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Kicker 40CSS674

6-3/4" component speaker system

55 Reviews | 8 questions - 14 answers

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Our take on the Kicker 40CSS674

Upgrading the old factory speakers in your car will give you a huge bump in sound quality, and Kicker designed CS Series speakers to get your sound system rockin' without breaking the bank. You'll enjoy your music even more when you hear all the details that your muddy-sounding factory speakers couldn't begin to reproduce.  

Kicker 40CSS674

It's time for an upgrade

Upgrading the old factory speakers in your car will give you a huge bump in sound quality, and Kicker designed CS Series speakers to get your sound system rockin' without breaking the bank. You'll enjoy your music even more when you hear all the details that your muddy-sounding factory speakers couldn't begin to reproduce.  

Bring on the treble and the bass

Kicker's 40CSS674 component speaker set provides low-end from a tough 6-3/4" polypropylene woofer, with a polyester foam surround that will stay strong for years to come. The separate 3/4" titanium dome tweeter takes care of the vocal and instrumental details that'll really bring your music to life. The outboard crossover network allows you to pick from three different tweeter level settings so you'll get balanced sound wherever you're sitting. Grilles are included.

Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.

Awesome sound. A major step up from the factory speakers.

Jeremiah, South Carolina

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What's in the Box:

  • Two woofers
  • 2 Woofer grilles
  • Two tweeters (each with 35" Wire attached)
  • 2 Crossovers (each with 35" Input wire/ 35" Tweeter output wire/ 35" Woofer output wire attached)
  • 2 Flush mount tweeter rings
  • 2 Short tweeter mounting nuts
  • 2 Long tweeter mounting nuts
  • 2 Back angled tweeter rings
  • 2 Front angled tweeter rings
  • 2 Angled surface mount tweeter housings
  • Twelve 1" Self-tapping screws
  • Two 5/8" Self-tapping screws
  • 8 Speed clips
  • Four 7" Zip-ties
  • 4 Red plastic butt connectors
  • Owner's manual (English/ Spanish/ German/ French)

Product Highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 crossovers
  • 6-3/4" polypropylene woofers with polyester foam surrounds
  • 3/4" titanium dome tweeters
  • external crossover network with 3 tweeter levels (0, +3, +6 dB)
  • power range: 2-100 watts RMS (300 watts peak power)
  • frequency response: 35-21,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 1-7/8"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Kicker 40CSS674 Reviews

Average Customer Review(s):

(55 Reviews)
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Hands-on research

Features and Specs

Speaker Size 6 3/4
Design 2-way
Tweeter Design 3/4" Dome
Tweeter Composition Titanium
Woofer Composition Polypropylene
Woofer Surround Polyester Foam
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 90
Sensitivity at 2.83 volts N/A
Frequency Response 35 - 21k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 100
Peak Power Handling (Watts) 300
Impedance (Ohms) 4
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) 2 1/16
Cutout Diameter or Length (inches) 5 9/16

Product Research


Polypropylene Woofer Cones: The Kicker CS-series speakers feature durable polypropylene woofer cones, resistant to the moisture and temperature extremes found in automotive applications.

Ribbed Polyester Foam Surrounds: The ribbed polyester foam surrounds allow extended cone excursion for additional bass output and higher SPL.

Tweeter Mounting Options: The tweeters come with brackets to allow multiple mounting configurations: flush-mounted, angled flush-mounted (approximately 10°), and angled surface-mounted (approximately 15°).

Tweeter Dimensions:

  Flush Mount Angled Flush Mount Angled Surface Mount
Mounting Height 0.238" 0.563" 1.272"
Depth 0.532" 0.612" 0.554" (screw depth)
Frame Diameter 1.976" 1.976" N/A
Cutout Diameter 1.57" 1.587" N/A
Frame Width N/A N/A 1.688"
Frame Length N/A N/A 1.897"

Crossovers: The component system includes passive 2-way crossover networks for a seamless transition between the woofers and tweeters. The slope is 12dB per octave (both high pass and low pass) and the crossover point is 4000 Hz. A switch on each crossover allows you to set the tweeter output; 0 dB, +3 dB, or +6 dB. The crossovers' input and output wires are attached; the woofer output has quick slide terminals that connect directly to the woofer and the tweeter output has bullet terminals that mate to the terminals on the tweeter wires. The crossovers' dimensions are:

  • Length: 4.595"
  • Width: 2.463"
  • Height: 1.004"

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.

Staff Reviews

Product reviews from the Crutchfield Labs

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

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I like kicker [ Steven Frederic  May 06, 2017 ]
Sound extremely good! [ CHRISTOPHER LEE  Dec 17, 2016 ]
great sound!!! [ Stepan  Dec 15, 2016 ]
ratings [ Mark  Nov 19, 2016 ]
The customer reviews were excellent and the specs looked great too. I can't wait to get them installed! [ James  Nov 11, 2016 ]
Power handling and a rich sound [ Travis  Aug 27, 2016 ]
They were rated 5 star and I have used Kicker products before. [ Shawn  Aug 07, 2016 ]
Kicker has good quality. Plus my rear speakers r kickers. Want everything to match [ Richard  Jun 26, 2016 ]
quality replacement that fits my vehicle without any modification and can handle up to 100W RMS [ HILBURN  Jun 13, 2016 ]
Based on recommendation from Crutchfield, these would offer a nice upgrade from the factory installed speakers. [ ERIK  Jun 06, 2016 ]
based mostly from ratings and reviews [ Phillip  Dec 25, 2015 ]

8 questions already asked

For additional 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 how everything fits and what you will need for an installation in your vehicle. [ Kenny  Nov 15, 2016 ]  Staff
NO,we did not install an amp. There's 3 settings on the crossover we started on the highest and found it was too much treble. Ultimately we settled on the lowest setting. The speakers certainly could handle more power, but we didn't want to get that involved or spend more money on an auxiliary amp. [ Brilliant Light  Oct 27, 2016 ]
I was persuaded to purchase an amp because the sound would be much better and alive. It is true....big difference with the amp [ Martin  Oct 27, 2016 ]
No you don't need to run an amp but it would sound better if you did. [ BRANDE  Oct 26, 2016 ]
I used a Rockford amp pushing them as well as some polks in the rear. they worked well for me and I have no issues with them. [ KEITH BRIAN  Sep 10, 2016 ]
Tweets require little power too be loud.... I ran my tweets straight to the head unit... Speakers to amp... Not sure if this is right but it sounds fine.... but I never have ran tweets to amp.... I am running two sets in a Hummer... [ james  Apr 13, 2016 ]
next to the Flux capacity. Duh. [ Harlan  Aug 31, 2015 ]
The tweeter mounts inside the end of the exhaust. This is the ideal location because it seconds as a baffle for the exhaust. The reduction of exhaust noise with the added accoustics of having it mounted inside of a metal tube will create the ultimate listening experience. The only other logical solution is to Velcro the tweeter to your forehead. Doing so will ensure the sound is directed Forward and then you will drive into the sound. [ BLACKFLY  Aug 25, 2015 ]
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Krissy  Nov 18, 2014 ]  Staff
A ton... Factory speakers are crap... These speakers are great.... Great buy.... [ james  Apr 13, 2016 ]
My 2000 blazer was night and day but I they were 12 year old speakers I like the mids and highs the kicker components give and with the right songs my mirrors shake without a sub [ JAMES D  Dec 26, 2013 ]
Also depends a lot on your amp. I have 7 these speakers need a good amp to really go [ MICHAEL  Dec 26, 2013 ]
If you have a good spot for your tweeters (upper dash) these will blow up factory system away. But again look at you frequency range. These won't go as low as your factory speakers. They're louder, cleaner, and plays better mid bass. To really complete your system. Run a set of these and a sub. Or in my case 2 sets of these and two l7 [ MICHAEL  Dec 26, 2013 ]
This package contains two woofers, two tweeters, and two crossovers. Feel free to reach out to an Advisor by phone or chat for advise on which speaker set will be best for your vehicle. [ Jeff  Nov 25, 2013 ]  Staff