In this review, we will be comparing XT15 and TSi100, two Passive Bookshelf speakers by Polk Audio Let's have a brief look at the main features
of Polk XT15 and Polk TSi100 first before getting into our more
detailed comparison.
What size room are the Polk XT15 and Polk TSi100 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 XT15 and Polk TSi100 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking
through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both XT15 and TSi100 are 2-way speakers.
| Driver |
Polk XT15 |
Polk TSi100 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 5.25-inch
|
XT15 features a 1" Soft-Dome Tweeter and 1 x 5.25" Bi-laminate paper Woofer . On the other hand, the TSi100 features a 1" Dome Tweeter and 1 x 5.25" Organic Fiber Woofer with a Crossover frequency at 2500Hz.
Frequency Response
XT15 has a frequency range of 48-40k Hz whereas TSi100 has a frequency range of 61-24k Hz. With a minimum frequency of 48Hz, the XT15 can go significantly deeper on the low side and provide stronger bass compared to the TSi100's min frequency of 61Hz.
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
XT15 and TSi100 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. XT15 sensitivity is rated at 86 dB and the TSi100's is at 89 dB. This 3 dB difference makes the Polk TSi100 a more sensitive speaker compared to Polk XT15, 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.
XT15 can handle a max power of 150 watts RMS from the amp the whereas TSi100 has a max power handling value of 100 watts RMS, 50 watts less than the XT15.
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
XT15 features Pair of 5-way Binding Posts - Gold-Plated type posts and TSi100 has a Pair of 5-way Binding Posts - Gold-Plated type posts. None of these speakers feature bi-amping/bi-wiring.
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 XT15's and Polk TSi100's external dimensions. Polk XT15 has external dimensions of 270.0 x 167.0 x 183.0mm ( 10-5/8 x 6-9/16 x 7-3/16inch) whereas Polk TSi100 has external dimensions of 279.4 x 177.8 x 259.0mm ( 11.0 x 7.0 x 10.1inch) .
Polk TSi100 is clearly the larger of the two speakers. Its body is 10.8mm wider, 9.4mm taller and 76mm deeper than Polk XT15.
Below you can see the front view size comparison of Polk XT15 and Polk TSi100 in scale.
Comparison image of Polk XT15 and Polk TSi100 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 XT15 is approximately 305.6cm2 / 47.4inch2 and base area of the Polk TSi100 is approximately 460.5cm2 / 71.4inch2. The XT15 requires 34% less surface area than the TSi100 which gives it a small advantage 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:
Size Comparison image of Polk XT15 and Polk TSi100 on a Media Console
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 XT15 weighs 4.09kg / 9lbs and the Polk TSi100 weighs 4.53kg / 10lbs. This makes the TSi100 11% heavier than the XT15.
Here is a comparison of how XT15 and TSi100's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Polk XT15?
Here are the items that are included inside the box of XT15:
2 Bookshelf loudspeakers2 Grilles (attached)8 Self-adhesive rubber feetOwners ManualOnline Product Registration
What's in the Box of Polk TSi100?
Here are the items that come with the TSi100:
2 Black bookshelf speakers Detachable cloth grille (installed) 8 Self-adhesive rubber feet Owner's Manual Wall-Mount template Online registration sheet Polk Audio product brochure
 Max Input Power |
150 watts
vs
100 watts
|
Handle more power from your amplifier |
 Low Frequency Response |
48 Hz
vs
61 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
24k Hz
|
Generates higher frequency |
 Height |
270mm
vs
279mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
305cm2 (167x183mm)
vs
460cm2 (177x259mm)
|
Takes less floor space |
 Sensitivity |
89 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 Mounting Bracket |
Yes
vs
No
|
Allows mounting on walls |
 Price per pair* |
149USD
vs
199USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Polk Audio Monitor XT15 |
Polk Audio TSi100 |
| Brand |
Polk Audio |
Polk Audio |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
30-150 watts |
20-100 watts |
| Sensitivity |
86 dB |
89 dB |
| Impedance |
8 ohms |
8 ohms |
| Frequency Response |
48-40k Hz |
61-24k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
5.25" |
| Woofer Composition |
Bi-laminate paper |
Organic Fiber |
| Woofer Surround Material |
Rubber |
Butyl Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
2500Hz |
| Firing Direction |
n/a |
rear |
Physical Specs |
|
|
| Height |
270.0mm (10.6") |
279.4mm (11") |
| Width |
167.0mm (6.6") |
177.8mm (7") |
| Depth |
183.0mm (7.2") |
259.0mm (10.2") |
| Weight |
4.09kg (9lbs) |
4.53kg (10lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF, Vinyl |
Wood-grain vinyl |
| Available Colors |
Black |
Black, Cherry |
| Mounting Bracket |
No |
Keyhole |
| Recommended Stand Height |
28-32" |
16-30" |
| 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 |