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Kicker 40CWRT82

CompRT shallow-mount 8" subwoofer with dual 2-ohm voice coils

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Our take on the Kicker 40CWRT82

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.

A thin sub with big sub bass

If you're looking for bass for a tight space, Kicker designed their CompRT subs with compact cars, pickup trucks, and even motorcycles in mind. The low-profile 40CWRT82 8” subwoofer performs just like a full-size sub, but without killing all your cargo space. This high-performance CompRT sub stands less than 3" tall, so your installation options are wide open.

Kicker 40CWRT82

This sub clocks in at less than 3" deep.

Read more

Built with boom in mind

The 40CWRT82 comes equipped with a rigid injection-molded polypropylene cone that won't flex and cause distortion while you're cranking the bass. Its rubber surround will last through years of heavy use, combining with a special-design back and top plate to give you more excursion (which equals more bass) than other skinny subs.   

Made to work with many systems

This sub handles up to 400 watts RMS so make sure you've got a solid amp to power it. You can wire the dual voice coils for either 4- or 1-ohm total impedance, giving you more wiring options when setting up your system. This versatile sub sounds great in sealed or ported enclosures.

Important Note: If you are wiring this DVC sub for low impedance, make sure that your amp is compatible. You can damage or destroy your amp by exceeding recommended minimum impedance.

To drive this single subwoofer, we recommend a mono amplifier rated between 300 and 600 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Highlights:

  • 8" subwoofer with dual 2-ohm voice coils
  • injection-molded polypropylene cone
  • rubber surround
  • power handling: 100-400 watts RMS (200 watts per coil)
  • peak power handling: 800 watts
  • frequency response: 30-500 Hz
  • sensitivity: 84.8 dB
  • top-mount depth: 2-5/8"
  • sealed box volume: .20 - 1.25 cu. ft.
  • ported box volume: 1.25 - 1.75 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 8 -inch
Impedance 2 ohms
Cone Material Injection Molded Poly
Surround Material Santoprene
Ideal Sealed Box Volume (cubic feet) N/A
Ideal Ported Box Volume (cubic feet) N/A
Port diameter (inches) N/A
Port length (inches) N/A
Free-Air No
Dual Voice Coil Yes
Sensitivity 84.8 dB at 1 watt
Frequency Response 30 - 500 Hz
RMS Power Range (Watts) 100-400
Peak Power Handling (Watts) 800
Top Mount Depth (inches) 2 5/8
Bottom Mount Depth (inches) N/A
Cutout Diameter or Length (inches) 6 7/8
Vas (liters) 10.32
Fs (Hz) 49.2
Qts 0.565
Xmax (millimeters) 0
Parts Warranty 1 Year
Labor Warranty 1 Year
Product Research
What's in the box?

Download owner's manual

  • One 8" Dual 2-ohm voice coil subwoofer
  • Kicker logo stickers
  • Manual (English/ Spanish/ German/ French)
  • 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.

Features

Dual 2-ohm Voice Coils: This woofer features dual 2-ohm voice coils, offering wiring flexibility. When the voice coils are wired in parallel the woofer presents a 1-ohm load. When the voice coils are wired in series the woofer presents a 4-ohm load.

Tinsel Leads: CompRT subwoofers use Spiralead tinsel-lead technology; the tinsel lead wires are woven into the spider to relieve mechanical stress.

Enclosure Compatibility

Shallow-Mount: Kicker's CompRT series is designed to minimize depth, giving you subwoofer options where standard enclosures don't fit. The vent-less, solid-pole design allows the woofer to be mounted directly against the rear wall of a sealed enclosure.

Sealed Enclosure Applications: Sealed enclosures provide the most control over a woofer and provide accurate sonic reproduction, making them suitable to all types of music. Kicker recommends sealed enclosures in the following range:

  • Minimum Enclosure Volume: 0.2 ft³
  • Maximum Enclosure Volume: 1.25 ft³

Vented Box: Vented (or ported) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power. Kicker recommends ported enclosures in the following range:

  • Minimum Enclosure Volume: 0.8 ft³ with a 8" x 1.5" x 20.75" slot port
  • Maximum Enclosure Volume: 1.20 ft³ with a 8" x 2" x 19.125" slot port

Note: Although smaller than optimal, the prefabricated ported enclosures we list on the accessory page produce very good results.

 
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Kicker 40CWRT82 Reviews

Average Customer Review:

6 people say:

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Filter by rating:
4 out of 5

Different Kind of Bass

Written By Craig, Arizona on Thursday, May 29, 2014
Crutchfield Customer Review (What's this?)
 
Be careful what enclosure you use. I wouldn't use anything smaller than 1.5 cubic foot sub box for more air flow (capacity). I tried it with a sealed .5 cubic foot and it sounded like someone was hitting the wood with a mallet. I was terrible and I'm positive that it was because the box was too small. I was never able to try it in another box, but it should sound a heck of a lot better in a larger one. To me, why make a shallow sub if you can't put it in a very shallow box? I guess their definition of 'shallow' is different than mine. Oh well.

Otherwise, it sounds clean and is very loud @ 1 ohm w/ 400w. I would still recommend it if you can find a good enclosure for it.

P.S. I also tested it @ 4ohms w/ 150w. No change in sound quality, just not as loud. And all this goes with it wired normal and reverse.
Pros:
Looks good. Loud Clean Bass.
Cons:
Research an enclosure before you buy. You may want to download the manual first to get the proper specs to find a good box.
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4 out of 5

Kicker 40CWRT82

Written By phillB, usa on Friday, May 02, 2014
Crutchfield Customer Review (What's this?)
 
A very shallow sub that can produce big sound. Is capable of handling a lot of power, and it sounds bigger than an 8"
Pros:
Shallow and small box ready
Cons:
Made more for low watt applications
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5 out of 5

awesome sub

Written By JoshM, Atlanta, GA on Friday, March 28, 2014
Crutchfield Customer Review (What's this?)
 
Installed in the factory enclosure in my 2006 F150. I'm pushing with a pioneer head unit and the factory amp. It could use a little more power but it sounds great now. I'll certainly recommend this sub.
Pros:
easy install, great bass, looks good
Cons:
none
1 out of 1 people found this helpful
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5 out of 5

Kicker 40CWRT82

Written By scott123, spring hill, florida on Saturday, February 15, 2014
Crutchfield Customer Review (What's this?)
 
very nice direct replacement for my Hyundai factory sub had to do a littlr heat gun to the plastic existing box but all in all perfect fit
Pros:
all
Cons:
non as far as i'm concerned
2 out of 2 people found this helpful
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5 out of 5

Comp rt8

Written By Oso187, Orlando on Monday, January 20, 2014
 
Awesome sub for a 8 inch it hits hard definitely worth buying
Pros:
Small compact and hits hard
Cons:
Non
3 out of 3 people found this helpful
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5 out of 5

Gets the job done

Written By Dan, Wyckoff, NJ on Thursday, October 31, 2013
Crutchfield Customer Review (What's this?)
 
Does what its supposed to do. Makes bass sounds. Pretty musical to boot!

Had to fit something in a 4 door pickup, which is of course notorious for having limited space. Built a box, and installed this thing. I connected it at 1 ohm, and it sounds fine. Its not going to win any SPL competitions, but it does add to the low end for sure.
Pros:
Very small and shallow. Sounds nice, very musical. Its pretty fast on transients. Really nice build quality
Cons:
None really....
3 out of 3 people found this helpful
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3 questions already asked

Will this sub fit in the 2014 mustang GT Premium stock door sub locations? Is there any other modifications required? [ Slowburn  Aug 10, 2014 ]
1 answer
  • For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy Staff  Aug 11, 2014 ]
I'm looking for a sub that will fit in a .1 cubic foot box for my Fiero, will this work? [ Nathan  Apr 21, 2014 ]
3 answers
  • The spec for this sub is a minimum of 0.2 cubic feet sealed. I looked everywhere for about 2 weeks and this sub was the ONLY one that I could find that would meet my requirements. I just purchased one for my Honda Ridgeline and had to make a custom box out of MDF. I came in around 0.22 cubic feet after displacement and it sounds great. I made a trapezoidal box that measured 2-1/4" at the top and 4-1/4" at the bottom. Width was 19" and the height was 11-1/2". I used 1/2" MDF which Kicker says is allowable for 8" and smaller subs. [ james   Apr 23, 2014 ]
  • I don't believe so. The specs say .20 is the smallest and I used .6 so no way of telling. I don't think that would be enough air [ Phillip   Apr 22, 2014 ]
  • I read that the minimum volume for this sub is .2 cubic feet, but I was wondering what the consequences of installing it in a smaller box would be and if it would be worth buying one [ Nathan   Apr 21, 2014 ]
Can anyone tell me the dimension between the top mounting surface and the top of the rubber surround cone? I am basically looking for for the total depth that the sub woofer will stick out of the box when mounted. Also, If I can get a dimension at the back side of the sub woofer (diameter at the magnet), that would be helpful also. [ james  Apr 03, 2014 ]
1 answer
  • hello sorry, i have already returned this sub as it didn't work out for me. [ JIAN   Apr 04, 2014 ]

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For a more in-depth review and enhanced detailed information on the Kicker 40CWRT82, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_2064CWRT82/Kicker-40CWRT82.html ).