In this review, we will be comparing S55 and R-620F, two Passive Floor-standing speakers from Polk Audio and Klipsch. Let's have a brief look at the main features
of Polk S55 and Klipsch R-620F first before getting into our more
detailed comparison.
What size room are the Polk S55 and Klipsch R-620F 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 Polk S55 and Klipsch R-620F 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 S55 and R-620F are 2-way speakers.
| Driver |
Polk S55 |
Klipsch R-620F |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1.0-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 6.5-inch
|
S55 features a 1" Terylene Dome Tweeter and 2 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz. On the other hand, the R-620F features a 1.0" Tweeter and 2 x 6.5" Copper-spun IMG Woofer with a Crossover frequency at 2000Hz.
Frequency Response
S55 has a frequency range of 32-40k Hz whereas R-620F has a frequency range of 38-21k Hz. With a minimum frequency of 32Hz, the S55 can go significantly deeper on the low side and provide stronger bass compared to the R-620F'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 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
S55 and R-620F have the same Impedance of 8 ohms but where they differ is the sensitivity levels. S55 sensitivity is rated at 90 dB and the R-620F's is at 96 dB. This 6 dB difference makes the Klipsch R-620F a more sensitive speaker compared to Polk S55, hence will play louder with the same amount of watts.
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.
S55 can handle a max power of 200 watts RMS from the amp the whereas R-620F has a max power handling value of 100 watts RMS, 100 watts less than the S55.
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
S55 features 5-way post posts which make bi-amping or bi-wiring possible. R-620F has a Post which doesn't feature bi-amping/bi-wiring.
Polk S55's 5-way post terminals allows Bi-amping or bi-wiring
Klipsch R-620F's Post terminals
Cabinet Type and Port Position
S55 has a bottom firing port whereas R-620F has a rear firing ports. Polk S55's bottom-firing port gives more flexibility in placement in regards to proximity to walls compared to Klipsch R-620F with its rear-firing port.
Polk S55 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 Polk S55's and Klipsch R-620F's external dimensions. Polk S55 has external dimensions of 1056.0 x 299.0 x 315.0mm ( 41-9/16 x 11-3/4 x 12-3/8inch) whereas Klipsch R-620F has external dimensions of 1021.0 x 239.0 x 369.0mm ( 40-3/16 x 9-3/8 x 14-1/2inch) .
Klipsch R-620F is 60mm narrower and 35mm shorter than Polk S55 but it is also 54mm deeper.
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 Polk S55 is approximately 941.9cm2 / 146.0inch2 and base area of the Klipsch R-620F is approximately 881.9cm2 / 136.7inch2. The S55 requires 7% more surface area than the R-620F 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 Polk S55 weighs 20.00kg / 44lbs and the Klipsch R-620F weighs 18.64kg / 41lbs. This makes the S55 7% heavier than the R-620F.
Here is a comparison of how S55 and R-620F's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
What's in the Box of Polk S55?
Here are the items that are included inside the box of S55:
Floorstanding loudspeakerGrille (attached)4 Feet (pre-installed)Owners ManualOnline Product Registration
What's in the Box of Klipsch R-620F?
Here are the items that come with the R-620F:
Floorstanding loudspeaker Grille (installed) 2 Feet 4 Screws Quick Setup Guide Important Safety Instructions Warranty Information Loudspeaker Feet note
 Max Input Power |
200 watts
vs
100 watts
|
Handle more power from your amplifier |
 Low Frequency Response |
32 Hz
vs
38 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
21k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Price per pair* |
658USD
vs
998USD
|
costs less (*prices may change depending on the seller, location and time) |
 Sensitivity |
96 dB
vs
90 dB
|
Play louder with same amount of amplification power |
 Height |
1021mm
vs
1056mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
881cm2 (239x369mm)
vs
941cm2 (299x315mm)
|
Takes less floor space |
| General |
Polk Audio Signature S55 |
Klipsch Reference R-620F |
| Brand |
Polk Audio |
Klipsch |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
20-200 watts |
up to 100 watts |
| Sensitivity |
90 dB |
96 dB |
| Impedance |
8 ohms |
8 ohms |
| Frequency Response |
32-40k Hz |
38-21k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Mica-reinforced polypropylene |
Copper-spun IMG |
| Woofer Surround Material |
Butyl rubber |
Rubber |
| Tweeter Size |
1" |
1.0" |
| Tweeter Type |
Dome |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2500Hz |
2000Hz |
| Firing Direction |
bottom |
rear |
Physical Specs |
|
|
| Height |
1056.0mm (41.6") |
1021.0mm (40.2") |
| Width |
299.0mm (11.8") |
239.0mm (9.4") |
| Depth |
315.0mm (12.4") |
369.0mm (14.5") |
| Weight |
20.00kg (44lbs) |
18.64kg (41lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
Meddite MDF |
MDF/Wood-grain vinyl |
| Available Colors |
Black |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |