In this review, we will be comparing two different type of speakers by Sonus Faber. Sonus Faber Lumina III is a Floor-standing speaker whereas the Lumina I is a Bookshelf speaker.
Let's have a brief look at the main features
of Sonus Lumina III and Sonus Lumina I first before getting into our more
detailed comparison.
Sonus Lumina III Key Specs
- 3-way Design
- 1.15" high definition DAD Tweeter
- 6" Midrange
- 2 x 6" paper cone Woofer
- 40-24k Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 4ohms
- Power Range:50-250watts
- Weight:15.90kg
- Dimensions (H x W x D): 989.0" x 9" x 10.9"( 989.0 x 228.0 x 278.0mm )
Sonus Lumina I Key Specs
- 2-way Design
- 1.15" high definition DAD Tweeter
- 4.75" paper cone Woofer
- 65-24k Hz Frequency Response
- 88 dB Sensitivity
- Impedance: 4ohms
- Power Range:30-100watts
- Weight:4.40kg
- Dimensions (H x W x D): 280.0" x 5.8" x 8.4"( 280.0 x 148.0 x 213.0mm )
Lumina III and Lumina I are members of Sonus Faber's Lumina series of speakers. Below you can find the loudspeakers from this series.
Sonus Faber Lumina Series History
What size room are the Sonus Lumina III and Sonus Lumina I 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 III |
Sonus Lumina I |
| Near-field |
Bad |
Average |
| Small Room |
Poor |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Good |
Poor |
| Very Large Room |
Average |
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 Sonus Lumina III and Sonus Lumina I 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
One of the fundamental differences between these two speakers is that Lumina III is a 3-way design whereas the Lumina I is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
Sonus Lumina III |
Sonus Lumina I |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1.15-inch
|
1.15-inch
|
|
Midrange
|
1 x 6-inch |
- |
|
Woofer
|
2 x 6-inch
|
1 x 4.75-inch
|
Lumina III features a 1.15" high definition DAD Tweeter , a 6" Midrange and 2 x 6" paper cone Woofer with a Crossover frequency at 350 and 3500 Hz. On the other hand, the Lumina I features a 1.15" high definition DAD Tweeter and 1 x 4.75" paper cone Woofer with a Crossover frequency at 2000Hz.
Frequency Response
Lumina III has a frequency range of 40-24k Hz whereas Lumina I has a frequency range of 65-24k Hz. With a minimum frequency of 40Hz, the Lumina III can go significantly deeper on the low side and provide stronger bass compared to the Lumina I'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 Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
High Frequency
Floor-standing 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 III and Lumina I have the same Impedance of 4 ohms but where they differ is the sensitivity levels. Lumina III sensitivity is rated at 89 dB and the Lumina I's is at 88 dB. This 5 dB difference makes the Sonus Lumina III a more sensitive speaker compared to Sonus Lumina I, hence will play louder with the same amount of watts.
One thing to keep in mind that the lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit comared to higher impedance speakers especially at high volume levels, so make sure the amp you pair with the Lumina III and the Lumina III can provide this impedance level.
Sensitivity
Floor-standing 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 III can handle a max power of 250 watts RMS from the amp the whereas Lumina I has a max power handling value of 100 watts RMS, 150 watts less than the Lumina III.
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
Both Lumina III and Lumina I features dual binding post speaker terminals for bi-amping or bi-wiring.
Sonus Lumina I's Binding post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Lumina III has a bottom firing port whereas Lumina I has a front firing ports. Sonus Lumina I's front-firing port gives more flexibility in placement in regards to proximity to walls compared to Sonus Lumina III with its rear-firing 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 III's and Sonus Lumina I's external dimensions. Sonus Lumina III has external dimensions of 989.0 x 228.0 x 278.0mm ( 38.9 x 9 x 10.9inch) whereas Sonus Lumina I has external dimensions of 280.0 x 148.0 x 213.0mm ( 11 x 5.8 x 8.4inch) .
Sonus Lumina III is clearly the larger of the two speakers. Its body is 80mm wider, 709mm taller and 65mm deeper than Sonus Lumina I.
Below you can see the front view size comparison of Sonus Lumina III and Sonus Lumina I in scale.
Comparison image of Sonus Lumina III and Sonus Lumina I Size and External Dimensions
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 III is approximately 633.8cm2 / 98.2inch2 and base area of the Sonus Lumina I is approximately 315.2cm2 / 48.9inch2. The Lumina III requires 101% more surface area than the Lumina I which gives it a small disadvantage on placement in tight spaces.
What's in the Box of Sonus Lumina III?
Here are the items that are included inside the box of Lumina III:
Floorstanding loudspeaker1 Manual 2 Jumpers2 Grilles 2 Fabric dust guards4 Spikes 4 Under spikes 4 Spikes locks
What's in the Box of Sonus Lumina I?
Here are the items that come with the Lumina I:
2 Bookshelf loudspeakers1 Manual 2 Jumpers2 Grilles 2 Fabric dust guards
Max Input Power 
Driver Setup 
Sensitivity 
Woofer Size 
Height 
Base Surface Area 
Price per pair*