In this review, we will be comparing Lumina I and R-41M, two Passive Bookshelf speakers from Sonus Faber and Klipsch. Let's have a brief look at the main features of Sonus Lumina I and Klipsch R-41M first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how Sonus Lumina I and Klipsch R-41M compares and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Both Lumina I and R-41M are 2-way speakers. Lumina I features a 1.15" high definition DAD Tweeter and 1 x 4.75" paper cone Woofer with a Crossover frequency at 2000Hz. On the other hand, R-41M features a 1" Tractrix Horn Tweeter and 1 x 4" Copper-spun IMG Woofer with a Crossover frequency at 1730Hz.
Lumina I has a frequency range of 65-24k Hz whereas R-41M has a frequency range of 68-21k Hz. With a minimum frequency of 68Hz, the R-41M can go slightly deeper then 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 under Bookshelf class in our database.
Impedance and Sensitivity
Lumina I is a 4 ohms speaker compared to R-41M which has a nominal impedance of 8 ohms. These two speakers also have different sensitivity levels. Lumina I sensitivity is rated at 88 dB and R-41M's is at 90 dB. This 6 dB difference makes Klipsch R-41M a more sensitive speaker compared to Sonus Lumina I, hence will play louder with the same amount of watts.
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 I can handle a max power of 100 watts RMS from the amp the whereas R-41M has a max power handling value of 50 watts RMS, 50 watts less than the Lumina I.
Keep in mind that higher max power handling value doesn't necesssarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impededance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
Lumina I features Binding post posts which makes bi-amping or bi-wiring possible. R-41M has a Single Gold Plated Binding Posts which doesn't feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Lumina I has a front firing port whereas R-41M has a rear firing ports. Sonus Lumina I's front-firing port gives more flexibility in placement in regards to proximity to walls compared to Klipsch R-41M with its rear-firing port.
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 I's and Klipsch R-41M's external dimensions. Sonus Lumina I has external dimensions of 280.0 x 148.0 x 213.0mm ( 11 x 5.8 x 8.4inch) whereas Klipsch R-41M has external dimensions of 287.0 x 146.0 x 200.0mm ( 11.2 x 5.7 x 7.8inch) .
Klipsch R-41M is 2mm narrower and 13mm less deeper than Sonus Lumina I but it is also 7mm taller.
Below you can see the front view size comparison of Sonus Lumina I and Klipsch R-41M in scale.
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 I is approximately 315.2cm2 / 48.9inch2 and base area of the Klipsch R-41M is approximately 292.0cm2 / 45.3inch2. The Lumina I requires 8% more surface area than the R-41M which gives it a small disadvantage on placement in tight spaces.
Here is an another comparison that shows both speakers on a BDI Octave Media Cabinet, next to a standard size amplifier and turntable in scale: