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Kicker 40CWD84

CompD Series 8" subwoofer with dual 4-ohm voice coils

Item #: 2064CWD84

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13 Reviews

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Legendary bass, awesome price

If you're looking to add some boom to your car's sound system, Kicker's CompD 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 40CWD84 8" sub

The heavy steel basket cuts down on unwanted vibrations.

Kicker technology at work

Kicker's 40CWD84 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 dual 4-ohm voice coils make it easy to connect to a mono amplifier. This versatile sub works well in sealed or ported enclosures, and it's even suitable for free-air applications.

To drive this single subwoofer, we recommend a mono amplifier rated between 150 and 300 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 8" subwoofer with dual 4-ohm voice coils
  • injection-molded polypropylene cone
  • ribbed foam surround
  • suitable for free-air use
  • power handling: 50-200 watts RMS (100 watts per coil)
  • 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

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.

Kicker 40CWD84 Reviews

Average Customer Review:

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Kicker 40CWD84

Written By mountainman, Boulder, CO on Saturday, April 11, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Fits in stock subwoofer location with minor work on 2001 Chevy Suburban. Will be same replacement except for 03 and up where they moved the subwoofer under the center console.

Had to mount 3/4 inch piece of plywood over the stock sub box to be able to fit. Can't tell it is there when trim is replaced. It works on the stock amplifier if you wire it in parallel so the amp sees 2ohms.

Pros: Direct replacement besides plywood mounting

Cons: None so far

LS 430 Replacement

Written By Wendell K, Orlando on Monday, March 30, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Speaker seems to be an excellent subwoofer with very good build. I used it to replace a blown rear deck subwoofer in an Lexus LS430. It wasn't an exact match but I was able to make it work. It sounds very good. I'm hearing bass that was never present in my factory speaker. Crutchfield pros made this an easy transaction and provided a good value.

Pros: Great bass and excellent construction.

Cons: Not an exact fit for LS 430 subwoofer.

KICKER 8" CompD Subwoofer

Written By gatorguy, Kokomo, Indiana on Tuesday, March 24, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

My factory radio bit the dust in my 07 ram quad cab, so I bought a Kenwood kdc-bt56u to replace it. After thinking about it, I decided that now would be a good time to add a little more muscle to the system. So,I added a Kicker DXA250.1 amp and a Kicker 8" CompD Subwoofer. And let me tell you, MUSCLE IS EXACTLY WHAT I GOT! The truck already had a seven speaker Infinity amplified system that already sounded pretty good, but what a great addition this was. Because of the limited space in the truck to HIDE a sub, I chose the 8". I was able to easily install it under the backseat where a storage compartment was. Removed the cover and then made a plaster mold of the space I had. Then I fabricated a fiberglass enclosure with a MDF lid. The 8" sub drops right in. Rear of that is the amp. Pretty cool set-up! I've got me SERIOUS BUMP in my Ram now! Kind of amazing that a man over 50 would power-up his ride in such a way, but I'm glad I did. The rugged build of the sub impressed me when I took it out of the box. Heavy frame, superior coating on the metal parts and rigid terminals. I read many reviews before I made my purchase, and I have to agree with everybody that this is an awesome sub. This is also my first experience dealing with Crutchfield and I have to say they are top notch in all ways! Customer service, knowledge of products and patience with a newby in aftermarket audio. I'll definitely be a return customer! Do I recommend this product? OH YEAH !!! VERY COOL!!!

Pros: Great quality and price. Big sound from a not so big sub.

Cons: NONE

Good infinite baffle Sub

Written By Leo, California on Thursday, March 19, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Sure there are subs, and then there are subs to use in certain conditions. In my case I needed an infinite baffle type sub to mount on my rear deck. No, not all subs are designed the same as I found out...the hard way. I original bought a JL Audio 8" sub to fill the void, but instantly found out that is was not designed at all for my needs. So with reluctancy I bought the Kicker sub based on the fact it was crossed designed for both enclosed and free air type installs. Installed as expected without any complicated hole pattern problems. The dual voice coil was a nice feature, so I went ahead and wired it up for 2ohm application, paired it with my JL Audio 500 watt Mono amp and was impressed by the sound. Granted, it's not going to shake any rear view mirrors they way 2 15" would, but it does fill the car with the lows I was missing in my music. Keep in mind, it's an 8 inch sub so don't expect the thump your going to get from a 10", 12" or 15" sub. It's just not going to happen no matter how you install it.

Pros: Good for free air type installs.

Buy this??

Written By Fee from TN, Memphis,TN on Wednesday, January 21, 2015

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Just what I was looking for! Will definitely buy from you guys when I install my home theatre! Thanks??

Pros: Great quality Sound product

Cons: I didn't start shopping here sooner!!

Kicker40cwd84

Written By Luis C, California on Monday, December 29, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Solid bass 100% feedback

Pros: Eazy to install

Kicker 40CWD84

Written By George Z, Lake Charles, LA on Monday, September 15, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Very good quality, fair price, easy installation

Pros: Good bass, not boomy

Cons: None so far

great sub

Written By jason, houston on Tuesday, August 26, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

I have this sub in a chevy colorado it's plenty for this truck

Pros: Great sub all around

Cons: None

Kicker 40CWD84

Written By Anonymous, Langhorne, PA on Wednesday, April 30, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Solidly built, good sound, fair price

Kicker a good replacement for Lexus Mark Levinson sub

Written By DownieD, La Grange, NC on Tuesday, April 08, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Very good replacement for the 04 Lexus 430 Mark Levinson rear deck free air subwoofer. Simply wire the dual voice coil in series to get a closer impedance match. Not quite as loud as Levinson subwoofer, but can't beat the value. Lexus wants some $400+ for the stock replacement which is crazy when you can install this product for less than 1/4 the cost. It's a no brainer.

Pros: Great value, great sound.

Cons: Have to modify slightly to get it to fit the existing Lexus installation bracket. Not too difficult, just takes a little planning.

8" kicker

Written By Corbin B., Eustis, Florida on Tuesday, February 25, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

It was easy to install and came with all the right parts. Thinking about buying a few more iv liked it so much.

Pros: Great sound great bass.

Cons: It's only and 8".

8"kicker 40cwd84 dual 4 ohm

Written By jdzridez, yuba city ca. on Monday, October 07, 2013

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

I bought a 8"kicker 40cwd84 wired into a 8ohm load put into my lexus to replace the old woofer that ran on 16ohms the kicker works great in my ls430 great sub thankyou crutchfield

Pros: fit with ease,great design

Cons: only thing that was a pain was getting to the old sub to replace it I have a ls430 lexus with the power massage rear seats

Nice Subtle Subs

Written By QD, Downingtown, Pa on Friday, June 14, 2013

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

These are nice subs if you want some bass without taking up a lot of space. I custome fit these subs in the rear deck of my Volvo S60T. They are hooked up to a 2 channel Boston Acustics amp (80 watts per channel / low pass filter). These subs rock. Suprising bass for small subs. No box either. Just a pair of oversized baffels to help with rattle since I had to cut the opening to make it wide enough to fit the 8's. Very nice. I'm now a fan of Kicker and will outfit the rest of my car with their gear.

Pros: Nice bass for the size. Came with install gear

Cons: None that I've noticed.

Hands-on research

What's in the box?

Download owner's manual

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

Product Research

Subwoofer Features
Enclosure Compatibility

Subwoofer Features

Dual Voice Coils: For increased system flexibility, the woofer has two 4Ω voice coils. When the voice coils are wired in parallel, the woofer presents a 2Ω load. When wired in series, the woofer presents an 8Ω load.

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.

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 verify what’s in the box, 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.

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