SpeakerDecision
  • SPEAKERS by TYPE
    • Passive Bookshelf Speakers
    • Passive Floor-standing Speakers
    • Passive Center Channel Speakers
    • Passive In-wall Speakers
    • All Passive Speakers
    • Powered Subwoofers
    • Powered Stereo Speakers
  • AMPLIFIERS
  • SMART FIND

KEF Q150 vs Polk S10 Comparison

x
Speaker to replace
Change

KEF Q150

Passive Bookshelf | 51-28k Hz

KEF Q150
CHECK PRICE
Change
    
Polk S10

Passive Bookshelf | 67-40k Hz

Polk Audio Signature S10
CHECK PRICE
KEF Q150 KEF Q150
See at AMAZON
Polk S10 Polk S10
See at AMAZON
KEF Q150
See at AMAZON
Polk S10
See at AMAZON
KEF Q150 vs Polk S10 Speaker Comparison

In this review, we will be comparing Q150 and S10, two Passive Bookshelf speakers from KEF and Polk Audio.

Let's have a brief look at the main features of KEF Q150 and Polk S10 first before getting into our more detailed comparison.

KEF Q150 Key Specs

  • 2-way Design
  • 11th Generation Uni-Q Driver
  • 1" Dome Tweeter
  • 5.25" Aluminum Woofer
  • 51-28k Hz Frequency Response
  • 86 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:10-100watts
  • Weight:5.60kg
  • Dimensions (H x W x D): 303.0" x 7.0" x 10.9"( 303.0 x 180.0 x 278.0mm )

Polk S10 Key Specs

  • 2-way Design
  • 1" Soft-Dome Tweeter
  • 4" Mica-reinforced polypropylene Woofer
  • 67-40k Hz Frequency Response
  • 87 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:20-100watts
  • Weight:2.73kg
  • Dimensions (H x W x D): 214.0" x 5.0" x 6.1"( 214.0 x 127.0 x 155.0mm )

What size room are the KEF Q150 and Polk S10 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* KEF Q150 Polk S10
Near-field Average Average
Small Room Good Good
Mid-size Room Average Average
Large Room Poor Poor
Very Large Room Bad Bad

(* 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 KEF Q150 and Polk S10 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 Q150 and S10 are 2-way speakers.

Driver KEF Q150 Polk S10
Driver Setup 2-way 2-way
Tweeter 1-inch 1-inch
Midrange - -
Woofer 1 x 5.25-inch 1 x 4-inch

Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz. On the other hand, the S10 features a 1" Terylene Soft-Dome Tweeter and 1 x 4" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.

Frequency Response

Q150 has a frequency range of 51-28k Hz whereas S10 has a frequency range of 67-40k Hz. With a minimum frequency of 51Hz, the Q150 can go significantly deeper on the low side and provide stronger bass compared to the S10's min frequency of 67Hz.

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

Q150
S10
Min
Average
Max
High Frequency

Bookshelf Speakers

KEF Q150
Polk S10
Min
Average
Max

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

Q150 and S10 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Q150 sensitivity is rated at 86 dB and the S10's is at 87 dB. This 1 dB difference makes the Polk S10 a more sensitive speaker compared to KEF Q150, hence will play louder with the same amount of watts.

Sensitivity

Bookshelf Speakers

Q150
S10
Min
Average
Max

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.

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

Q150 features 5-way post type posts and S10 has a 5-way post type posts. None of these speakers feature bi-amping/bi-wiring.

KEF Q150 Terminals
KEF Q150's Post terminals

Polk S10 Terminals
Polk S10's 5-way post terminals

Cabinet Type and Port Position

Both Q150 and S10 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.

KEF Q150  Port
KEF Q150 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 KEF Q150's and Polk S10's external dimensions. KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) whereas Polk S10 has external dimensions of 214.0 x 127.0 x 155.0mm ( 8.4 x 5.0 x 6.1inch) .

KEF Q150 is clearly the larger of the two speakers. Its body is 53mm wider, 89mm taller and 123mm deeper than Polk S10.

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 KEF Q150 is approximately 500.4cm2 / 77.6inch2 and base area of the Polk S10 is approximately 196.9cm2 / 30.5inch2. The Q150 requires 154% more surface area than the S10 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 KEF Q150 weighs 5.60kg / 12.3lbs and the Polk S10 weighs 2.73kg / 6lbs. This makes the Q150 105% heavier than the S10.

Here is a comparison of how Q150 and S10's weights compare with the average, max and min weights in Passive Bookshelf class.

Weight
All Bookshelf Speakers
KEF Q150
Polk S10
Min
Average
Max

What's in the Box of KEF Q150?

Here are the items that are included inside the box of Q150:
  • 2 Bookshelf loudspeakers
  • 2 Foam port plugs
  • 8 Self-adhesive rubber feet
  • Owner's Manual
  • Warranty Registration Card
  • What's in the Box of Polk S10?

    Here are the items that come with the S10:
  • 2 Bookshelf loudspeakers
  • 2 Grille (attached)
  • 8 Self-adhesive rubber feet
  • Wall-mount template
  • Owners Manual
  • Online Product Registration

  • Reasons to choose KEF Q150 over Polk Audio Signature S10
    Woofer Size 5.25 inches vs 4 inches Larger woofer
    Low Frequency Response 51 Hz vs 67 Hz Generates deeper bass

    Reasons to choose Polk Audio Signature S10 over KEF Q150

    Sensitivity 87 dB vs 86 dB Play louder with same amount of amplification power
    High Frequency Response 40k Hz vs 28k Hz Generates higher frequency
    Mounting Bracket Yes vs No Allows mounting on walls
    Height 214mm vs 303mm Easier to fit in smaller spaces
    Base Surface Area 196cm2 vs 500cm2 Takes less floor space
    KEF Q150 vs Polk S10 Specs Table
    Detailed comparison of specifications
    General KEF Q150 Polk Audio Signature S10
    Brand KEF Polk Audio
    Speaker Type Bookshelf speakers Satellite speakers
    Power Range 10-100 watts 20-100 watts
    Sensitivity 86 dB 87 dB
    Impedance 8 ohms 8 ohms
    Impedance 3.7 ohms n/a
    Frequency Response 51-28k Hz 67-40k Hz
    Drivers
    Woofer Quantity 1 1
    Woofer Size 5.25" 4"
    Woofer Composition Aluminum Mica-reinforced polypropylene
    Woofer Surround Material Rubber Butyl rubber
    Tweeter Size 1" 1"
    Tweeter Type Dome Soft-Dome
    Aimable Tweeter No No
    Midrange Driver No No
    Crossover Frequency 2500Hz 2500Hz
    Firing Direction rear rear
    Physical Specs
    Height 303.0mm (11.9") 214.0mm (8.4")
    Width 180.0mm (7.1") 127.0mm (5")
    Depth 278.0mm (10.9") 155.0mm (6.1")
    Weight 5.60kg (12.3lbs) 2.73kg (6lbs)
    Enclosure Bass Reflex Bass Reflex
    Finish MDF/Vinyl-wrapped Meddite MDF
    Available Colors Black, Walnut, White Black
    Mounting Bracket No Keyhole
    Recommended Stand Height 18-24" 28-31"
    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

    Most Popular Speakers
    Klipsch Reference R-51M
    Klipsch R-51M
    2-way | 93 dB | 8 ohms
    Wharfedale Elysian 2
    Wharfedale Elysian 2
    3-way | 89 dB | 4 ohms
    ELAC Debut 2.0 B6.2
    ELAC Debut 2.0 B6.2
    2-way | 87 dB | 6 ohms
    Bowers & Wilkins 606 S2 Anniversary Edition
    B&W 606 S2
    2-way | 88 dB | 8 ohms
    KEF Q150
    KEF Q150
    2-way | 86 dB | 8 ohms
    Klipsch Reference Premiere RP-500M
    Klipsch RP-500M
    2-way | 93 dB | 8 ohms
    Wharfedale EVO4.1
    Wharfedale EVO4.1
    2-way | 87 dB | 8 ohms
    Bowers & Wilkins 606
    B&W 606
    2-way | 88 dB | 8 ohms
    Copyright © 2025 by SpeakerDecision
    About Privacy Contact US Camera Decision

    Report a Correction