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Kenwood KFC-1666S

6-1/2" 2-way car speakers

Item # 1131666S

There comes a day when you just can't bear to drive another mile, listening to muddy-sounding speakers.

Read more from Crutchfield writer, Alexander H.

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About the Kenwood KFC-1666S

Dependable sound

There comes a day when you just can't bear to drive another mile, listening to muddy-sounding speakers. When you finally reach the breaking point, Kenwood's Sport Series speakers are your go-to solution without breaking the bank.

Dependable sound

There comes a day when you just can't bear to drive another mile, listening to muddy-sounding speakers. When you finally reach the breaking point, Kenwood's Sport Series speakers are your go-to solution without breaking the bank.

Solid lows and clear highs

The KFC-1666S 6-1/2" 2-way speakers feature polypropylene cones that will enrich your music with solid midbass oomph and dynamic midrange, while the 1" balanced-dome tweeters will bring new life to the high range. Kenwood also includes sharp-looking grilles in case you're doing a custom installation in your vehicle. Best of all, you can safely power these with your car stereo and still enjoy your music the way it was meant to be heard, with clarity and emotion.


Product highlights:

  • 6-1/2" 2-way speakers (pair)
  • polypropylene woofer with treated cloth surround
  • 1" PEI balanced dome tweeter
  • grilles included
  • handles up to 30 watts RMS (300 watts peak power)
  • impedance: 4 ohms
  • frequency response: 40-22,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 1-11/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # KFC-1666S

What's in the box:

  • Two 2-way speakers
  • 2 Grilles
  • Two 12" Lengths of speaker wire (each has female quick-slides on one end and bare wire on the other)
  • Eight 1" Screws
  • 8 Speed clips
  • Warranty information
  • Specifications and template on the box

Customer reviews

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Kenwood KFC-1666S Reviews

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Crutchfield response

More details on the Kenwood KFC-1666S

Features & specs

Speaker Size 6 1/2
Design 2-way
Tweeter Design 1" Balanced Dome
Impedance (Ohms) 4
Tweeter Composition PEI
Woofer Composition Polypropylene
Woofer Surround Treated cloth
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 90
Sensitivity at 2.83 volts N/A
Frequency Response 40 - 22k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 30
Peak Power Handling (Watts) 300
Top-mount Depth (Inches) 1 3/4
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 4 15/16

Product Research


Tweeters: Each speaker has a 1" PEI balanced dome tweeter. A semi-dome tweeter has a dome placed inside a cone. Balanced dome tweeters are semi-dome tweeters with equal reproduction area given the cone and dome portions of the tweeter. PEI (Poly-Ether-Imide) is a polymer film that produces a wide soundstage for superior imaging.

Mounting: The speaker basket has multiple mounting holes and is designed to fit a standard 3-hole 6-1/2" application, Ford's 4-hole 6-1/2" application, and a standard 4-hole 6-3/4" application. (When mounting in a 6-3/4" application, use a speaker baffle to seal the inner ring of screw holes.)

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Customer Q&A

10 questions already asked

Will these speakers fit my front doors on a 1996 Lincoln town car?
[ Anthony  Mar 18, 2019 ]
1 answer
I think It'll require an adapter from 9"x6" to 6"x6".
[ Isaac  Mar 18, 2019 ]
I have a 2014 dodge dart how good do you think the bass would be with these??
[ Dwayne  Mar 15, 2019 ]
7 answers
I bought these speakers for an old work car I would upgrade to a better speaker
[ Mike  Mar 19, 2019 ]
Love kenwood speakers all around these have great sound with stock deck or after would sound awsome!
[ Theress  Mar 19, 2019 ]
I would probably go with something else. The sound quality wasn't that great if wanting a lot bass.
[ Amy  Mar 19, 2019 ]
They do not have a lot of bass but they are a great full range speaker and I have been very happy with them.
[ Glenmore  Mar 19, 2019 ]
These speakers should give adequate bass response, mine went into an '04 pt cruiser and delivered good bass for a relatively small driver.
[ Kurt  Mar 19, 2019 ]
The bass is fair for a round speaker. Better then any others I have tried. However the 6x9 speakers sound alot better
[ Robert  Mar 19, 2019 ]
The bass response may be slightly improved over the factory stereo, however if you are just looking for better bass you would be better off investing in an aftermarket amplifier and sub, or aftermarket speakers and an amp.
[ Eric  Mar 15, 2019 ]
Wich will be a great tweeter for these speakers?
[ Vtecnology  Dec 25, 2018 ]
1 answer
I think the Kenwood KFC ST01 tweeters would be the best match with those. They use the same PEI material and have similar power handling so should blend well. If you have any other questions before you place an order you can chat with or call one of our Product Advisors here: --Cosmo
[ Cosmo  Jan 01, 2019 ]  Staff
Are these simple to install in a 2005 Toyota Land Cruiser?
[ David  Oct 26, 2018 ]
3 answers
Actually, David, I installed them in my Lexus, not my Land Cruiser.
[ Gavin  Oct 26, 2018 ]
I would say that if you have even a little experience doing installation, then it isn't hard. I found some YouTube videos about removing the door panel, and it was easy after that. Make sure that you observe how to put the automatic door lock mechanism back in place. Also, when testing the new speakers, be aware that if the stick tweeter isn't plugged in, the new speaker won't work.
[ Gavin  Oct 26, 2018 ]
Should be pretty easy. I installed it on my 1997 Nissan Sentra in about an hour. Then took me about a half hour to install it on my 1998 Honda Accord after the Sentra died.
[ Derick  Oct 26, 2018 ]
If i put this brand on a amplifier.. Will they hold up??
[ Big Will  Oct 02, 2018 ]
1 answer
As long as the rms power doesn't put more power than what they are rated for you'll be fine
[ daniel  Oct 02, 2018 ]
Does this come from and back as well as left and right?
[ Brett  Aug 02, 2018 ]
2 answers
Yes it does
[ Robert  Aug 08, 2018 ]
what do you mean i need a better decryption
[ Jayson  Aug 08, 2018 ]
Will these speakers fit my 2014 Volkswagen Jetta 1.8tsi without the fender audio system but with the cd changer?
[ Malik  Apr 16, 2018 ]
3 answers
I don't know mine were installed in a 2007 GMC Canyon they sound pretty good And bass seems to improve over time
[ CLIFFORD  Apr 17, 2018 ]
Not really sure what you are referring to but, the speakers are pretty universal. I would check online and see what other owners have done or get an idea of what you may run into.
[ ENRIQUE  Apr 16, 2018 ]
I used these speakers in my front doors. If you're using these for the doors, they'll fit perfectly.
[ Michael  Apr 16, 2018 ]
I see some videos that you have to use the old frame of the speaker and weld the new speakers cables there is no other plug and play option?
[ Lerolero  Apr 02, 2018 ]
2 answers
For my application on a 2000 Accord it was plug and play, the speakers fit into the stock mounts perfectly and the wires connected no problem (with the included wiring harness they gave me)
[ Danielle  Apr 02, 2018 ]
When I installed mine Crutchfield supplied the speaker mounts and connector to make the install as easy as possible. Now I don't know the type of car your installing them in or where your getting them from, but if you haven't purchased them yet I recommend
[ Robert  Apr 02, 2018 ]
Is this only one side or will it come in two?
[ Emmit  Mar 11, 2018 ]
2 answers
It's two speakers--left and right.
[ Don  Mar 12, 2018 ]
You will receive 2 speakers.....
[ JOSE  Mar 11, 2018 ]
what is the difference between the 1666s and the 1665s?
[ Dean  Feb 10, 2018 ]
1 answer
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  Feb 14, 2018 ]  Staff

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