In this review, we will be comparing Imagine XB and ES20, two Passive Bookshelf speakers from PSB and Polk Audio. Let's have a brief look at the main features
of PSB Imagine XB and Polk ES20 first before getting into our more
detailed comparison.
What size room are the PSB Imagine XB and Polk ES20 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 PSB Imagine XB and Polk ES20 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 Imagine XB and ES20 are 2-way speakers.
| Driver |
PSB Imagine XB |
Polk ES20 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 6.5-inch
|
Imagine XB features a 1" Titanium Dome with Ferrofluid Hard-Dome Tweeter and 1 x 5.25" Clay/Ceramic/Poly Woofer with a Crossover frequency at 1800Hz. On the other hand, the ES20 features a 1" Terylene Soft-Dome Tweeter and 1 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Imagine XB has a frequency range of 55-23k Hz whereas ES20 has a frequency range of 41-40k Hz. With a minimum frequency of 41Hz, the ES20 can go significantly deeper on the low side and provide stronger bass compared to the Imagine XB's min frequency of 55Hz.
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
Imagine XB and ES20 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Imagine XB sensitivity is rated at 87 dB and the ES20's is at 86 dB. This 1 dB difference makes the PSB Imagine XB a more sensitive speaker compared to Polk ES20, 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.
Imagine XB can handle a max power of 150 watts RMS from the amp the whereas ES20 has a max power handling value of 125 watts RMS, 25 watts less than the Imagine XB.
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
Imagine XB features 5-Way post type posts and ES20 has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both Imagine XB and ES20 have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
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 PSB Imagine XB's and Polk ES20's external dimensions. PSB Imagine XB has external dimensions of 302 x 170 x 271mm ( 12inch x 6.75inch x 10.75inch ) whereas Polk ES20 has external dimensions of 375.0 x 218.0 x 351.0mm ( 14-3/4 x 8-9/16 x 13-13/16inch) .
Polk ES20 is clearly the larger of the two speakers. Its body is 48mm wider, 73mm taller and 80mm deeper than PSB Imagine XB.
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 PSB Imagine XB is approximately 460.0cm2 / 71.3inch2 and base area of the Polk ES20 is approximately 765.2cm2 / 118.6inch2. The Imagine XB requires 40% less surface area than the ES20 which gives it a small advantage 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 PSB Imagine XB weighs 5.60kg / 12.3lbs and the Polk ES20 weighs 7.73kg / 17lbs. This makes the ES20 38% heavier than the Imagine XB.
Here is a comparison of how Imagine XB and ES20's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of PSB Imagine XB?
Here are the items that are included inside the box of Imagine XB:
2 Bookshelf loudspeakers2 Grilles8 Rubber feetQuick Start GuideWarranty Card
What's in the Box of Polk ES20?
Here are the items that come with the ES20:
2 Bookshelf loudspeakers2 Grille (attached)8 Self-adhesive rubber feetOwners ManualOnline Product Registration
 Max Input Power |
150 watts
vs
125 watts
|
Handle more power from your amplifier |
 Sensitivity |
87 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 Height |
302mm
vs
375mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
460cm2 (170x271mm)
vs
765cm2 (218x351mm)
|
Takes less floor space |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
41 Hz
vs
55 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
23k Hz
|
Generates higher frequency |
 Price per pair* |
399USD
vs
649USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
PSB Imagine XB |
Polk Audio Signature Elite ES20 |
| Brand |
PSB |
Polk Audio |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
20-150 watts |
20-125 watts |
| Sensitivity |
87 dB |
86 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
4 ohms |
n/a |
| Frequency Response |
55-23k Hz |
41-40k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
6.5" |
| Woofer Composition |
Clay/Ceramic/Poly |
Mica-reinforced polypropylene |
| Woofer Surround Material |
Rubber |
Butyl rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Hard-Dome |
Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
1800Hz |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
302.0mm (11.9") |
375.0mm (14.8") |
| Width |
170.0mm (6.7") |
218.0mm (8.6") |
| Depth |
271.0mm (10.7") |
351.0mm (13.8") |
| Weight |
5.60kg (12.3lbs) |
7.73kg (17lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain |
MDF, Wood-grain vinyl |
| Available Colors |
Black |
Black,White,Walnut |
| Mounting Bracket |
|
No |
| Recommended Stand Height |
24-26" |
22-26" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |