In this review, we will be comparing Debut 2.0 B5.2 and Q150, two Passive Bookshelf speakers from ELAC and KEF. Let's have a brief look at the main features
of ELAC Debut 2.0 B5.2 and KEF Q150 first before getting into our more
detailed comparison.
ELAC Debut 2.0 B5.2 Key Specs
- 2-way Design
- 1" Soft-dome Tweeter
- 5.25" Woven Aramid-Fiber Woofer
- 46-35k Hz Frequency Response
- 86 dB Sensitivity
- Impedance: 6ohms
- Power Range:120watts
- Weight:5.90kg
- Dimensions (H x W x D): 341.0" x 7.0" x 9.2"( 341.0 x 180.0 x 234.0mm )
KEF Q150 Key Specs
- 2-way Design
- 11th Generation Uni-Q Driver
- 1" Dome Tweeter
- 5.25" Aluminum Woofer
- 51-28k Hz Frequency Response
- 86 dB Sensitivity
- Impedance: 8ohms
- Power Range:10-100watts
- Weight:5.60kg
- Dimensions (H x W x D): 303.0" x 7.0" x 10.9"( 303.0 x 180.0 x 278.0mm )
What size room are the ELAC Debut 2.0 B5.2 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:
| Listening Environment* |
ELAC Debut 2.0 B5.2 |
KEF Q150 |
| Near-field |
Poor |
Average |
| Small Room |
Average |
Good |
| Mid-size Room |
Good |
Average |
| Large Room |
Average |
Poor |
| Very Large Room |
Poor |
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 ELAC Debut 2.0 B5.2 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 Debut 2.0 B5.2 and Q150 are 2-way speakers.
| Driver |
ELAC Debut 2.0 B5.2 |
KEF Q150 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 5.25-inch
|
Debut 2.0 B5.2 features a 1" Cloth Soft-dome Tweeter and 1 x 5.25" Woven Aramid-Fiber Woofer with a Crossover frequency at 2200Hz. 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
Debut 2.0 B5.2 has a frequency range of 46-35k Hz whereas Q150 has a frequency range of 51-28k Hz. With a minimum frequency of 46Hz, the Debut 2.0 B5.2 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
Debut 2.0 B5.2 is a 6 ohms speaker compared to the Q150 which has a nominal impedance of 8 ohms.
On the other hand, they have the same sensitivity of 86 dBdB.
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.
Debut 2.0 B5.2 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 B5.2.
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
Debut 2.0 B5.2 features Post type posts and Q150 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
ELAC Debut 2.0 B5.2's 5-Way Metal post terminals
KEF Q150's Post terminals
Cabinet Type and Port Position
Debut 2.0 B5.2 has a front firing port whereas Q150 has a rear firing ports. ELAC Debut 2.0 B5.2'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 ELAC Debut 2.0 B5.2's and KEF Q150's external dimensions. ELAC Debut 2.0 B5.2 has external dimensions of 341.0 x 180.0 x 234.0mm ( 13.4 x 7.0 x 9.2inch) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) .
Below you can see the front view size comparison of ELAC Debut 2.0 B5.2 and KEF Q150 in scale.
Comparison image of ELAC Debut 2.0 B5.2 and KEF Q150 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 ELAC Debut 2.0 B5.2 is approximately 421.2cm2 / 65.3inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The Debut 2.0 B5.2 requires 16% 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:
Size Comparison image of ELAC Debut 2.0 B5.2 and KEF Q150 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 ELAC Debut 2.0 B5.2 weighs 5.90kg / 13lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Debut 2.0 B5.2 5% heavier than the Q150.
Here is a comparison of how Debut 2.0 B5.2 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 ELAC Debut 2.0 B5.2?
Here are the items that are included inside the box of Debut 2.0 B5.2:
2 Bookshelf loudspeakers 2 Grilles Operating Instructions
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