In this review, we will be comparing two different type of speakers by Klipsch. Klipsch Reference Premiere RP-400C is a Center Channel speaker whereas the RP-600M is a Bookshelf speaker.
Let's have a brief look at the main features
of Klipsch RP-400C and Klipsch RP-600M first before getting into our more
detailed comparison.
Klipsch RP-400C Key Specs
- 2-way Design
- 1" Tractrix horn Tweeter
- 2 x 4" Cerametallic cone Woofer
- 65-25k Hz Frequency Response
- 95 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 75watts
- Weight:6.36kg
- Dimensions (H x W x D): 147.0" x 16-1/16" x 9-1/2"( 147.0 x 408.0 x 242.0mm )
Klipsch RP-600M Key Specs
- 2-way Design
- 1" Tractrix Horn Tweeter
- 6.5" Cerametallic Woofer
- 45-25k Hz Frequency Response
- 96 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 100watts
- Weight:7.30kg
- Dimensions (H x W x D): 399.0" x 7.9" x 11.8"( 399.0 x 202.0 x 301.0mm )
RP-400C and RP-600M are members of Klipsch's Reference Premiere (RP) series of speakers. Below you can find the loudspeakers from this series.
Klipsch Reference Premiere (RP) Series History
What size room are the Klipsch RP-400C and Klipsch RP-600M 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-400C |
Klipsch RP-600M |
| Near-field |
Good |
Average |
| Small Room |
Good |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Poor |
| Very Large Room |
No way |
Bad |
(* 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-400C and Klipsch RP-600M 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 RP-400C and RP-600M are 2-way speakers.
| Driver |
Klipsch RP-400C |
Klipsch RP-600M |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 4-inch
|
1 x 6.5-inch
|
RP-400C features a 1" titanium Tractrix horn Tweeter and 2 x 4" Cerametallic cone Woofer . On the other hand, the RP-600M features a 1" Tractrix Horn Tweeter and 1 x 6.5" Cerametallic Woofer with a Crossover frequency at 1500Hz.
Frequency Response
RP-400C has a frequency range of 65-25k Hz whereas RP-600M has a frequency range of 45-25k Hz. With a minimum frequency of 45Hz, the RP-600M can go significantly deeper on the low side and provide stronger bass compared to the RP-400C's min frequency of 65Hz.
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-400C and RP-600M have the same Impedance of 8 ohms but where they differ is the sensitivity levels. RP-400C sensitivity is rated at 95 dB and the RP-600M's is at 96 dB. This 1 dB difference makes the Klipsch RP-600M a more sensitive speaker compared to Klipsch RP-400C, 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-400C can handle a max power of 100 watts RMS from the amp the whereas RP-400C has a max power handling value of 75 watts RMS , 25 watts less than the RP-600M.
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-600M features Dual binding posts/bi-wire/bi-amp posts which make bi-amping or bi-wiring possible. RP-400C has a Binding post which doesn't feature bi-amping/bi-wiring.
Klipsch RP-400C's Binding post terminals
Klipsch RP-600M's Dual binding posts/bi-wire/bi-amp terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both RP-400C and RP-600M 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.
Klipsch RP-600M Tractrix horn-shaped 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-400C's and Klipsch RP-600M's external dimensions. Klipsch RP-400C has external dimensions of 147.0 x 408.0 x 242.0mm ( 5-3/4 x 16-1/16 x 9-1/2inch) whereas Klipsch RP-600M has external dimensions of 399.0 x 202.0 x 301.0mm ( 15.7 x 7.9 x 11.8inch) .
Klipsch RP-400C is 252mm shorter and 59mm less deeper than Klipsch RP-600M but it is also 206mm wider.
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-400C is approximately 987.4cm2 / 153.0inch2 and base area of the Klipsch RP-600M is approximately 608.0cm2 / 94.2inch2. The RP-400C requires 62% more surface area than the RP-600M which gives it a small disadvantage on placement in tight spaces.
What's in the Box of Klipsch RP-400C?
Here are the items that are included inside the box of RP-400C:
Center channel loudspeakerGrille (installed)4 Self-adhesive rubber feetTilt rod (attached nut)User ManualImportant Safety InstructionsWarranty Information
What's in the Box of Klipsch RP-600M?
Here are the items that come with the RP-600M:
2 Bookshelf loudspeakers2 Grilles (installed)8 Self-adhesive rubber feet4 Terminal jumpers (installed)User ManualImportant Safety InstructionsWarranty Information
Number of Woofers 
Height 
Price per pair* 
Max Input Power 
Sensitivity 
Base Surface Area