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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 40CWRT122 12” subwoofer performs just like a full-size sub, but without killing all your cargo space. This high-performance CompRT sub stands less than 4" tall, so your installation options are wide open.

Kicker 40CWRT122

This sub clocks in at less than 4" deep.

Built with boom in mind

The 40CWRT122 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 800 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.

Product Highlights:

  • 12" subwoofer with dual 2-ohm voice coils
  • injection-molded polypropylene cone
  • rubber surround
  • power handling: 100-800 watts RMS (400 watts per coil)
  • peak power handling: 1600 watts
  • frequency response: 25-500 Hz
  • sensitivity: 87.1 dB
  • top-mount depth: 3-3/4"
  • sealed box volume: .55 - 3.0 cu. ft.
  • ported box volume: 1.75 - 2.25 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 40CWRT122 Reviews

Average Customer Review:

4 Reviews


Written by: Jo from Thibodaux on September 11, 2013

Crutchfield Customer Review (What's this?)

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

I have them mounted in a custom truck box for a 03 dodge ram under the back seat. They're powered by a Kicker zxs1500.1 amplifier and they make my truck rattle like crazy. I would definitely recommend these to anyone else.

Pros: Shallow mount space savers

Cons: None so far

Love it.

Written by: PMH from Lower Arkansas on August 12, 2013

Crutchfield Customer Review (What's this?)

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

I don't have a lot of experience with subs, but this one seems like it is really doing its job. I'm running it through an Alpine MRV-M500. The sub is in an enclosure about 1.7 cubic feet, partially filled with polyfill. I think the sub could use a little more power, I can't get the sound just right (the MRV-M500 has too many controls on it, and none of them seem to do much of anything). Either way, I'm working to harness the sub's full potential. I got a big discount by purchasing scratch and dent, I couldn't find any damage, cosmetic or otherwise.

Pros: Hits hard for a shallow-mount sub.

Cons: Aim for the higher end of the power requirements.


Written by: Jonathan from Orlando on May 22, 2013

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

This is an updated review to my previous post. Currently i have realized these are not 1 OHM stable subs and can not handle 750RMS. The coils separate, I have run these in two different wiring and amp options and both times the subs fail with in a week. Currently i have changed the entire set up and am running both subs at 4 OHM bridged to 2 OHM on the amp at 475 RMS to each sub. Hopefully this will work better than actually running the Subs at what they claim they can handle. I will update this if they fail at 2 OHM

Pros: Great sound for shallow mount subs

Cons: Power handling is not rated correctly

love tuese subs

Written by: jonathan from orlando, fl on May 3, 2013

Crutchfield Customer Review (What's this?)

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

I first bought pioneer sw3001 which i have nothing bad to say about they were great, but i wanted more.. After a lot of research it was a toss up between these and the alpine. There were no reviews on this sub and i took a chance on the kicker name. Boy am i happy, right out of the box i matched them up against the alpine and you notice the difference! So all in all over $150 cheaper, more rms and personally a better thump i have to say those who hear what i have running are now scratching their heads.



Hands-on research

What's in the box?

Download owner's manual

  • One 12" Dual 2-ohm voice coil subwoofer
  • Kicker logo stickers
  • Manual (English/ Spanish/ German/ French)
  • Template on box

Product Research


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: 0.55 ft³
  • Maximum Enclosure Volume: 3.0 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: 1.75 ft³ with a 12.5" x 2.5" x 20" slot port
  • Maximum Enclosure Volume: 2.25 ft³ with a 12.5" x 3" x 20.5" slot port

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.