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KEF Q350 Review
KEF Q350

Main Features

  • 11th Generation Uni-Q Driver
  • 1" Dome Tweeter
  • 6.5" Aluminum Woofer
  • 63-28k Hz Frequency Response
  • 87 dB Sensitivity
  • Impedance: 8ohms
  • Power Range: 10-120watts
  • Weight:16.72 lbs / 7.60 kg
  • Dimensions(HxWxD): 14.0"x8.2"x12.0" / 358.0 x 210.0 x 306.0mm
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KEF Q350 Review

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-fieldPoor
Small RoomAverage
Mid-size RoomGood
Large RoomAverage
Very Large RoomPoor

(* 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
Model Frequency SensitivityImpedance Woofer
KEF Q150
Compare
51-28k Hz 86 dB8Ω 1 x 5.25"
KEF Q350
63-28k Hz 87 dB8Ω 1 x 6.5"
KEF Q950
Compare
44-28k Hz 91 dB8Ω 2 x 8.0"
KEF Q750
Compare
48-28k Hz 88 dB8Ω 2 x 6.5"
KEF Q550
Compare
58-28k Hz 87 dB8Ω 2 x 5.25"
KEF Q650c
Compare
64-28k Hz 87 dB8Ω 2 x 6.5"
KEF Q250c
Compare
68-28k Hz 87 dB8Ω 1 x 5.25"
KEF Q Series Speakers
KEF Q Series Speakers


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

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
KEF Q350
Min
Average
Max
High Frequency
Bookshelf Speakers
KEF Q350
Min
Average
Max


KEF Q350 Tweeter
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
KEF Q350
Min
Average
Max

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:

  • Integrated Amps under 500 USD
  • Integrated Amps under 750 USD
  • Integrated Amps under 1000 USD
  • All Integrated Amplifiers

Input Type

Q350 features Post type connectors. Bi-amping and Bi-wiring are not possible.
KEF Q350 Back View
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 Real Life Body Size Comparison
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 placed next to an amplifier and turntable
KEF Q350 Speaker next to an amplifier and turntable

Weight

The 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
KEF Q350
Min
Average
Max
Weight
Bookshelf Speakers under $750
KEF Q350
Min
Average
Max
KEF Q350  on a Stand
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
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.

    KEF Q350 Alternatives in Passive Bookshelf Speakers
    Model Type Sensitivity Impedance Frequency
    Klipsch R-51M
    Compare
    2-way 93 dB 8 ohms 62-21k Hz
    B&W 606
    Compare
    2-way 88 dB 8 ohms 52-28k Hz
    ELAC Debut 2.0 B6.2
    Compare
    2-way 87 dB 6 ohms 44-35k Hz
    B&W 606 S2
    Compare
    2-way 88 dB 8 ohms 52-28k Hz
    Klipsch RP-500M
    Compare
    2-way 93 dB 8 ohms 48-25k Hz
    Wharfedale EVO4.1
    Compare
    2-way 87 dB 8 ohms 64-22k Hz
    Klipsch RP-400M
    Compare
    2-way 93 dB 8 ohms 52-25k Hz
    KEF Q150
    Compare
    2-way 86 dB 8 ohms 51-28k Hz
    Klipsch RP-600M
    Compare
    2-way 96 dB 8 ohms 45-25k Hz
    Polk ES20
    Compare
    2-way 86 dB 8 ohms 41-40k Hz
    Frequently Asked Questions about KEF Q350
    What is the External Dimensions of KEF Q350
    What is the Speaker Sensitivity of KEF Q350
    is the KEF Q350 an easy to drive speaker?



    KEF Q350 Detailed Specifications

    General
    BrandKEF
    Full Model NameKEF Q350
    Speaker Type2-way Bookshelf
    Power Range10-120 watts
    Sensitivity87 dB
    Impedance8 ohms
    Max SPL110 dB
    Frequency Response63-28k Hz
    DRIVERS
    Woofer Size6.5-inch
    Woofer CompositionAluminum
    Woofer SurroundRubber
    Tweeter Size1-inch
    Tweeter TypeDome
    Crossover freq2500Hz
    Port Positionrear

    CONNECTIONS
    Connector TypePost
    Biamp InputsNo
    Port Positionrear
    PHYSICAL SPECS
    Height358.0mm ( 14.0-inch)
    Width210.0mm ( 8.2-inch)
    Depth306.0mm ( 12.0-inch)
    Height358.0mm ( 14.0-inch)
    Weight7.60kg ( 16.72 lbs)
    EnclosureBass Reflex
    FinishMDF/Vinyl-wrapped
    Available ColorsBlack, Walnut, White
    Mounting BracketNo
    Recommended Stand Height18-24
    GrilleYes
    Moisture ResistanceNo
    OTHER
    Handheld RemoteNo
    Parts Warranty5 Years
    Labor Warranty5 Years
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