Q150 is a 2-way Passive Bass Reflex Bookshelf speaker by KEF. It features a 1" Dome Tweeter and 1 x 5.25" Aluminum Woofer.
Q150 features KEF's Uni-Q technology where its 1inch tweeter is placed in the acoustic center of the 5-1/4inch woofer. With the help of this unique design, sound comes from a single point of source making the ideal listening position (aka sweet spot) of this speaker much larger.The speaker has a frequency range of 51-28k Hz and a sensitivity of 86 dB. KEF Q150 has an MSRP of 600$ per pair but can often be found around 300$ per pair.
Q150 is a member of KEF's Q series of Passive speakers. Below you can see the main specs of these speakers.
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KEF Q150 has a Frequency response range of 51-28k Hz at ±3dB (47Hz-50kHz at -6dB) and Power Range of 10-100 watts. At a minimum frequency of 51 Hz, Q150 will provide an average bass depth so depending on your use case, you may consider supplementing your system with a subwoofer.
Here we have a comparison of how Q150's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Among the speakers in our database with a max MSRP price of 750$ (Pair), these are the 5 Passive Bookshelf speakers that have the deeper bass levels than the KEF Q150's 51Hz:
What is the Crossover frequency of KEF Q150?
Crossover frequency of the Q150 is set to 2500Hz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower frequency signals are sent to the woofer by the crossover component.
Impedance and Sensitivity
KEF Q150's nominal impedance level is 8 ohms but can go down to as low as 3.7 ohms, and has a sensitivity of 86 dB.
Is the KEF Q150 an easy to drive speaker?
8 Ohms is pretty much the standard impedance amongst stereo speakers and amplifiers so KEF Q150 is not considered a difficult to drive speaker from nominal Impedance perspective. With a sensitivity level of only 86 dB, KEF Q150 is a difficult to drive speaker from Sensitivity perspective, make sure to choose an amplifier with hogh output if you like listening your music at high volume levels.
Minimum Impedance of KEF Q150
Even though the nominal impedance of the Q150 is 8 ohms, the minimum impedance level of this speaker according to KEF is 3.7 ohms KEF Q150 so while choosing an amplifier, you should ideally check if the unit you are considering can provide this impedance level.
Q150 features Post type connectors. Bi-amping and Bi-wiring is not possible.
KEF Q150 Speaker Size: Weight and Dimensions
KEF Q150 has external dimensions of (Height x Width x Depth) 11.9 x 7.0 x 10.9inch (303.0 x 180.0 x 278.0mm ). Each speaker weighs 5.60kg / 12.3lbs.
To have a better perspective on the real life size of KEF Q150, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).
Here we place the KEF Q150 virtually next to a standard width amplifier and turntable on a BDI Octave Media Cabinet to get a better idea about the size.
Cabinet type and Materials
KEF Q150 has a Bass Reflex
type cabinet and MDF/Vinyl-wrapped finish. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
KEF Q150 comes with 8 Self-adhesive rubber feet
which you can use to secure your loudspeaker on the surface that you are putting on. It is always recommended to use some kind of feet under all types of speakers. Besides limiting the movement of the speakers, it also compensates for non-flat surfaces and limits the contact surface area of the speaker. Rubber based feet also help isolating the vibrations within certain frequency ranges.
KEF Q150 is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe. Q150 comes with 2 Foam port plugs
so if you don't have any choice but place the speakers too close to the walls or other surfaces, you can use these plugs in order to avoid boomy or too much bass.
KEF Q150 is available in Black, Walnut, White.
Q150 doesn't sport any built-in mounting bracket so you need an external structure to mount on walls.
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
For more information about how to setup, use and maintain the KEF Q150, use the direct link below to download the official manual document:
Download User Manual for KEF Q150
Here is a link to download the official brochure for the KEF Q150 speaker:
Official Brochure for KEF Q150
Official Product Page
Official manufacturer's product page for the KEF Q150 speaker can be found below:
Official Product Page for KEF Q150
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.