In this review, we will be comparing RP-500C II and Q650c, two Passive Center Channel speakers from Klipsch and KEF.
Let's have a brief look at the main features
of Klipsch RP-500C II and KEF Q650c first before getting into our more
detailed comparison.
Klipsch RP-500C II Key Specs
- 2-way Design
- 1" Tractrix Horn Tweeter
- 2 x 5.25" Cerametallic cone Woofer
- 60-25k Hz Frequency Response
- 96 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 100watts
- Weight:8.20kg
- Dimensions (H x W x D): 177.0" x 19-7/16" x 10-9/16"( 177.0 x 494.0 x 269.0mm )
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 )
What size room are the Klipsch RP-500C II and KEF Q650c 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* |
Klipsch RP-500C II |
KEF Q650c |
| Near-field |
Average |
Poor |
| Small Room |
Good |
Average |
| Mid-size Room |
Average |
Good |
| Large Room |
Poor |
Average |
| Very Large Room |
Bad |
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 Klipsch RP-500C II and KEF Q650c 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 RP-500C II and Q650c are 2-way speakers.
| Driver |
Klipsch RP-500C II |
KEF Q650c |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 5.25-inch
|
2 x 6.5-inch
|
RP-500C II features a 1" titanium Tractrix Horn Tweeter and 2 x 5.25" Cerametallic cone Woofer with a Crossover frequency at 1630 Hz. On the other hand, the Q650c features a 1" vented aluminum Dome Tweeter and 2 x 6.5" aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
RP-500C II has a frequency range of 60-25k Hz whereas Q650c has a frequency range of 64-28k Hz. With a minimum frequency of 60Hz, the RP-500C II can go slightly deeper then 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
RP-500C II and Q650c have the same Impedance of 8 ohms but where they differ is the sensitivity levels. RP-500C II sensitivity is rated at 96 dB and the Q650c's is at 87 dB. This 9 dB difference makes the Klipsch RP-500C II 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.
RP-500C II can handle a max power of 150 watts RMS from the amp the whereas RP-500C II has a max power handling value of 100 watts RMS , 50 watts less than the Q650c.
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
RP-500C II features Binding post type posts and Q650c has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
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 Klipsch RP-500C II's and KEF Q650c's external dimensions. Klipsch RP-500C II has external dimensions of 177.0 x 494.0 x 269.0mm ( 6-15/16 x 19-7/16 x 10-9/16inch) 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 clearly the larger of the two speakers. Its body is 137mm wider, 35mm taller and 35mm deeper than Klipsch RP-500C II.
Below you can see the front view size comparison of Klipsch RP-500C II and KEF Q650c in scale.
Comparison image of Klipsch RP-500C II and KEF Q650c 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 Klipsch RP-500C II is approximately 1328.9cm2 / 206.0inch2 and base area of the KEF Q650c is approximately 1918.2cm2 / 297.3inch2. The RP-500C II requires 31% less surface area than the Q650c which gives it a small advantage on placement in tight spaces.