In this review, we will be comparing R820F and R625FA, two Passive Floorstanding speakers by Klipsch Let's have a brief look at the main features
of Klipsch R820F and Klipsch R625FA first before getting into our more
detailed comparison.
R820F and R625FA are members of Klipsch's Reference (R) Floorstanding series of speakers. Below you can find the loudspeakers from this series.
Klipsch Reference (R) Floorstanding Series History
What size room are the Klipsch R820F and Klipsch R625FA 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 R820F and Klipsch R625FA 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 R820F and R625FA are 2way speakers.
Driver 
Klipsch R820F 
Klipsch R625FA 
Driver Setup

2way

2way

Tweeter

1inch

1inch

Midrange

 
 
Woofer

2 x 8inch

2 x 6.5inch

R820F features a 1" Tweeter and 2 x 8" Copperspun IMG Woofer . On the other hand, the R625FA features a 1" Tweeter and 2 x 6.5" Copperspun IMG Woofer with a Crossover frequency at 2000Hz.
Frequency Response
R820F has a frequency range of 3521k Hz whereas R625FA has a frequency range of 3821k Hz. With a minimum frequency of 35Hz, the R820F can go slightly deeper then the R625FA's min frequency of 38Hz.
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 Floorstanding class in our database.
Low Frequency
Floorstanding Speakers
High Frequency
Floorstanding Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz20kHz. 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
R820F and R625FA have the same Impedance of 8 ohms but where they differ is the sensitivity levels. R820F sensitivity is rated at 97 dB and the R625FA's is at 96 dB. This 1 dB difference makes the Klipsch R820F a more sensitive speaker compared to Klipsch R625FA, hence will play louder with the same amount of watts.
Sensitivity
Floorstanding 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.
R820F can handle a max power of 150 watts RMS from the amp the whereas R625FA has a max power handling value of 100 watts RMS, 50 watts less than the R820F.
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 BiAmping / BiWiring
R820F features Post type posts and R625FA has a Post type posts. None of these speakers feature biamping/biwiring.
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 R820F's and Klipsch R625FA's external dimensions. Klipsch R820F has external dimensions of 1096.0 x 277.0 x 426.0mm ( 431/8 x 107/8 x 163/4inch) whereas Klipsch R625FA has external dimensions of 1021.0 x 239.0 x 426.0mm ( 403/16 x 93/8 x 163/4inch) .
Klipsch R625FA is 38mm narrower and 75mm shorter than Klipsch R820F but they have the same thickness of 426.0mm.
Below you can see the front view size comparison of Klipsch R820F and Klipsch R625FA 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 Klipsch R820F is approximately 1180.0cm^{2} / 182.9inch^{2} and base area of the Klipsch R625FA is approximately 1018.1cm^{2} / 157.8inch^{2}. The R820F requires 16% more surface area than the R625FA 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 R820F weighs 24.55kg / 54lbs and the Klipsch R625FA weighs 22.20kg / 48.8lbs. This makes the R820F 11% heavier than the R625FA.
Here is a comparison of how R820F and R625FA's weights compare with the average, max and min weights in Passive Floorstanding class.
Weight
All Floorstanding Speakers
What's in the Box of Klipsch R820F?
Here are the items that are included inside the box of R820F:
Floorstanding loudspeakerGrille (installed)2 Feet4 ScrewsQuick Setup GuideImportant Safety InstructionsWarranty InformationLoudspeaker Feet note
What's in the Box of Klipsch R625FA?
Here are the items that come with the R625FA:
Floorstanding loudspeaker2 Grilles (installed)2 Feet4 ScrewsQuick Setup GuideImportant Safety InstructionsWarranty InformationLoudspeaker Feet note