In this review, we will be comparing Q350 and Q150, two Passive Bookshelf speakers by KEF. Let's have a brief look at the main features of KEF Q350 and KEF Q150 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how KEF Q350 and KEF Q150 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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Both Q350 and Q150 are 2-way speakers. Q350 features a 1" vented aluminum Dome Tweeter and 1 x 6.5" Aluminum Woofer with a Crossover frequency at 2500Hz. On the other hand, Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Q350 has a frequency range of 63-28k 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 Q350's min frequency of 63Hz.
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.
Impedance and Sensitivity
Q350 and Q150 has the same Impedance of 8 ohms but where they differ is the sensitivity levels. Q350 sensitivity is rated at 87 dB and Q150's is at 86 dB. This 1 dB difference makes KEF Q350 a more sensitive speaker compared to KEF Q150, hence will play louder with the same amount of watts.
Q350 has a power range of 10-120 watts RMS whereas Q150 has a power range of 10-100 watts.
Input Type and Bi-Amping / Bi-Wiring
Q350 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
Both Q350 and Q150 have rear firing ports. Rear ported speakers generlly need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing too close to the walls may cause the bass to sound boomy.
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 Q350's and KEF Q150's external dimensions. KEF Q350 has external dimensions of 358.0 x 210.0 x 306.0mm ( 14.0 x 8.2 x 12.0inch) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) .
KEF Q350 is clearly the larger of the two speakers. Its body is 30mm wider, 55mm taller and 28mm deeper than KEF Q150.
Below you can see the front view size comparison of KEF Q350 and KEF Q150 in scale.
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: