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KEF Q350 vs KEF Q650c
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KEF Q350

Passive Bookshelf | 63-28k Hz

KEF Q350
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KEF Q650c

Passive Center Channel | 64-28k Hz

KEF Q650c
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KEF Q350 vs KEF Q650c Speaker Comparison

In this review, we will be comparing two different type of speakers by KEF. KEF Q350 is a Bookshelf speaker whereas the Q650c is a Center Channel speaker.

Let's have a brief look at the main features of KEF Q350 and KEF Q650c first before getting into our more detailed comparison.

KEF Q350 Key Specs

  • 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:7.60kg
  • Dimensions (H x W x D): 358.0" x 8.2" x 12.0"( 358.0 x 210.0 x 306.0mm )

KEF Q650c Key Specs

  • 11th Generation Uni-Q Driver
  • 1" Dome Tweeter
  • 2 x 6.5" aluminum Woofer
  • 64-28k Hz Frequency Response
  • 87 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:15-150watts
  • Weight:13.64kg
  • Dimensions (H x W x D): 212.0" x 24-13/16" x 11-15/16"( 212.0 x 631.0 x 304.0mm )

Q350 and Q650c are members of KEF's Q series of speakers. Below you can find the loudspeakers from this series.

KEF Q Series History
Model Body Frequency SensitivityImpedance Woofer
KEF Q150
  
Bookshelf 51-28k Hz 86 dB8Ω 1 x 5.25"
KEF Q350
Bookshelf 63-28k Hz 87 dB8Ω 1 x 6.5"
KEF Q750
  
Floor-standing 48-28k Hz 88 dB8Ω 2 x 6.5"
KEF Q950
  
Floor-standing 44-28k Hz 91 dB8Ω 2 x 8.0"
KEF Q550
  
Floor-standing 58-28k Hz 87 dB8Ω 2 x 5.25"
KEF Q650c
Center Channel 64-28k Hz 87 dB8Ω 2 x 6.5"
KEF Q250c
  
Center Channel 68-28k Hz 87 dB8Ω 1 x 5.25"

In the following sections, we will get into details in order to better understand how KEF Q350 and KEF Q650c compares and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.


**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.


Drivers

Both Q350 and Q650c 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, Q650c features a 1" vented aluminum Dome Tweeter and 2 x 6.5" aluminum Woofer with a Crossover frequency at 2500Hz.

Frequency Response

Q350 has a frequency range of 63-28k Hz whereas Q650c has a frequency range of 64-28k Hz. With a minimum frequency of 64Hz, the Q650c can go slightly deeper then 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.

Low Frequency

Bookshelf Speakers

KEF Q350
KEF Q650c
Min
Average
Max
High Frequency

Bookshelf Speakers

KEF Q350
KEF Q650c
Min
Average
Max

Impedance and Sensitivity

Q350 and Q650c has the same Impedance of 8 ohms and their sensitivity is also same at 87 dB.

Sensitivity

Bookshelf Speakers

KEF Q350
KEF Q650c
Min
Average
Max

Power Range

Q350 has a power range of 10-120 watts RMS whereas Q650c has a power range of 15-150 watts.

Input Type and Bi-Amping / Bi-Wiring

Q350 features Binding post type posts and Q650c has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.

KEF Q350 Terminals
KEF Q350's Post terminals

KEF Q650cBinding post Terminals
KEF Q650c's Binding post terminals

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 Q350's and KEF Q650c'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 Q650c has external dimensions of 212.0 x 631.0 x 304.0mm ( 8-5/16 x 24-13/16 x 11-15/16inch) .

KEF Q650c is 146mm shorter and 2mm less deeper than KEF Q350 but it is also 421mm wider.

Below you can see the front view size comparison of KEF Q350 and KEF Q650c in scale.

KEF Q350 vs KEF Q650c Size Comparison - Front View
Comparison image of KEF Q350 and KEF Q650c Size and External Dimensions


Reasons to choose KEF Q350 over KEF Q650c
Low Frequency Response 63 Hz vs 64 Hz Generates deeper bass
Width 210mm vs 631mm Easier to fit in smaller spaces
Reasons to choose KEF Q650c over KEF Q350
Max Input Power 150 watts vs 120 watts Handle more power from your amplifier
Minimum Impedance 4.2 ohms vs 3.7 ohms Very low impedance levels puts more pressure on amplifier
Number of Woofers 2 vs 1 More woofers
Passive Radiator one 6.5-inch vs None Increases the bass performance
Height 212mm vs 358mm Easier to fit in smaller spaces
Depth 304mm vs 306mm Easier to fit in smaller spaces

KEF Q350 vs KEF Q650c Specs Table
Detailed comparison of specifications
General KEF Q350 KEF Q650c
Brand KEF KEF
Speaker Type Bookshelf speakers Center channel speaker
Power Range 10-120 watts 15-150 watts
Sensitivity 87 dB 87 dB
Impedance 8 ohms 8 ohms
Impedance 3.7 ohms 4.2 ohms
Frequency Response 63-28k Hz 64-28k Hz
Drivers
Woofer Quantity 1 2
Woofer Size 6.5" 6.5"
Woofer Composition Aluminum aluminum
Woofer Surround Material Rubber Rubber
Tweeter Size 1" 1"
Tweeter Type Dome Dome
Aimable Tweeter No No
Midrange Driver No No
Crossover Frequency 2500Hz 2500Hz
Firing Direction rear n/a
Physical Specs
Height 358.0mm (14.1") 212.0mm (8.3")
Width 210.0mm (8.3") 631.0mm (24.8")
Depth 306.0mm (12") 304.0mm (12")
Weight 7.60kg (16.7lbs) 13.64kg (30lbs)
Enclosure Bass Reflex Passive Radiator
Finish MDF/Vinyl-wrapped n/a
Available Colors Black, Walnut, White Satin White, Satin Black, Walnut
Mounting Bracket No No
Recommended Stand Height 18-24" n/a
Grille magnetic optional
Moisture Resistancy No No
Connections
Biamp Inputs No n/a
Other
Parts Warranty 5 Years 5 Years
Labor Warranty 5 Years 5 Years


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