Polk S15 vs S20

Polk S15 vs S20 – What Makes Polk S20 A Better Speaker?


Polk S15 vs S20Polk S15 & S20 are two great bookshelf speakers for home entertainment purposes. Between these two, Polk S20 comes with some advanced features that made this speaker a better choice.

What Makes Polk S20 A Better Choice?

  • The Polk S20 comes with a lower frequency response of 39Hz that will provide you a better bass than the Polk S15 with a lower frequency of 50Hz.
  • This Home Theatre speaker comes with different variants of the additional subwoofer, while the other one has only one variant.
  • Polk S20 comes in a larger size, and this one will be perfect for larger room sizes, whereas the Polk S15 is suitable for smaller rooms.

These are the unique specs that made the Polk S20 winner in this comparison. This speaker will surely give you the ultimate experience of home entertainment.


Similar Features

  • They both come with Powerport technology for deeper bass.
  • The speakers come with a max sensitivity of 88 dB.
  • They are very lightweight. So, carrying them is much comfortable.
  • Both the speakers are designed for the dynamic acoustic array.

You will get these similar functions with both speakers. But if you want the best sound quality with some improved features then you have to pick Polk S20.

Quick Comparison: Polk S15 vs S20

Specifications Polk S15 Polk S20
Editor’s Rating  4.8 out of 5 4.8 out of 5
Color Black Black
Type Home Theatre/Bookshelf Speaker Home Theatre/Bookshelf Speaker
Product Dimension 10.2 x 7.5 x 12 inches 13.8 x 8.5 x 14.8 inches
Product Weight 13 pounds 17 pounds
Frequency 50 Hz – 40 kHz 39 Hz – 40 kHz
Max Sensitivity 88 dB 88 dB
Amplifier Power 20-100 Watts 20-125 Watts
Speaker Size 5.25 inch 6.5 inch
Warranty 5-Year of Warranty 5-Year of Warranty

Differences and Similarities Between Polk S15 and S20


The speakers come in a pair and are designed in a rectangle shape. The bold, dramatic look will surely give your setup a premium feel. You can place them anywhere, whether it’s a book or a television shelf. The speakers have iconic curved edges for a performance-oriented stylish look. Polk S20 is relatively larger in width than the Polk S15; otherwise, they look the same. 


The speakers are perfect for any home entertainment or setting. You can use them as front or rear or even surround in a stereo sound system. They can be used as 2.1. 3.1 or 5.1 configurations. The speakers are perfect for a room-filling sound. Especially the S20 is suitable for any room for its powerful and strong sound.

Audio Performance

The Polk S20 will deliver you big, reliable surround sound. The dynamic balance acoustic array of this speaker will provide you crystal clear audio that will be great to hear, and every detail can be felt.

Polk S20 has a 6.5-inch driver and a 1 inch Terylene tweeter that will give you exceptional audio output. The other one, Polk S15, comes with a 5.25-inch dynamic balance driver that will enhance your music or movies’ sound quality. This speaker guarantees you punchy music at any volume.

Pair Speakers

You’ll be able to link them with other devices for a more efficient home theater setup. The Polk S15 can be paired with S50 tower speakers and an S35 center channel for a 5.1 or a 7.1 system. On the other hand, Polk S20 can also be paired with the Signature series for an enhanced home theater system.

Frequency Range

The range of frequencies is better on the Polk S20. This speaker comes with lower frequency support that will provide you e deep bass with crisp sound. The frequency rate of the Polk S20 is 39 Hz – 40 kHz. The other device, Polk S15, has a frequency range of 50 Hz to 40 kHz.


Polk’s Patented Powerport technology will give you a deeper bass without any distortion. The air movement from the speaker to your listening area is seamlessly transitioned with this technology. Both the Polk S15 and S20 have this Powerport technology included. These speakers will enhance your watching experience and give you a premium experience for sure.

Durability & Warranty

The speakers come with premium build quality that will give you long-term usage without any doubt as they are home speakers & will be placed in a specific place to get damaged easily. Polk provides a 5-year warranty so that you can use this device with peace of mind.


Both the Polk S15 & S20 are quite similar home speaker devices. They are perfect for home entertainment. The Pols S20 is ideal in every aspect and will give you the best performance doesn’t matter what the room size is. Polk S15 can be an option if you look for an ordinary home speaker for the usual room size.

Frequently Asked Questions about Polk S15 & S20

Do they come in a pair?

Yes. They mentioned the price is for a pair.

Can I mount them into the wall?

Sure. They are designed to place them into walls. 

What is the width of the Polk S15?

The width of the Polk S15 is around 7.5-inch.

Do they both have the Powerport technology?

Yes. Both the Polk S15 & S20 have the Powerport for deeper bass.

What is the max sensitivity of the speakers?

The max sensitivity of the devices is 88 dB.

You can check more comparisons about speakers here.

Leave a Reply