In this review, we will be comparing RP-504C II and C 9 CEN II, two Passive Center Channel speakers from Klipsch and Jamo. Let's have a brief look at the main features
of Klipsch RP-504C II and Jamo C 9 CEN II first before getting into our more
detailed comparison.
What size room are the Klipsch RP-504C II and Jamo C 9 CEN II 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 Klipsch RP-504C II and Jamo C 9 CEN II 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-504C II and C 9 CEN II are 2-way speakers.
| Driver |
Klipsch RP-504C II |
Jamo C 9 CEN II |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
4 x 5.25-inch
|
2 x 4-inch
|
RP-504C II features a 1" titanium Tractrix Horn Tweeter and 4 x 5.25" Cerametallic cone Woofer with a Crossover frequency at 1950 Hz. On the other hand, the C 9 CEN II features a 1" soft dome with an integrated waveguide Tweeter and 2 x 4" HCCC (Hybrid Composition Conical Cone) Woofer .
Frequency Response
RP-504C II has a frequency range of 50-25k Hz whereas C 9 CEN II has a frequency range of 55-24k Hz. With a minimum frequency of 50Hz, the RP-504C II can go significantly deeper on the low side and provide stronger bass compared to the C 9 CEN II's min frequency of 55Hz.
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-504C II is a 8 ohms speaker compared to the C 9 CEN II which has a nominal impedance of 6 ohms.
These two speakers also have different sensitivity levels. RP-504C II sensitivity is rated at 96 dB and the C 9 CEN II's is rated at 88 dB. This 8 dB difference makes the Klipsch RP-504C II a more sensitive speaker compared to Jamo C 9 CEN II, 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-504C II can handle a max power of 150 watts RMS from the amp the whereas C 9 CEN II has a max power handling value of 140 watts RMS, 10 watts less than the RP-504C II.
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-504C II features 5-Way post type posts and C 9 CEN II has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
Klipsch RP-504C II's Binding post terminals
Jamo C 9 CEN II's 5-Way post terminals
Cabinet Type and Port Position
Both RP-504C II and C 9 CEN II 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.
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-504C II's and Jamo C 9 CEN II's external dimensions. Klipsch RP-504C II has external dimensions of 177.0 x 818.0 x 385.0mm ( 6-15/16 x 32-3/16 x 15-1/8inch) whereas Jamo C 9 CEN II has external dimensions of 183.0 x 466.0 x 231.0mm ( 7-3/16 x 18-5/16 x 9-1/16inch) .
Jamo C 9 CEN II is 352mm narrower and 154mm less deeper than Klipsch RP-504C II but it is also 6mm 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 Klipsch RP-504C II is approximately 3149.3cm2 / 488.1inch2 and base area of the Jamo C 9 CEN II is approximately 1076.5cm2 / 166.9inch2. The RP-504C II requires 193% more surface area than the C 9 CEN II 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 Klipsch RP-504C II weighs 16.50kg / 36.3lbs and the Jamo C 9 CEN II weighs 3.09kg / 6.8lbs. This makes the RP-504C II 434% heavier than the C 9 CEN II.
Here is a comparison of how RP-504C II and C 9 CEN II'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-504C II?
Here are the items that are included inside the box of RP-504C II:
Center channel loudspeakerGrilleUser ManualImportant Safety InstructionsWarranty Information
What's in the Box of Jamo C 9 CEN II?
Here are the items that come with the C 9 CEN II:
Center-channel loudspeakerGrille4 Rubber feet (pre-installed)2 Self-adhesive rubber bumpersUser ManualImportant Safety InstructionsWarranty Information
 Max Input Power |
150 watts
vs
140 watts
|
Handle more power from your amplifier |
 Sensitivity |
96 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Woofer Size |
5.25 inches
vs
4 inches
|
Larger woofer |
| Number of Woofers |
4
vs
2
|
More woofers |
| Low Frequency Response |
50 Hz
vs
55 Hz
|
Generates deeper bass |
 High Frequency Response |
25k Hz
vs
24k Hz
|
Generates higher frequency |
 Height |
177mm
vs
183mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1076cm2 (466x231mm)
vs
3149cm2 (818x385mm)
|
Takes less floor space |
 Price per pair* |
344USD
vs
799USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Klipsch Reference Premiere RP-504C II |
Jamo Concert 9 Series C 9 CEN II |
| Brand |
Klipsch |
Jamo |
| Speaker Type |
Center channel speaker |
Center channel speaker (Black Ash) |
| Power Range |
up to 150 watts |
50-140 watts |
| Sensitivity |
96 dB |
88 dB |
| Impedance |
8 ohms |
6 ohms |
| Frequency Response |
50-25k Hz |
55-24k Hz |
Drivers |
|
|
| Woofer Quantity |
4 |
2 |
| Woofer Size |
5.25" |
4" |
| Woofer Composition |
Cerametallic cone |
HCCC (Hybrid Composition Conical Cone) |
| Woofer Surround Material |
Rubber |
n/a |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Tractrix Horn |
soft dome with an integrated waveguide |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
N/A" |
| Crossover Frequency |
1950 Hz |
n/a |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
177.0mm (7") |
183.0mm (7.2") |
| Width |
818.0mm (32.2") |
466.0mm (18.3") |
| Depth |
385.0mm (15.2") |
231.0mm (9.1") |
| Weight |
16.50kg (36.3lbs) |
3.09kg (6.8lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
n/a |
| Available Colors |
Walnut, Black |
Black Ash, White Oak,Dark Apple |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
n/a |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |