KEF Q350 is a 2-way Passive Bass Reflex Bookshelf speaker by KEF. It features a 1" Dome Tweeter and 1 x 6.5" Aluminum Woofer.
Q350 features KEF's Uni-Q technology where its 1inch tweeter is placed in the acoustic center of the 6-1/2inch 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 63-28k Hz and a sensitivity of 87 dB. KEF Q350 has an MSRP of 750$ per pair but can often be found around 500$ per pair.
What size of room is the KEF Q350 speaker good for?
The size of the room in which you are planning to use the KEF Q350 is an important decision factor. Here we have evaluated its suitability to various sizes of environments considering its size and max power parameters:
| Listening Environment* |
Suitability |
| Near-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | Poor |
(* 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.)
What are the speakers in KEF's Q Series?
Q350 is a member of KEF's Q series of Passive speakers. Below you can see the main specs of these speakers.
KEF Q Series Speakers
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What is the Frequency Response of the KEF Q350 speaker?
KEF Q350 has a Frequency response range of 63-28k Hz at ±3dB (42Hz-50kHz at -6dB) and Power Range of 10-120 watts. At a minimum frequency of 63 Hz, it is hard to expect a strong bass response from Q350 so depending on your intended use, using a subwoofer will significantly help to widen the response range.
To focus on the subwoofers that are in a similar price range with KEF Q350, check out the Powered Subwoofers under $750. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how Q350's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
KEF Q350's vented aluminum Dome Tweeter
What is the Crossover frequency of KEF Q350?
The Crossover frequency of the Q350 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.
What are the Impedance and Sensitivity of the KEF Q350? Is it an easy-to-drive speaker?
KEF Q350's nominal impedance level is
8 ohms but can go down to as low as
3.7 ohms, and has a sensitivity of
87 dB.
Sensitivity
Bookshelf Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so KEF Q350 is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
With a sensitivity level of only 87 dB, KEF Q350 is a difficult to drive speaker from Sensitivity perspective, make sure to choose an amplifier with a high output if you like listening to your music at high volume levels. You may especially have a hard time using Tube amplifiers which are traditionally very low power compared to Class A/B or Class D speakers.
Minimum Impedance of KEF Q350
Even though the nominal impedance of the Q350 is 8 ohms, the minimum impedance level of this speaker according to KEF is 3.7 ohms KEF Q350 so while choosing an amplifier, you should ideally check if the unit you are considering can provide this impedance level.
Check the amplifiers that are in a similar price range to the KEF Q350:
Input Type
Q350 features Post type connectors. Bi-amping and Bi-wiring are not possible.
KEF Q350 Back View
KEF Q350 External Dimensions and Weight
KEF Q350 has external dimensions of (Height x Width x Depth) 14.0 x 8.2 x 12.0inch (358.0 x 210.0 x 306.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of KEF Q350 is approximately 642.6cm2 / 99.6inch2.
To get a better perspective on the real life size of KEF Q350, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).
KEF Q350 Speaker Size Compared to a Compact Disc
Here we place the KEF Q350 virtually next to a standard width amplifier and turntable on a BDI Octave Media Cabinet to get a better idea about the size.
KEF Q350 Speaker next to an amplifier and turntable
WeightThe KEF Q350 weighs 7.60kg / 16.7lbs per piece. Here is a comparison of how Q350's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
Weight
Bookshelf Speakers under $750
KEF Q350 on a Stand
Cabinet type and Materials
KEF Q350 has a
Bass Reflex type cabinet and a 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.
Speaker Feet
KEF Q350 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.
Port Position
KEF Q350 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. Q350 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.
Available colors
KEF Q350 is available in Black, Walnut and White.
Wall Mounting
Q350 doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Does the KEF Q350 come with a Grille?
Q350 comes with magnetic grilles in Black color choices. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible. Since the included grille of the Q350 is magnetic type, it is very easy to put it on and off.
KEF Q350 with Grille
What's in the Box of KEF Q350?
Here are the items that are included inside the box of Q350:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
User's Manual
For more information about how to setup, use and maintain the KEF Q350, use the direct link below to download the official manual document:
Download User Manual for KEF Q350
Official Brochure
Here is a link to download the official brochure for the KEF Q350 speaker:
Official Brochure for KEF Q350
Official Product Page
Official manufacturer's product page for the KEF Q350 speaker can be found below:
Official Product Page for KEF Q350
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.