In this review, we will be comparing TSi400 and S50, two Passive Floor-standing speakers by Polk Audio
Let's have a brief look at the main features
of Polk TSi400 and Polk S50 first before getting into our more
detailed comparison.
Polk TSi400 Key Specs
- 2-way Design
- 1" Tweeter
- 3 x 5.25" Organic Fiber Woofer
- 44-24k Hz Frequency Response
- 91 dB Sensitivity
- Impedance: 8ohms
- Power Range:20-200watts
- Weight:14.55kg
- Dimensions (H x W x D): 985.0" x 8-3/16" x 14-1/2"( 985.0 x 208.0 x 369.0mm )
Polk S50 Key Specs
- 2-way Design
- 1" Dome Tweeter
- 2 x 5.25" Mica-reinforced polypropylene Woofer
- 33-40k Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 8ohms
- Power Range:20-150watts
- Weight:14.50kg
- Dimensions (H x W x D): 951.0" x 10-5/16" x 11-1/16"( 951.0 x 262.0 x 281.0mm )
What size room are the Polk TSi400 and Polk S50 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 TSi400 |
Polk S50 |
| Near-field |
Bad |
Bad |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Good |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Poor |
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 TSi400 and Polk S50 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 TSi400 and S50 are 2-way speakers.
| Driver |
Polk TSi400 |
Polk S50 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
3 x 5.25-inch
|
2 x 5.25-inch
|
TSi400 features a 1" Tweeter and 3 x 5.25" Organic Fiber Woofer . On the other hand, the S50 features a 1" Terylene Dome Tweeter and 2 x 5.25" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.
Frequency Response
TSi400 has a frequency range of 44-24k Hz whereas S50 has a frequency range of 33-40k Hz. With a minimum frequency of 33Hz, the S50 can go significantly deeper on the low side and provide stronger bass compared to the TSi400'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 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
TSi400 and S50 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. TSi400 sensitivity is rated at 91 dB and the S50's is at 89 dB. This 2 dB difference makes the Polk TSi400 a more sensitive speaker compared to Polk S50, 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.
TSi400 can handle a max power of 200 watts RMS from the amp the whereas S50 has a max power handling value of 150 watts RMS, 50 watts less than the TSi400.
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
Both TSi400 and S50 features dual binding post speaker terminals for bi-amping or bi-wiring.
Polk S50's 5-way post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both TSi400 and S50 have bottom firing ports.
Polk S50 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 TSi400's and Polk S50's external dimensions. Polk TSi400 has external dimensions of 985.0 x 208.0 x 369.0mm ( 38-3/4 x 8-3/16 x 14-1/2inch) whereas Polk S50 has external dimensions of 951.0 x 262.0 x 281.0mm ( 37-7/16 x 10-5/16 x 11-1/16inch) .
Polk S50 is 34mm shorter and 88mm less deeper than Polk TSi400 but it is also 54mm wider.
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 TSi400 is approximately 767.5cm2 / 119.0inch2 and base area of the Polk S50 is approximately 736.2cm2 / 114.1inch2. The TSi400 requires 4% more surface area than the S50 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 TSi400 weighs 14.55kg / 32lbs and the Polk S50 weighs 14.50kg / 31.9lbs. This makes the TSi400 0% heavier than the S50.
Here is a comparison of how TSi400 and S50'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 TSi400?
Here are the items that are included inside the box of TSi400:
Tower speakerDetachable cloth grille (installed)Owners ManualWall-Mount templateOnline registration sheetPolk Audio product brochure
What's in the Box of Polk S50?
Here are the items that come with the S50:
Floorstanding loudspeakerGrille (attached)4 Feet (pre-installed)Owners ManualOnline Product Registration
 Max Input Power |
200 watts
vs
150 watts
|
Handle more power from your amplifier |
 Sensitivity |
91 dB
vs
89 dB
|
Play louder with same amount of amplification power |
 Number of Woofers |
3
vs
2
|
More woofers |
|
Low Frequency Response |
33 Hz
vs
44 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
24k Hz
|
Generates higher frequency |
 Height |
951mm
vs
985mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
736cm2
vs
767cm2
|
Takes less floor space |
| General |
Polk Audio TSi400 |
Polk Audio Signature S50 |
| Brand |
Polk Audio |
Polk Audio |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
20-200 watts |
20-150 watts |
| Sensitivity |
91 dB |
89 dB |
| Impedance |
8 ohms |
8 ohms |
| Frequency Response |
44-24k Hz |
33-40k Hz |
Drivers |
|
|
| Woofer Quantity |
3 |
2 |
| Woofer Size |
5.25" |
5.25" |
| Woofer Composition |
Organic Fiber |
Mica-reinforced polypropylene |
| Woofer Surround Material |
Butyl Rubber |
Butyl rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
n/a |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
2500Hz |
| Firing Direction |
bottom |
bottom |
Physical Specs |
|
|
| Height |
985.0mm (38.8") |
951.0mm (37.4") |
| Width |
208.0mm (8.2") |
262.0mm (10.3") |
| Depth |
369.0mm (14.5") |
281.0mm (11.1") |
| Weight |
14.55kg (32lbs) |
14.50kg (31.9lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
Wood-grain vinyl |
Meddite MDF |
| Available Colors |
Cherry |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |