In this review, we will be comparing Q Acoustics 5090 and RP-504C II, two Passive Center Channel speakers from Q Acoustics and Klipsch. Let's have a brief look at the main features
of Q Acoustics 5090 and Klipsch RP-504C II first before getting into our more
detailed comparison.
What size room are the Q Acoustics 5090 and Klipsch RP-504C 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 Q Acoustics 5090 and Klipsch RP-504C 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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through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both Q Acoustics 5090 and RP-504C II are 2-way speakers.
| Driver |
Q Acoustics 5090 |
Klipsch RP-504C II |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 4.5-inch
|
4 x 5.25-inch
|
Q Acoustics 5090 features a 1" Soft-dome Tweeter and 2 x 4.5" Continuous Curved Cone Woofer with a Crossover frequency at 2100 Hz. On the other hand, the 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.
Frequency Response
Q Acoustics 5090 has a frequency range of 57-30k Hz whereas RP-504C II has a frequency range of 50-25k 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 Q Acoustics 5090's min frequency of 57Hz.
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
Q Acoustics 5090 is a 6 ohms speaker compared to the RP-504C II which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. Q Acoustics 5090 sensitivity is rated at 90.5 dB and the RP-504C II's is rated at 96 dB. This 5 dB difference makes the Klipsch RP-504C II a more sensitive speaker compared to Q Acoustics 5090, 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
Q Acoustics 5090 features Binding post type posts and RP-504C II has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
Q Acoustics 5090's Binding post terminals
Klipsch RP-504C II's Binding post terminals
Cabinet Type and Port Position
Both Q Acoustics 5090 and RP-504C 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 Q Acoustics 5090's and Klipsch RP-504C II's external dimensions. Q Acoustics 5090 has external dimensions of 166.0 x 431.0 x 245.0mm ( 6-1/2inch x 16-15/16inch x 9-5/8inch ) whereas 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) .
Klipsch RP-504C II is clearly the larger of the two speakers. Its body is 387mm wider, 11mm taller and 140mm deeper than Q Acoustics 5090.
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 Q Acoustics 5090 is approximately 1056.0cm2 / 163.7inch2 and base area of the Klipsch RP-504C II is approximately 3149.3cm2 / 488.1inch2. The Q Acoustics 5090 requires 66% less surface area than the RP-504C II 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 Q Acoustics 5090 weighs 8.50kg / 18.7lbs and the Klipsch RP-504C II weighs 16.50kg / 36.3lbs. This makes the RP-504C II 94% heavier than the Q Acoustics 5090.
Here is a comparison of how Q Acoustics 5090 and RP-504C 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 Q Acoustics 5090?
Here are the items that are included inside the box of Q Acoustics 5090:
1x 5090 loudspeaker 1x Owners manual 2x Foam bung
What's in the Box of Klipsch RP-504C II?
Here are the items that come with the RP-504C II:
Center channel loudspeakerGrilleUser ManualImportant Safety InstructionsWarranty Information
 High Frequency Response |
30k Hz
vs
25k Hz
|
Generates higher frequency |
 Height |
166mm
vs
177mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1056cm2 (431x245mm)
vs
3149cm2 (818x385mm)
|
Takes less floor space |
 Price per pair* |
599USD
vs
799USD
|
costs less (*prices may change depending on the seller, location and time) |
 Sensitivity |
96 dB
vs
91 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
4.5 inches
|
Larger woofer |
| Number of Woofers |
4
vs
2
|
More woofers |
| Low Frequency Response |
50 Hz
vs
57 Hz
|
Generates deeper bass |
| General |
Q Acoustics 5090 |
Klipsch Reference Premiere RP-504C II |
| Brand |
Q Acoustics |
Klipsch |
| Speaker Type |
Center channel speaker |
Center channel speaker |
| Power Range |
25-150 watts |
up to 150 watts |
| Sensitivity |
90.5 dB |
96 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
3.2 ohms |
n/a |
| Frequency Response |
57-30k Hz |
50-25k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
4 |
| Woofer Size |
4.5" |
5.25" |
| Woofer Composition |
Continuous Curved Cone |
Cerametallic cone |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-dome |
Tractrix Horn |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2100 Hz |
1950 Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
166.0mm (6.5") |
177.0mm (7") |
| Width |
431.0mm (17") |
818.0mm (32.2") |
| Depth |
245.0mm (9.6") |
385.0mm (15.2") |
| Weight |
8.50kg (18.7lbs) |
16.50kg (36.3lbs) |
| Enclosure |
Bass Relfex |
Bass Reflex |
| Finish |
MDF |
MDF/Wood-grain vinyl |
| Available Colors |
Holme Oak,Satin Black,Satin White,Santos Rosewood |
Walnut, Black |
| 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 |