In this review, we will be comparing Lumina CI and R400, two Passive Center Channel speakers from Sonus Faber and Polk Audio.
Let's have a brief look at the main features
of Sonus Lumina Center I and Polk R400 first before getting into our more
detailed comparison.
Sonus Lumina Center I Key Specs
- 2-way Design
- 1.15" high definition DAD Tweeter
- 2 x 4.75" paper cone Woofer
- 65-24k Hz Frequency Response
- 87 dB Sensitivity
- Impedance: 4ohms
- Power Range:30-100watts
- Weight:7.60kg
- Dimensions (H x W x D): 169.0" x 20.6" x 8.4"( 169.0 x 524.0 x 213.0mm )
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 Sonus Lumina Center I 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* |
Sonus Lumina Center I |
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 Sonus Lumina Center I and Polk R400 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 Lumina CI and R400 are 2-way speakers.
| Driver |
Sonus Lumina Center I |
Polk R400 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1.15-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 4.75-inch
|
2 x 6.5-inch
|
Lumina CI features a 1.15" high definition DAD Tweeter and 2 x 4.75" paper cone Woofer with a Crossover frequency at 2000 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
Lumina CI has a frequency range of 65-24k 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 Lumina CI'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
Lumina CI is a 4 ohms speaker compared to the R400 which has a nominal impedance of 8 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the Lumina CI can provide this impedance level.
These two speakers also have different sensitivity levels. Lumina CI sensitivity is rated at 87 dB and the R400's is rated at 89 dB. This 2 dB difference makes the Polk R400 a more sensitive speaker compared to Sonus Lumina Center I, 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.
Lumina CI can handle a max power of 200 watts RMS from the amp the whereas Lumina CI 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
Lumina CI features Binding post posts which make bi-amping or bi-wiring possible. R400 has a Binding post which doesn't feature bi-amping/bi-wiring.
Sonus Lumina Center I's Binding post terminals allows Bi-amping or bi-wiring
Polk R400's Binding post terminals
Cabinet Type and Port Position
Lumina CI has a front firing port whereas R400 has a rear firing ports. Sonus Lumina Center I's front-firing port gives more flexibility in placement in regards to proximity to walls compared to Polk R400 with its rear-firing port.
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 Sonus Lumina Center I's and Polk R400's external dimensions. Sonus Lumina Center I has external dimensions of 169.0 x 524.0 x 213.0mm ( 6.6 x 20.6 x 8.4inch) 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 94mm wider, 30mm taller and 159mm deeper than Sonus Lumina Center I.
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 Sonus Lumina Center I is approximately 1116.1cm2 / 173.0inch2 and base area of the Polk R400 is approximately 2299.0cm2 / 356.3inch2. The Lumina CI requires 51% less surface area than the R400 which gives it a small advantage on placement in tight spaces.