In this review, we will be comparing Q650c and RP-504C, two Passive Center Channel speakers from KEF and Klipsch.
Let's have a brief look at the main features
of KEF Q650c and Klipsch RP-504C first before getting into our more
detailed comparison.
KEF Q650c Key Specs
- 2-way Design
- 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 )
Klipsch RP-504C Key Specs
- 2-way Design
- 1" Tractrix horn Tweeter
- 4 x 5.25" Cerametallic cone Woofer
- 58-25k Hz Frequency Response
- 97 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 150watts
- Weight:15.45kg
- Dimensions (H x W x D): 175.0" x 31-3/16" x 14-7/16"( 175.0 x 793.0 x 367.0mm )
What size room are the KEF Q650c and Klipsch RP-504C 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:
| Listening Environment* |
KEF Q650c |
Klipsch RP-504C |
| Near-field |
Poor |
Poor |
| Small Room |
Average |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Average |
Average |
| Very Large Room |
Poor |
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.)
In the following sections, we will get into more detail in order to better understand how the KEF Q650c and Klipsch RP-504C compare 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 RP-504C are 2-way speakers.
| Driver |
KEF Q650c |
Klipsch RP-504C |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 6.5-inch
|
4 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 RP-504C features a 1" titanium Tractrix horn Tweeter and 4 x 5.25" Cerametallic cone Woofer .
Frequency Response
Q650c has a frequency range of 64-28k Hz whereas RP-504C has a frequency range of 58-25k Hz. With a minimum frequency of 58Hz, the RP-504C 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 RP-504C have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Q650c sensitivity is rated at 87 dB and the RP-504C's is at 97 dB. This 10 dB difference makes the Klipsch RP-504C a more sensitive speaker compared to KEF Q650c, 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.
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 Binding post type posts and RP-504C has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
KEF Q650c's Binding post terminals
Klipsch RP-504C'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 Q650c's and Klipsch RP-504C'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 Klipsch RP-504C has external dimensions of 175.0 x 793.0 x 367.0mm ( 6-7/8 x 31-3/16 x 14-7/16inch) .
KEF Q650c is 162mm narrower and 63mm less deeper than Klipsch RP-504C but it is also 37mm taller.
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 Klipsch RP-504C is approximately 2910.3cm2 / 451.1inch2. The Q650c requires 34% less surface area than the RP-504C which gives it a small advantage on placement in tight spaces.