In this review, we will be comparing Q650c and Demand D5C, two Passive Center Channel speakers from KEF and Definitive Technology. Let's have a brief look at the main features
of KEF Q650c and Definitive D5C first before getting into our more
detailed comparison.
What size room are the KEF Q650c and Definitive D5C speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:
In the following sections, we will get into more detail in order to better understand how the KEF Q650c and Definitive D5C compare 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 Q650c and Demand D5C are 2-way speakers.
Driver |
KEF Q650c |
Definitive D5C |
Driver Setup
|
2-way
|
2-way
|
Tweeter
|
1-inch
|
1-inch
|
Midrange
|
- |
- |
Woofer
|
2 x 6.5-inch
|
2 x 5.25-inch
|
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, the Demand D5C features a 1" aluminum dome Tweeter and 2 x 5.25" BDSS Woofer .
Frequency Response
Q650c has a frequency range of 64-28k Hz whereas Demand D5C has a frequency range of 42-22k Hz. With a minimum frequency of 42Hz, the Demand D5C can go significantly deeper on the low side and provide stronger bass compared to the Q650c's min frequency of 64Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the 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 pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Q650c and Demand D5C have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Q650c sensitivity is rated at 87 dB and the Demand D5C's is at 85.5 dB. This 1 dB difference makes the KEF Q650c a more sensitive speaker compared to Definitive D5C, hence will play louder with the same amount of watts.
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 200 watts RMS from the amp the whereas Q650c has a max power handling value of 150 watts RMS , 50 watts less than the Demand D5C.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
Q650c features 5-Way post type posts and Demand D5C has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
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 Definitive D5C'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 Definitive D5C has external dimensions of 169.0 x 485.0 x 289.0mm ( 6-5/8 x 19-1/16 x 11-3/8inch) .
KEF Q650c is clearly the larger of the two speakers. Its body is 146mm wider, 43mm taller and 15mm deeper than Definitive D5C.
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 Definitive D5C is approximately 1401.7cm2 / 217.3inch2. The Q650c requires 37% more surface area than the Demand D5C which gives it a small disadvantage on placement in tight spaces.
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The KEF Q650c weighs 13.64kg / 30lbs and the Definitive D5C weighs 10.91kg / 24lbs. This makes the Q650c 25% heavier than the Demand D5C.
Here is a comparison of how Q650c and Demand D5C's weights compare with the average, max and min weights in Passive Center Channel class.
Weight
All Center Channel Speakers
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 Definitive D5C?
Here are the items that come with the Demand D5C:
Center-channel loudspeakerGrilleCleaning clothOwners Manual
Sensitivity |
87 dB
vs
86 dB
|
Play louder with same amount of amplification power |
Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
High Frequency Response |
28k Hz
vs
22k Hz
|
Generates higher frequency |
Passive Radiator |
one 6.5-inch
vs
None
|
Increases the bass performance |
Price per pair* |
750USD
vs
799USD
|
costs less (*prices may change depending on the seller, location and time) |
Max Input Power |
200 watts
vs
150 watts
|
Handle more power from your amplifier |
Low Frequency Response |
42 Hz
vs
64 Hz
|
Generates deeper bass |
Height |
169mm
vs
212mm
|
Easier to fit in smaller spaces |
Base Surface Area |
1401cm2 (485x289mm)
vs
1918cm2 (631x304mm)
|
Takes less floor space |
General |
KEF Q650c |
Definitive Technology Demand D5C |
Brand |
KEF |
Definitive Technology |
Speaker Type |
Center channel speaker |
Center channel speaker |
Power Range |
15-150 watts |
30-200 watts |
Sensitivity |
87 dB |
85.5 dB |
Impedance |
8 ohms |
8 ohms |
Impedance |
4.2 ohms |
n/a |
Frequency Response |
64-28k Hz |
42-22k Hz |
Drivers |
|
|
Woofer Quantity |
2 |
2 |
Woofer Size |
6.5" |
5.25" |
Woofer Composition |
aluminum |
BDSS |
Woofer Surround Material |
Rubber |
n/a |
Tweeter Size |
1" |
1" |
Tweeter Type |
Dome |
dome |
Aimable Tweeter |
No |
No |
Midrange Driver |
No |
No |
Crossover Frequency |
2500Hz |
n/a |
Physical Specs |
|
|
Height |
212.0mm (8.3") |
169.0mm (6.7") |
Width |
631.0mm (24.8") |
485.0mm (19.1") |
Depth |
304.0mm (12") |
289.0mm (11.4") |
Weight |
13.64kg (30lbs) |
10.91kg (24lbs) |
Enclosure |
Passive Radiator |
Acoustic Suspension |
Available Colors |
Satin White, Satin Black, Walnut |
Gloss White |
Grille |
optional |
Yes |
Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
Parts Warranty |
5 Years |
5 Years |
Labor Warranty |
5 Years |
5 Years |