In this review, we will be comparing two different type of speakers by KEF. KEF Q650c is a Center Channel speaker whereas the Q350 is a Bookshelf speaker.
Let's have a brief look at the main features
of KEF Q650c and KEF Q350 first before getting into our more
detailed comparison.
Q650c and Q350 are members of KEF's Q series of speakers. Below you can find the loudspeakers from this series.
What size of room is the KEF Q650c and KEF Q350 speakers good for?
The size of the room that you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various size of environments considering their size and max power parameters:
In the following sections, we will get into details in order to better understand how KEF Q650c and KEF Q350 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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Drivers
Both Q650c and Q350 are 2-way speakers. Q650c features a 1" vented aluminum Dome Tweeter and 2 x 6.5" aluminum Woofer with a Crossover frequency at 2500Hz. On the other hand, Q350 features a 1" vented aluminum Dome Tweeter and 1 x 6.5" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Q650c has a frequency range of 64-28k Hz whereas Q350 has a frequency range of 63-28k 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 Center Channel class in our database.
Low Frequency
Center Channel Speakers
High Frequency
Center Channel Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you to pair these with a subwoofer.Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Q650c and Q350 has the same Impedance of 8 ohms and their sensitivity is also same at 87 dB.
Sensitivity
Center Channel Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
Q650c can handle a max power of 150 watts RMS from the amp the whereas Q350 has a max power handling value of 120 watts RMS, 30 watts less than the Q650c.
Keep in mind that higher max power handling value doesn't necesssarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impededance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
Q650c features Post type posts and Q350 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
KEF Q650c's Binding post terminals
KEF Q350's 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 Q650c's and KEF Q350's external dimensions. 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) whereas KEF Q350 has external dimensions of 358.0 x 210.0 x 306.0mm ( 14.0 x 8.2 x 12.0inch) .
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 Q650c and KEF Q350 in scale.
Comparison image of KEF Q650c and KEF Q350 Size and External Dimensions
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the KEF Q650c is approximately 1918.2cm2 / 297.3inch2 and base area of the KEF Q350 is approximately 642.6cm2 / 99.6inch2. The Q650c requires 199% more surface area than the Q350 which gives it a small disadvantage on placement in tight spaces.
What's in the Box of KEF Q650c?
Here are the items that are included inside the box of Q650c:
Center-channel loudspeaker 4 Self-adhesive rubber feet Owners Manual Warranty Information
What's in the Box of KEF Q350?
Here are the items that come with the Q350:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card