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Kicker 40CS684

6"x8" 2-way car speakers

258 Reviews | 4 questions - 10 answers

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Item # 2064CS684

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Overview

Our take on the Kicker 40CS684

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 40CS684

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.  

Built tough

Kicker's 40CS684 speaker set provides low-end from a tough 6"x8" polypropylene woofer, with a polyester foam surround that will stay strong for years to come. The 1/2" PEI balanced dome tweeter takes care of the vocal and instrumental details that'll really bring your music to life. These speakers sound great powered by a factory radio or an aftermarket car stereo, and they'll really rock when connected to an external amplifier.

These speakers topped it off with the front speakers just the right amount of sound and bass behind me.

Tim, Lovelock, NV

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What's in the Box:

  • 2 Coaxial speakers
  • Two 11" lengths of speaker wire (tinned wire on one end and 0.205" + 0.110" female quick slides on the other)
  • 4 Red plastic butt connectors
  • Eight 1" Self-tapping screws
  • 8 Speed clips
  • Owner's manual (English/ Spanish/ German/ French)

Product Highlights:

  • 2-way 6"x8" speakers (pair)
  • polypropylene woofer cone with polyester foam surround
  • 1/2" PEI balanced dome tweeter
  • power range: 2-75 watts RMS (225 watts peak power)
  • frequency response: 45-20,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 2-5/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee
Reviews

Kicker 40CS684 Reviews

Average Customer Review(s):

(258 Reviews)
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Details

Hands-on research

Features and Specs

General
Speaker Size 6X8
Design 2-way
Tweeter Design 1/2" Balanced Dome
Tweeter Composition PEI
Woofer Composition Polypropylene
Woofer Surround Polyester Foam
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) 90
Sensitivity at 2.83 volts N/A
Frequency Response 45 - 20k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 75
Peak Power Handling (Watts) 225
Impedance (Ohms) 4
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) 2 11/16
Cutout Diameter or Length (inches) 0

Product Research

Features

Polypropylene Woofer Cones: The Kicker CS-series speakers feature durable polypropylene woofer cones, resistant to 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.

1/2" PEI Balanced-dome Tweeters: The 1/2" PEI (polyetherimide) balanced-dome tweeters provide a smooth high frequency response with quick, detailed and spatially-correct imaging. The tweeters have strong neodymium magnets for higher power handling.

Mounting Applications: While Kicker describes this speaker as a 6x8, it also fits many 5x7 applications. Please check the Crutchfield Vehicle Selector to confirm fit.

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.

Accessories
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

4 questions already asked

I Don't have an amp for mine yet , but they sound great still! [ David  Dec 30, 2016 ]
No. However it never hurts to have more power. Especially clean power like you would get from a separate amp. [ Paul  Dec 30, 2016 ]
no [ John R. de la  Apr 12, 2016 ]
think they swivel. If you're looking for more precise imaging than maybe separates would be a better fit. I installed Kicker separates in the front and these speakers for the rear. I am very pleased with the results. These speakers take a beating and keep coming back for more. [ Brian  Apr 12, 2016 ]
yes slightly [ MANUEL  Apr 12, 2016 ]
My son has had good luck with the Kicker's. The sound quality is good, bass is about the same if you are looking for more bass you might need to add an sub, but he likes them and they have good sound. These were installed in a pick-up truck if that helps. [ GLORIA A  Aug 26, 2015 ]
I installed the Kicker 40CS684 speakers with the Bazooka 8 inch powered sub. The combination is AWESOME - especially for the price! [ ROBERT S  Aug 26, 2015 ]
I like the kicker speakers. Had them now about a year still sound great. [ GARY F  Aug 26, 2015 ]
For one buy the foams enclosures that crutchfield offers for these speakers they make the speakers sound very crisp and responsive to any type of music any fit into tight apps other than that maybe a small amp to peak this speakers performance [ JOHN  Aug 26, 2015 ]
Thanks for your question. For information on selecting the best amp 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 between the amp models and help you make the best choice for your system. [ Krissy  Sep 08, 2014 ]  Staff
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