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Crutchfield

Focal K2 Power 100KRS

4" component speaker system

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  • Focal K2 Power 100KRS

    Front

  • Focal K2 Power 100KRS

    Crossover network

  • Focal K2 Power 100KRS

  • Focal K2 Power 100KRS

    Woofer (front)

  • Focal K2 Power 100KRS

    Woofer (rear)

  • Focal K2 Power 100KRS

    Woofer (side view)

 

Our take on the Focal K2 Power 100KRS

by Buck Pomerantz
Focal

Why install component speakers?

A component speaker system gives you the best possible performance from your car audio system. A system consists of separate woofers, tweeters, and crossovers, each designed to cover one specific range of frequencies. As separate components, the woofer can move freely to deliver more powerful performance, while the tweeter can be custom-mounted in a better spot up closer to your ears, revealing a whole new world of detail. Separate crossovers are far superior to the simple filters wired into full-range speakers, so the components work together for smoother, more focused sound.

K2 Power speakers — engineered for superb sound

Side view of K2 Power speaker

At Focal, all that matters is music. Focal's sound gurus engage in intensive listening sessions as they design a new line of speakers, making it their mission to create products that deliver uncanny realism, sweeping dynamics, and breathtaking depth. During the hands-on production process, they test every model meticulously to ensure that they meet Focal's exacting standards.


Focal's "Power Hi-Fi" philosophy

The K2 Power 100KRS 4" component speaker system bears the hallmarks of Focal's "Power Hi-Fi" philosophy. The nimble Aramid and glass-fiber woofers demonstrate the control needed to reproduce delicate classical passages, yet they'll handle the power needed to drive your bass-heavy music with authority. The sturdy zinc-aluminum alloy baskets are non-magnetic so they won't interfere with the speaker's own electronics.


Inverted dome tweeter design

Inverted dome tweeter design

Focal's inverted dome tweeters act like little woofers, dispersing the highs in a wide pattern to create an exceptionally natural soundstage. K2 Power crossovers use hand-made components developed by Focal to deliver an ideal blend of the highs and lows for a dynamic stereo image. Three levels of tweeter and two levels of midrange control let you dial in the sound to your car's environment.


Woofer cone construction K2 Power crossover network

Highlights:

  • component speaker system includes two 4" woofers, 2 tweeters, 2 external crossovers, and 2 woofer grilles
  • K2 composite woofer cone (Aramid, foam, and glass fiber)
  • butyl rubber surround
  • 1-3/4" woven Aramid fiber inverted-dome tweeter
  • 2-way external crossover with 3 tweeter and 2 midrange level settings
  • 4-ohm impedance
  • power range: 6-50 watts RMS (100 watts peak power)
  • frequency response: 120-20,000 Hz
  • sensitivity: 90 dB @ 2.83 V
  • mounting depth: 1-9/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Speaker Size
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4
Design
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2-way
Tweeter Design
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Inverted Dome
Tweeter Composition
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Kevlar
Woofer Composition
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K2 Composite
Woofer Surround
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Butyl Rubber
Parts Warranty
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1 Year
Labor Warranty
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1 Year
Specifications
Sensitivity
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90 dB
Frequency Response
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120 - 20k Hz
RMS Power Range (Watts)
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6-50
Peak Power Handling (Watts)
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100
Impedance (Ohms)
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4
Top-mount Depth (Inches)
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1 5/8
Bottom-mount Depth (Inches)
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1 13/16
Cutout Diameter or Length (inches)
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3 11/16
Product Research
What's in the box?

Download owner's manual

  • Two 4" Woofers
  • Two inverted dome tweeters (with attached 23" length of speaker wire)
  • 2 Tweeter flush mount cups (installed)
  • 2 Tweeter angle mount cups
  • Tweeter removal tool
  • 2 Crossover networks
  • 2 Woofer grilles
  • 2 Woofer grille mounting rings
  • 2 Tweeter flush mount clamps
  • 2 Woofer mounting gaskets
  • 8 Speed clips
  • 2 Machine screws (for flush mounting)
  • Four 5/8" Self-tapping screws
  • Sixteen 1" Self-tapping screws
  • Owner's manual (English/ French)
  • Focal window sticker
  • Serial number card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Woofer
Tweeter
Crossover
Dimensions

Woofer

K2 Cone: The woofer cone is a sandwich composite consisting of a foam core, a structural glass fiber bottom layer, and a Kevlar top layer. This combination of materials results in a rigid, light weight cone with excellent damping characteristics.

Surround: The butyl rubber surround is resistant to ultraviolet rays, temperature extremes, and humidity to add to the speaker's reliability and longevity.

Phase Plug: The bullet-shaped aluminum phase plug in the center of the woofer ensures a smooth, flat off-axis frequency response by preventing the high frequency sound waves emanating from one side of the cone from interfering with sound waves from the other side of the cone.

Zamak Basket: The woofer features a cast Zamak basket. Zamak is a rigid alloy of Zinc, Aluminum, Magnesium, and Copper. Zamak is non-magnetic.

Voice Coil: The voice coil is wound around a 1" diameter low-mass Kapton former, ensuring no coil deformation.

Neodymium Magnets: The speaker uses a Neodymium magnet, which has the same magnetic flux power as a ceramic magnet 10 times its size, reducing the size and weight of the speaker.

Tweeter

Inverted Dome Tweeter: The tweeter is an inverted Kevlar dome, producing a broad sound stage. The tweeter has a Neodymium magnet to provide a powerful magnetic field for the voice coil, while still maintaining the tweeter's compact dimensions.

Mounting Options: The tweeter can be surface or flush mounted using the included adapters. Focal recommends flush mounting, but the included angled cup allows surface mounting at one of two angles; approximately 15° and approximately 40°.

Crossover

Components: Focal uses audiophile grade polypropylene capacitors and air core inductors to ensure high definition and a dynamic sound quality.

Tweeter Level: You can adjust the output level of the tweeter on the crossover to -6 dB, -3 dB, or 0 dB.

Midrange Level: Set the midrange output to High or Flat to match their position in the car. When the mids are installed low in the door, some of the output is absorbed by the upholstery and they benefit from the High output setting.

Crossover Slopes: The crossover uses 2nd order, 12 dB per octave low-pass and high-pass filters. The crossover frequency for both is 3,500 Hz.

Wiring: The inputs and outputs are screw terminals; they will accept bare wire or spade connectors up to 0.315" wide.

Dimensions

Tweeters:

  Flush Mount Angled Surface Mount
Mounting Height 0.295" 1.236"
Depth 0.96" 0.542" (screw depth)
Frame Diameter 2.055" 1.840"
Cutout Diameter 1.828" N/A

Crossover: The crossover dimensions are:

  • Width: 4.915"
  • Height: 1.335"
  • Depth: 3.736"
 

Product reviews from the Crutchfield Labs (what are the Labs?)

Video: Introduction to Focal Car Audio

Video: Introduction to Focal Car Audio

by Zak Billmeier, Ken Nail
8/9/2013
 
Video: Introduction to Focal Car Audio

Crutchfield's car audio experts Ken and Zak present an overview of Focal car audio products. Focal is a leading name in high-quality sound and Crutchfield is proud to have them in our lineup.

 
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Focal K2 Power 100KRS Reviews

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5 out of 5

Tiny but mighty

Written By ChadP, Ladoga,IN on Sunday, September 29, 2013
Crutchfield Customer Review (What's this?)
 
I got these to replace some JL 3.5" speakers my installer had used about a year ago. At the time I was aware of these but didn't want to spend alot of money. With a price drop I decided to give them a try because they are the only nice 4" speakers that will fit a BMW X3 and handle the power of an after market amp. All I can say is WOW, what a difference they made. I'm going for a stealth stock look so the factory head unit goes to a Clarion cleansweep oem interface coupled to a JL 5 ch XD 100x4 & 300X1 that runs an Alpine 10" marine sub that used the space of one of the storage cubbies in back in a custom enclosure so that it looks just like it came with the car and takes up no extra space in the cargo area. The amp and interface fit just right in the battery area under the rear cargo hold. Somewhere behind the side panel is a dice interface so that the stock radio controls SiriusXM. This setup is very loud but clean. there is no clipping, rattling(thanks Dynamat), or other distractions. I went for a more refined audiophile sound and these speakers are great for that while still being able to rock out and feel your insides melt. If you have limited mounting depth as I did these are probably the best speakers in a 4" size.
Pros:
Great fidelity Decent power handling Compact Very attractive
Cons:
While worth it they are very expencive
5 out of 5 people found this helpful
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For a more in-depth review and enhanced detailed information on the Focal K2 Power 100KRS, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_091100KRS/Focal-K2-Power-100KRS.html ).