In this review, we will be comparing RP-500C II and R400, two Passive Center Channel speakers from Klipsch and Polk Audio.
Let's have a brief look at the main features
of Klipsch RP-500C II and Polk R400 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 )
Polk R400 Key Specs
- 2-way Design
- 1" Pinnacle Ring Radiator Tweeter
- 2 x 6.5" Polypropylene Turbine Cone Woofer
- 48-39K Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 8ohms
- Power Range:20-200watts
- Weight:14.91kg
- Dimensions (H x W x D): 199.0" x 24-5/16" x 14-5/8"( 199.0 x 618.0 x 372.0mm )
What size room are the Klipsch RP-500C II and Polk R400 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 |
Polk R400 |
| 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 Polk R400 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 R400 are 2-way speakers.
| Driver |
Klipsch RP-500C II |
Polk R400 |
|
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 R400 features a 1" Pinnacle Ring Radiator Tweeter and 2 x 6.5" Polypropylene Turbine Cone Woofer with a Crossover frequency at 2500Hz.
Frequency Response
RP-500C II has a frequency range of 60-25k Hz whereas R400 has a frequency range of 48-39K Hz. With a minimum frequency of 48Hz, the R400 can go significantly deeper on the low side and provide stronger bass compared to the RP-500C II's min frequency of 60Hz.
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 R400 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 R400's is at 89 dB. This 7 dB difference makes the Klipsch RP-500C II a more sensitive speaker compared to Polk R400, 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 200 watts RMS from the amp the whereas RP-500C II has a max power handling value of 100 watts RMS , 100 watts less than the R400.
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 R400 has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
Polk R400's Binding post terminals
Cabinet Type and Port Position
Both RP-500C II and R400 have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
Polk R400 dual Port
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 Polk R400'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 Polk R400 has external dimensions of 199.0 x 618.0 x 372.0mm ( 7-13/16 x 24-5/16 x 14-5/8inch) .
Polk R400 is clearly the larger of the two speakers. Its body is 124mm wider, 22mm taller and 103mm deeper than Klipsch RP-500C II.
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 Polk R400 is approximately 2299.0cm2 / 356.3inch2. The RP-500C II requires 42% less surface area than the R400 which gives it a small advantage 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 Klipsch RP-500C II weighs 8.20kg / 18lbs and the Polk R400 weighs 14.91kg / 32.8lbs. This makes the R400 82% heavier than the RP-500C II.
Here is a comparison of how RP-500C II and R400'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 Klipsch RP-500C II?
Here are the items that are included inside the box of RP-500C II:
Center channel loudspeakerGrilleTilt rod (attached nut)User ManualImportant Safety InstructionsWarranty Information
What's in the Box of Polk R400?
Here are the items that come with the R400:
Center-channel loudspeakerGrilleOwners ManualOnline Registration
 Sensitivity |
96 dB
vs
89 dB
|
Play louder with same amount of amplification power |
 Height |
177mm
vs
199mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1328cm2
vs
2299cm2
|
Takes less floor space |
 Price per pair* |
499USD
vs
649USD
|
costs less (*prices may change depending on the seller, location and time) |
 Max Input Power |
200 watts
vs
100 watts
|
Handle more power from your amplifier |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
|
Low Frequency Response |
48 Hz
vs
60 Hz
|
Generates deeper bass |
 High Frequency Response |
39k Hz
vs
25k Hz
|
Generates higher frequency |
| General |
Klipsch Reference Premiere RP-500C II |
Polk Audio Reserve R400 |
| Brand |
Klipsch |
Polk Audio |
| Speaker Type |
Center channel speaker |
Center channel speaker |
| Power Range |
up to 100 watts |
20-200 watts |
| Sensitivity |
96 dB |
89 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
4.1 ohms |
| Frequency Response |
60-25k Hz |
48-39K Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
5.25" |
6.5" |
| Woofer Composition |
Cerametallic cone |
Polypropylene Turbine Cone |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Tractrix Horn |
Pinnacle Ring Radiator |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
N/A" |
| Crossover Frequency |
1630 Hz |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
177.0mm (7") |
199.0mm (7.8") |
| Width |
494.0mm (19.4") |
618.0mm (24.3") |
| Depth |
269.0mm (10.6") |
372.0mm (14.6") |
| Weight |
8.20kg (18lbs) |
14.91kg (32.8lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
n/a |
| Available Colors |
Walnut, Black |
Black, Walnut |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |