In this review, we will be comparing Q150 and Debut 2.0 B6.2, two Passive Bookshelf speakers from KEF and ELAC. Let's have a brief look at the main features
of KEF Q150 and ELAC Debut 2.0 B6.2 first before getting into our more
detailed comparison.
What size room are the KEF Q150 and ELAC Debut 2.0 B6.2 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 KEF Q150 and ELAC Debut 2.0 B6.2 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 Q150 and Debut 2.0 B6.2 are 2-way speakers. Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz. On the other hand, the Debut 2.0 B6.2 features a 1" Cloth Soft-Dome Tweeter and 1 x 6.5" Woven Aramid-Fiber Woofer with a Crossover frequency at 2200Hz.
Frequency Response
Q150 has a frequency range of 51-28k Hz whereas Debut 2.0 B6.2 has a frequency range of 44-35k Hz. With a minimum frequency of 44Hz, the Debut 2.0 B6.2 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
Q150 is a 8 ohms speaker compared to the Debut 2.0 B6.2 which has a nominal impedance of 6 ohms.
These two speakers also have different sensitivity levels. Q150 sensitivity is rated at 86 dB and the Debut 2.0 B6.2's is rated at 87 dB. This 1 dB difference makes the ELAC Debut 2.0 B6.2 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.
Q150 can handle a max power of 120 watts RMS from the amp the whereas Q150 has a max power handling value of 100 watts RMS , 20 watts less than the Debut 2.0 B6.2.
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
Q150 features 5-Way post type posts and Debut 2.0 B6.2 has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
KEF Q150's Post terminals
ELAC Debut 2.0 B6.2's 5-Way post terminals
Cabinet Type and Port Position
Q150 has a rear firing port whereas Debut 2.0 B6.2 has a front firing ports. ELAC Debut 2.0 B6.2'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 KEF Q150's and ELAC Debut 2.0 B6.2's external dimensions. KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) whereas ELAC Debut 2.0 B6.2 has external dimensions of 375.0 x 195.0 x 268.0mm ( 14.7 x 7.6 x 10.5inch) .
KEF Q150 is 15mm narrower and 72mm shorter than ELAC Debut 2.0 B6.2 but it is also 10mm deeper.
Below you can see the front view size comparison of KEF Q150 and ELAC Debut 2.0 B6.2 in scale.
Comparison image of KEF Q150 and ELAC Debut 2.0 B6.2 Size and External Dimensions
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 KEF Q150 is approximately 500.4cm2 / 77.6inch2 and base area of the ELAC Debut 2.0 B6.2 is approximately 522.6cm2 / 81.0inch2. The Q150 requires 4% less surface area than the Debut 2.0 B6.2 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:
Size Comparison image of KEF Q150 and ELAC Debut 2.0 B6.2 on a Media Console
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 KEF Q150 weighs 5.60kg / 12.3lbs and the ELAC Debut 2.0 B6.2 weighs 7.40kg / 16.3lbs. This makes the Debut 2.0 B6.2 32% heavier than the Q150.
Here is a comparison of how Q150 and Debut 2.0 B6.2's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of KEF Q150?
Here are the items that are included inside the box of Q150:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
What's in the Box of ELAC Debut 2.0 B6.2?
Here are the items that come with the Debut 2.0 B6.2:
2 Bookshelf loudspeakers2 GrillesOperating Instructions
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Height |
303mm
vs
375mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
500cm2 (180x278mm)
vs
522cm2 (195x268mm)
|
Takes less floor space |
 Max Input Power |
120 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 |
44 Hz
vs
51 Hz
|
Generates deeper bass |
 High Frequency Response |
35k Hz
vs
28k Hz
|
Generates higher frequency |
 Port Position |
Front
vs
Rear
|
Gives more flexibility placing close to walls |
 Price per pair* |
400USD
vs
600USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
KEF Q150 |
ELAC Debut 2.0 B6.2 |
| Brand |
KEF |
ELAC |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
10-100 watts |
up to 120 watts |
| Sensitivity |
86 dB |
87 dB |
| Impedance |
8 ohms |
6 ohms |
| Impedance |
3.7 ohms |
n/a |
| Frequency Response |
51-28k Hz |
44-35k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
6.5" |
| Woofer Composition |
Aluminum |
Woven Aramid-Fiber |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Dome |
Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2500Hz |
2200Hz |
| Firing Direction |
rear |
front |
Physical Specs |
|
|
| Height |
303.0mm (11.9") |
375.0mm (14.8") |
| Width |
180.0mm (7.1") |
195.0mm (7.7") |
| Depth |
278.0mm (10.9") |
268.0mm (10.6") |
| Weight |
5.60kg (12.3lbs) |
7.40kg (16.3lbs) |
| Enclosure |
Bass Reflex |
Ported |
| Finish |
MDF/Vinyl-wrapped |
MDF/Vinyl |
| Available Colors |
Black, Walnut, White |
Black |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
18-24" |
24-28" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
3 Years |
| Labor Warranty |
5 Years |
3 Years |