What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Our take on the Focal K2 Power™ 27 KX

by Dominic Devito

This sub's name gets straight to the point — Focal's K2 Power subwoofer delivers hard-hitting low end that combines realistic reproduction with competition-level sound pressure. Precision engineering and hand-assembled construction make this sub a sound choice for a high-performance bass system.

Powerful magnet
A massive multi-element magnet provides the backbone for the sub's powerful reputation — its circular array provides a uniform field across the entire width of the sub, driving the motor assembly with unerring precision. Focal anchors the K2 Power sub with a rugged zamak zinc alloy basket for dependable performance that won't get bent out of shape by your music.

3-layer cone
At the top end of the sub, a butyl rubber surround maintains control of the cone, even during deep excursion. Focal's unique composite sandwich cone employs a structural foam central core coated with a layer of Aramid fiber on the front and a glass layer on the back side. The three layers together form an incredibly rigid yet lightweight membrane for high-quality sound reproduction with the added emphasis of thunderous sound pressure.

Assembled and inspected by hand
You can feed the K2 Power 27 KX 11" subwoofer up to 300 watts RMS without fear. This 4-ohm sub works best in sealed enclosures to produce bass that's highly accurate and plenty forceful. Focal assembles each sub by hand and rigorously inspects them for any flaws to ensure your investment performs to the high sound standards they've set.

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Highlights:

11" 4-ohm subwoofer
Aramid fiber/foam/glass composite sandwich cone with butyl rubber surround
multiferrite magnet for precise motor structure linearity
zamak (zinc alloy) basket
power range: 100-300 watts RMS
peak power handling: 600 watts
frequency response: 35-1,500 Hz
sensitivity: 81.21 dB
top-mount depth: 4-11/16"
sealed box volume: 0.71-1.41 cubic feet
warranty: 1 year
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Features and specs chart | What’s in the box? | In-depth notes

Features and Specs


Size Loading...	11 -inch
Impedance Loading...	4 ohms
Cone Material Loading...	Kevlar/foam/glass
Surround Material Loading...	Butyl rubber
Ideal Sealed Box Volume (cubic feet) Loading...	1.06
Ideal Ported Box Volume (cubic feet) Loading...	N/A
Port diameter (inches) Loading...	N/A
Port length (inches) Loading...	N/A
Free-Air Loading...	No
Dual Voice Coil Loading...	No
Sensitivity Loading...	88 dB at 2.83 watts 81.21 dB at 1 watt
Frequency Response Loading...	35 - 1500 Hz
RMS Power Range (Watts) Loading...	100-300
Peak Power Handling (Watts) Loading...	600
Top Mount Depth (inches) Loading...	4 11/16
Bottom Mount Depth (inches) Loading...	N/A
Cutout Diameter or Length (inches) Loading...	9 3/16
Vas (liters) Loading...	14.92
Fs (Hz) Loading...	48
Qts Loading...	0.908
Xmax (millimeters) Loading...	9
Parts Warranty Loading...	1 Year
Labor Warranty Loading...	1 Year

Product Research

What's in the box?

Download owner's manual

11" SVC 4-ohm woofer
6 Hex-head mounting bolts
6 Nuts
Self-adhesive foam gasket
Cloth cover (for magnet)
User/Warranty Manual (Eng/Fre)
Serial number card
FOCAL logo sticker
"Remove Before Using" note (attached to speaker terminals of woofer)

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.

Features
Enclosure Compatibility

Features

K2 Composite Sandwich Membrane/Cone: The FOCAL K2 Power 27KX features a composite sandwich membrane/cone comprising of Kevlar, foam, and a Kevlar material structure that is rigid, yet light weight, and allows fast bass response without distortion. This cone structure features a thermoformed, structural foam central core, coated with an Aramid fiber layer on the front side and a glass layer on the back side. This hybrid technology significantly improves membrane rigidity without raising the weight and allows long coil, distortion free bass even at high levels. This composite sandwich membrane/cone design offers an extremely rigid structure, improves power handling (300 watts RMS/600 watts Peak), and has low distortion characteristics.

NBR Surround: The FOCAL K2 Power 27KX features a long-throw NBR (Nitrile Butyl Rubber) surround for long excursion, deep bass (35-1500Hz), and added durability to promote long life.

Copper Voice Coil: The FOCAL K2 Power 27KX features an edge-wound copper 1 layer/2.55" voice coil on a Kapton former (aluminum).

High-Performance Spider: The K2 Power 27KX features a high-performance spider with integrated braids to form one complete layer. This spider configuration eliminates wire fatigue, as well as wear-and-tear on the wire.

Multi-Ferrite Magnets: The K2 Power 27KX woofer utilizes six dual-stacked Ferrite magnets (12 total) to create a powerful magnetic field to help suppress compression and give better power handling. This Multi-Ferrite motor assembly allows for greater efficiency (88db), higher power handling capabilities, and natural cooling of the woofer's voice coil.

Die Cast (Zamak) Vented Basket: The FOCAL K2 Power 27KX features a vented die-cast Zamak basket which is a rigid, non-magnetic, and non-resonant frame that provides a strong, reliable structure for the woofer. The vented basket provides a self-regulated coil cooling system which allows air to flow freely preventing heat build-up and optimized reliability and performance consistency.

Spring-Posts: The FOCAL 11" woofer is equipped with a pair of nickel-plated spring-post speaker terminals for easy connection up to 10AWG wire.

Foam Gasket: The K2 Power 27KX comes supplied with a self-adhesive foam gasket mounting-ring for better chassis damping and to prevent air leakage.

Removable Cloth Cover: The K2 Power 27KX woofer comes with a cloth cover to protect the magnet from scratches or smudging during transport, handling, and installation. The cloth cover should be removed once the woofer is installed. The cloth cover is not designed to be placed on the woofer after it has been installed.

Enclosure Compatibility

Recommended Sealed Box Volume: The FOCAL K2 Power 27KX is designed to be installed in a sealed box with a volume between 0.71 cu/ft to 1.41 cu/ft. FOCAL recommends a sealed enclosure made out of 3/4" MDF with an internal volume of 1.06 cu/ft.

Sealed Enclosure Specifications (using 3/4" MDF construction)
Internal Volume	0.71 c/ft.	1.06 cu/ft.	1.41 cu/ft.
Dimensions	Width: 16.125" Height: 11.75" Depth1: 16.125" Depth2: 7.0625"	Width: 14.9375" Height: 14.5625" Depth1: 14.5625" Depth2: 9.3125"	Width: 19.25" Height: 14.5625 Depth1: 14.5625" Depth2: 9.3125"
Bass Type	fast and tight bass	Punch and dynamic bass	Deep and articulate bass

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

Video: Introduction to Focal Car Audio

Zak Billmeier, Ken Nail

4/14/2009

Crutchfield's car audio experts Ken and Zak present an overview to 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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Reviews for the Focal K2 Power™ 27 KX

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5 out of 5

Focal K2 Power™ 27 KX

Written By RickyG, Calgary, Alberta on Tuesday, October 18, 2011

Dpek's description, above, also captures my experience with this sub. Buy a W7 if you're after more boom and SPL. Buy the Focal if you prefer detail in your music. An incredible component.

4 out of 4 people found this helpful

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1 out of 5

Cone separated

Written By Nice, Miami, FL on Saturday, February 26, 2011

The cone separated from the voice coil in 20 days and I was babying to break in. It looked like it had little glue bead. That part seemed weak. Must have been defective cause I have for over 5 years Focal K3 polykevlar 3 ways and they sound great and hold up. I returned the Focal sub for Alpine SWX.

3 out of 17 people found this helpful

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5 out of 5

Amazing Sound quality, tight and accurate

Written By Dperk, Morris, IL on Saturday, November 14, 2009

So i wanted to review these subs because reviews for them are few and far between. So i picked up a pair of these. I had a 12w6v2 in my car previous to owning these subs and i liked them, but they weren't tight enough, more of a boomy sound. Not to say they were bad quality, the JL is a great sub, but more for if you're looking for SPL rather than SQ. The Focals completely blew me away. I am amazed at how tight and accurate the bass notes are. They are not "boomy" at all, nice and punchy and very quick. These sound amazing on more genres of music than the JL did. The JL was more limited to Rap and R&B, These Focals can play ANYTHING. If you are looking at these you are obviously serious about quality bass, and i promise you, stick one or two of these in a sealed box and you will absolutely love them. My hunt for the perfect sub is over. I never seem to be content with my equipment but I think that may be over (as far as subs go). If you can afford them, you will not be dissapointed one bit. all i can say is amazing.

24 out of 30 people found this helpful

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