Sonetto II?
Here are the items that are included inside the box of Sonetto II:
2 Masks2 Fabric dust guards2 Jumpers1 Manual
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
 Max Input Power |
200 watts
vs
100 watts
|
Handle more power from your amplifier |
 Sensitivity |
87 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
42 Hz
vs
51 Hz
|
Generates deeper bass |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Port Position |
Front
vs
Rear
|
Gives more flexibility placing close to walls |
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
 High Frequency Response |
28k Hz
vs
25k Hz
|
Generates higher frequency |
 Height |
303mm
vs
370mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
500cm2 (180x278mm)
vs
835cm2 (250x334mm)
|
Takes less floor space |
| General |
Sonus Faber Sonetto II |
KEF Q150 |
| Brand |
Sonus Faber |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
40-200 watts |
10-100 watts |
| Sensitivity |
87 dB |
86 dB |
| Impedance |
4 ohms |
8 ohms |
| Impedance |
n/a |
3.7 ohms |
| Frequency Response |
42-25k Hz |
51-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
5.25" |
| Woofer Composition |
cellulose pulp and other natural fibers |
Aluminum |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
1.15" |
1" |
| Tweeter Type |
high definition DAD Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2650 Hz |
2500Hz |
| Firing Direction |
front |
rear |
Physical Specs |
|
|
| Height |
370.0mm (14.6") |
303.0mm (11.9") |
| Width |
250.0mm (9.8") |
180.0mm (7.1") |
| Depth |
334.0mm (13.1") |
278.0mm (10.9") |
| Weight |
6.80kg (15lbs) |
5.60kg (12.3lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
n/a |
MDF/Vinyl-wrapped |
| Available Colors |
Wood, White, Black, Wenge |
Black, Walnut, White |
| Mounting Bracket |
|
No |
| Recommended Stand Height |
n/a |
18-24" |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
|
5 Years |
| Labor Warranty |
|
5 Years |