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Kicker 40CWS84

CompS Series 8" 4-ohm subwoofer

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Our take on the Kicker 40CWS84

by John Pollard
Kicker

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.

Legendary bass, awesome price

If you're looking to add some boom to your car's sound system, Kicker's CompS line will get your car shaking without draining your wallet. These subs are the latest in the legendary Kicker Comp line that started in 1986, with a proven pedigree when it comes to delivering powerful bass.

Side-view of Kicker 40CWS84 8" sub

The heavy steel basket cuts down on unwanted vibrations.

Kicker technology at work

Kicker's 40CWS84 8" subwoofer features a flex-resistant polypropylene cone for hard-hitting lows without distortion, while the ribbed foam surround promotes long excursion and helps to keep the cone on target. The sub's steel basket provides a reliable foundation for big bass, and its extensive venting ensures long-lasting performance that won't break down when the bass gets heavy.

Easy to add to nearly any setup

This sub handles up to 200 watts RMS to bring out the depth your music's been missing, and its 4-ohm impedance makes it compatible with just about every amplifier on the market. This versatile sub works well in sealed or ported enclosures, and it's even suitable for free-air applications.

See more info on this item

Highlights:

  • 8" 4-ohm subwoofer
  • injection-molded polypropylene cone
  • ribbed foam surround
  • suitable for free-air use
  • power handling: 50-200 watts RMS
  • peak power handling: 400 watts
  • frequency response: 30-500 Hz
  • sensitivity: 85.6 dB
  • top-mount depth: 3-7/8"
  • sealed box volume: 0.50 - 1.20 cu. ft.
  • ported box volume: 0.66 - 1.20 cu. ft.
  • warranty: 1 year
  • Our 60-day money-back guarantee

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

Features and Specs
Size
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8 -inch
Impedance
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4 ohms
Cone Material
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Polypropylene
Surround Material
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Polyurethane
Ideal Sealed Box Volume (cubic feet)
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N/A
Ideal Ported Box Volume (cubic feet)
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N/A
Port diameter (inches)
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N/A
Port length (inches)
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N/A
Free-Air
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Yes
Dual Voice Coil
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No
Sensitivity
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85.6 dB at 1 watt
Frequency Response
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30 - 500 Hz
RMS Power Range (Watts)
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50-200
Peak Power Handling (Watts)
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400
Top Mount Depth (inches)
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3 7/8
Bottom Mount Depth (inches)
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N/A
Cutout Diameter or Length (inches)
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6 15/16
Vas (liters)
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18.54
Fs (Hz)
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40
Qts
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0.54
Xmax (millimeters)
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0
Parts Warranty
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1 Year
Labor Warranty
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1 Year
Product Research
What's in the box?

Download owner's manual

  • One 8" Single 4-ohm voice coil subwoofer
  • Four 0.25" Crimp on quick slide terminals
  • Owner's manual
  • 2 Kicker decals
  • Template on box

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.

Subwoofer Features
Enclosure Compatibility

Subwoofer Features

Ribbed Surround: The optimized ribbed polyurethane helps eliminate flex and distortion.

Spiralead Tinsel Leads: The durable Spiralead tinsel leads are woven into the woofer's spider, for added strength and reliability.

Steel Basket with Vented Pole Piece: The steel basket's vented pole piece and Kicker's Quad Venting slots contribute to the woofers' efficient cooling and durability.

Speaker Terminals: Each speaker terminal has two 0.25" push-on terminals (crimp-on quick slides included).

Enclosure Compatibility

Enclosure Versatility: The Kicker Comp subwoofer is versatile, performing well in vented or sealed enclosures, and in free-air applications.

Sealed Enclosures: A sealed enclosure design offers the smoothest response, with increased energy at the lowest frequencies (between 20 to 30 Hz).

  • Minimum enclosure volume: 0.5 ft³
  • Maximum enclosure volume: 1.2 ft³

Ported Enclosures: A ported (vented) enclosure design is typically more efficient than a sealed enclosure.

  • Minimum enclosure volume: 0.66 ft³ with a 1.5" x 8" slot port opening that is 18" deep
  • Maximum enclosure volume: 1.2 ft³ with a 1.5" x 8" slot port opening that is 12.25" deep

Infinite Baffle Mounting: The Kicker Comp subwoofers are also designed to be used as free-air drivers. The infinite baffle mounting method effectively utilizes the trunk of a sedan as the enclosure.

 

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

Video: Kicker Yellow Series Car Audio Gear

Video: Kicker Yellow Series Car Audio Gear

by Zak Billmeier
 
Video: Kicker Yellow Series Car Audio Gear

Kicker's Yellow Series of amps, speakers and subs gives you the performance you expect from Kicker at a more affordable price. And this year's models are better than ever.

 
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Kicker 40CWS84 Reviews

Average Customer Review:

11 people say:

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Filter by rating:
4 out of 5

Specialty Install

Written By B, Crawfordsville, IN on Saturday, July 05, 2014
Crutchfield Customer Review (What's this?)
 
Installed sub in 1978 Corvette 3 compartment Door. Intended to round out the sound from my 6x9's and 4x6's. I needed to add some low end while maintaining my storage for my t-tops. This sub worked great, I fabricated a door and installed the sub in a free air configuration. I am planning to build a small sealed enclosure to improve sound. Powered by a Sound Stream SDI1.700 steath amp at 250 watts @ 4 ohms I am impressed with the result. It will sound tighter in the sealed enclosure, that said the mid bass is nice and the sub will go lower than I had thought. It is an 8 so don't expect it to break your windsheild, and don't complain about the power handling either, spend 300 on a JL 8inch sub if you want more from an 8.
Pros:
American made, Kicker quality & sound, small & discrete perfect for my application
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4 out of 5

great little sub

Written By ajef7885, Illinois on Saturday, June 21, 2014
Crutchfield Customer Review (What's this?)
 
I installed this in a free air application in the back deck of my Ford Focus sedan. I just needed some bass reinforcement for the 6x8 and 5-1/4 Kickers in the doors. It works great for the music I listen to( 70's 80's hard/classic rock). I didn't expect it to rattle the windows but it does have a pretty good low end extension. Powered by a 200 watt (bridged) Sound Ordnance amp. My Pioneer head unit is set to 125hz low pass and 100hz high pass (to the door speakers). This makes a nice flow between the sub and the doors. I am very impressed with the performance. It does more than I thought an 8" sub would.
Pros:
small, free air capable, solid build
Cons:
needs to include Kicker grille to cover it.
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4 out of 5

8 inch sub

Written By jay, phoenix, az on Monday, April 14, 2014
Crutchfield Customer Review (What's this?)
 
great sound but cant handle much power without distortion
Pros:
easy to install out of the box
Cons:
distortion... :( BUT not bad for the price and size
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5 out of 5

Kicker 40CWS84

Written By Anonymous, terry,Mississippi on Monday, March 24, 2014
Crutchfield Customer Review (What's this?)
 
Sounds good easy to hook up.
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4 out of 5

Good sound

Written By BigRob, NYC on Saturday, November 23, 2013
Crutchfield Customer Review (What's this?)
 
Good speaker for a small or compact car. I purchased this peaker thinking it would fill up my 2012 300. Not enough bump. Still, it's a good speaker. I'm actually holding on to it. My wife has a 08 Jetta in which Ill try putting it there. Can't beat the price I got it at, that's why I'd rather hold it and use it for another vehicle. Might not find it at the price I got it at.
Pros:
Beautifully structured
Cons:
Not good for big cars
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5 out of 5

Nice Sub

Written By Kirochan, Okinawa on Friday, September 27, 2013
Crutchfield Customer Review (What's this?)
 
I got this to put in the back lid of my Camry. I cut out some MDF, made holes in it for the 6X9 and sub, and replace the factory back lid. It is running in a free air application and it can shake my car!!! I am shocked that it can do that for such a little thing. I plan on later buying another one and putting them both in a box. I cant wait to hear what they sound like in a box.
Pros:
ease of use, good price, and does more than what it needs to.
Cons:
none
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3 out of 5

Good enough replacement

Written By carlos, Hayward, CA on Wednesday, August 21, 2013
Crutchfield Customer Review (What's this?)
 
My Polk 8DB40 blew pre-maturely and this was suggested as good replacement. Sound wise, it's pretty much the same but I learned my lesson and back out the gain on my amp.
Pros:
Price, installation...
Cons:
Dunno if it can go down deep...
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3 out of 5

8 inch Kicker subwoofer

Written By Ward, Warner Robins,Georgia on Sunday, August 04, 2013
Crutchfield Customer Review (What's this?)
 
The 8 inch Kicker sub works ok for its size,but not much base.Its mounted on the back deck of my 07 Hemi Charger.Since its not mounted in an enclose it did not produce much bass.
Pros:
Medium bass for its size
Cons:
Not much bass for the money.
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4 out of 5

New life

Written By Anonymous, Ukiah, CA on Sunday, May 12, 2013
Crutchfield Customer Review (What's this?)
 
Gives new life to the Jbl system in our Toyota Avalon
Pros:
Clear sound
Cons:
Needs a stronger sub amp, stock amp taxed
1 out of 1 people found this helpful
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5 out of 5

Kicker free air

Written By King kicker, Fontana ca on Sunday, March 24, 2013
Crutchfield Customer Review (What's this?)
 
Good sub to reconment
Pros:
Good price for a kicker
Cons:
Need more sound quality
1 out of 3 people found this helpful
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5 out of 5

Awesome

Written By vans_wearer, Lawton, ok on Saturday, March 23, 2013
Crutchfield Customer Review (What's this?)
 
This sub kicks especially for the small sub it is, sounds crystal clear
Pros:
Small, compact, great sound
Cons:
None
3 out of 3 people found this helpful
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Add accessories for the Kicker 40CWS84

We've verified that these enclosures are a good match for this subwoofer. See all categories & accessories

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Polyester Fiber Stuffing Make your subwoofer think it's in a bigger box (1-pound pack)
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Metra Speaker Terminal Round terminal cup with binding post connectors (for do-it-yourself box builders)
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Metra Speaker Terminal Square terminal cup with spring clip connectors (for do-it-yourself box builders)
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Grille Clamps (Front/top mount clamps)
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Speaker Grilles (8" waffle style)
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Autosound 2000 Disc One Low Frequency Test CD (Disc One)
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For a more in-depth review and enhanced detailed information on the Kicker 40CWS84, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_2064CWS84/Kicker-40CWS84.html ).