In this review, we will be comparing two different type of speakers by Polk Audio. Polk Audio Signature Elite ES15 is a Bookshelf speaker whereas the ES55 is a Floor-standing speaker.
Let's have a brief look at the main features
of Polk ES15 and Polk ES55 first before getting into our more
detailed comparison.
Polk ES15 Key Specs
- 2-way Design
- 1" Soft-Dome Tweeter
- 5.25" Mica-reinforced polypropylene Woofer
- 44-40k Hz Frequency Response
- 85 dB Sensitivity
- Impedance: 8ohms
- Power Range:20-100watts
- Weight:5.91kg
- Dimensions (H x W x D): 307.0" x 7-9/16" x 10-3/16"( 307.0 x 193.0 x 259.0mm )
Polk ES55 Key Specs
- 2-way Design
- 1" Soft-Dome Tweeter
- 3 x 6.5" Mica-reinforced polypropylene Woofer
- 34-40k Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 8ohms
- Power Range:40-200watts
- Weight:20.00kg
- Dimensions (H x W x D): 1056.0" x 8-1/2" x 12-3/8"( 1056.0 x 216.0 x 315.0mm )
ES15 and ES55 are members of Polk Audio's Signature Elite series of speakers. Below you can find the loudspeakers from this series.
What size room are the Polk ES15 and Polk ES55 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* |
Polk ES15 |
Polk ES55 |
| Near-field |
Average |
Bad |
| Small Room |
Good |
Poor |
| Mid-size Room |
Average |
Good |
| Large Room |
Poor |
Good |
| 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 Polk ES15 and Polk ES55 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 ES15 and ES55 are 2-way speakers.
| Driver |
Polk ES15 |
Polk ES55 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
3 x 6.5-inch
|
ES15 features a 1" Terylene Soft-Dome Tweeter and 1 x 5.25" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz. On the other hand, the ES55 features a 1" Terylene High-Res Soft-Dome Tweeter and 3 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.
Frequency Response
ES15 has a frequency range of 44-40k Hz whereas ES55 has a frequency range of 34-40k Hz. With a minimum frequency of 34Hz, the ES55 can go significantly deeper on the low side and provide stronger bass compared to the ES15's min frequency of 44Hz.
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 Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf 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
ES15 and ES55 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. ES15 sensitivity is rated at 85 dB and the ES55's is at 89 dB. This 4 dB difference makes the Polk ES55 a more sensitive speaker compared to Polk ES15, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf 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.
ES15 can handle a max power of 200 watts RMS from the amp the whereas ES15 has a max power handling value of 100 watts RMS , 100 watts less than the ES55.
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
ES55 features 5-Way post posts which make bi-amping or bi-wiring possible. ES15 has a 5-Way post which doesn't feature bi-amping/bi-wiring.
Polk ES15's 5-Way post terminals
Cabinet Type and Port Position
ES15 has a rear firing port whereas ES55 has a bottom firing ports. Polk ES55's bottom-firing port gives more flexibility in placement in regards to proximity to walls compared to Polk ES15 with its rear-firing port.
Polk ES15 Power Port 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 ES15's and Polk ES55's external dimensions. Polk ES15 has external dimensions of 307.0 x 193.0 x 259.0mm ( 12-1/16 x 7-9/16 x 10-3/16inch) whereas Polk ES55 has external dimensions of 1056.0 x 216.0 x 315.0mm ( 41-9/16 x 8-1/2 x 12-3/8inch) .
Polk ES55 is clearly the larger of the two speakers. Its body is 23mm wider, 749mm taller and 56mm deeper than Polk ES15.
Below you can see the front view size comparison of Polk ES15 and Polk ES55 in scale.
Comparison image of Polk ES15 and Polk ES55 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 Polk ES15 is approximately 499.9cm2 / 77.5inch2 and base area of the Polk ES55 is approximately 680.4cm2 / 105.5inch2. The ES15 requires 27% less surface area than the ES55 which gives it a small advantage on placement in tight spaces.
What's in the Box of Polk ES15?
Here are the items that are included inside the box of ES15:
2 Bookshelf loudspeakers2 Grille (attached)8 Self-adhesive rubber feetWall-mount templateOwners ManualOnline Product Registration
What's in the Box of Polk ES55?
Here are the items that come with the ES55:
Floorstanding loudspeakerGrille (attached)4 Feet (pre-installed)Owners ManualOnline Product Registration
Mounting Bracket 
Height 
Base Surface Area 
Price per pair* 
Max Input Power 
Sensitivity 
Woofer Size 
Bi-Amping and Bi-Wiring