In this review, we will be comparing two different type of speakers by KEF. KEF Q150 is a Bookshelf speaker whereas the Q550 is a Floor-standing speaker.
Let's have a brief look at the main features of KEF Q150 and KEF Q550 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how KEF Q150 and KEF Q550 compares 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 Q550 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, Q550 features a 1" vented aluminum Dome Tweeter and 2 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Q150 has a frequency range of 51-28k Hz whereas Q550 has a frequency range of 58-28k Hz. With a minimum frequency of 51Hz, the Q150 can go significantly deeper on the low side and provide stronger bass compared to the Q550's min frequency of 58Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers under Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
Impedance and Sensitivity
Q150 and Q550 has the same Impedance of 8 ohms but where they differ is the sensitivity levels. Q150 sensitivity is rated at 86 dB and Q550's is at 87 dB. This 1 dB difference makes KEF Q550 a more sensitive speaker compared to KEF Q150, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf Speakers
Power Range
Q150 has a power range of 10-100 watts RMS whereas Q550 has a power range of 15-130 watts.
Input Type and Bi-Amping / Bi-Wiring
Q150 features Binding post type posts and Q550 has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
KEF Q150's Post terminals
Cabinet Type and Port Position
Q150 has a rear firing port whereas Q550 has a front firing ports. KEF Q550'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 KEF Q550'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 KEF Q550 has external dimensions of 894.0 x 296.0 x 313.0mm ( 35-3/16 x 11-5/8 x 12-5/16inch) .
KEF Q550 is clearly the larger of the two speakers. Its body is 116mm wider, 591mm taller and 35mm deeper than KEF Q150.
