Kenwood KFC-1666S
Sport Series 6-1/2" 2-way car speakers
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Kenwood KFC-1666S | Sport Series 6.5" 2-Way Coaxial Speakers
The Kenwood KFC-1666S is a highly popular entry-level 6.5" coaxial speaker designed primarily as an affordable factory replacement. As part of Kenwood's Sport Series, these speakers are engineered to deliver clear, bright sound even when powered by a basic factory radio. Their shallow-mount design makes them a versatile fit for the vast majority of vehicles on the road today.
Product Highlights
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Shallow-Mount Design: With a mounting depth of only 1-11/16", these are some of the easiest speakers to install, fitting into tight door panels where deeper speakers might hit window tracks.
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Sound Field Enhancer: Features a specialized tweeter bezel that helps disperse high frequencies more broadly, improving the soundstage if your speakers are mounted low in the doors.
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High Efficiency: A high sensitivity rating of 90 dB means they play loud and clear without needing an external amplifier, extracting the most out of your factory head unit.
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Polypropylene Woofer: The silver-colored PP cone is durable and moisture-resistant, providing a solid midrange that won't degrade over time like original paper factory speakers.
Key Features
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1" Balanced Dome Tweeter: Uses a PEI (Polyetherimide) diaphragm to produce crisp, detailed highs that cut through road noise.
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Cloth Surround: Provides a lightweight and flexible suspension for the woofer, ensuring smooth movement and reliable performance over the life of the speaker.
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Ferrite Magnet Structure: A heavy-duty magnet assembly ensures stable power handling and consistent acoustic output.
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Universal Fit: The 6.5" (160mm) frame is designed to match most standard factory bolt patterns, making it a "go-to" for DIY installations.
Technical Specifications
| Feature | Specification |
| Speaker Size | 6.5 in (160 mm) |
| Design | 2-Way Coaxial |
| Power Handling (RMS) | 30 Watts |
| Power Handling (Peak) | 300 Watts |
| Frequency Response | 40 Hz – 22,000 Hz |
| Sensitivity | 90 dB |
| Impedance | 4-Ohm |
| Mounting Depth | 1-11/16 in (43.2 mm) |
What’s In The Box?
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(2) Kenwood KFC-1666S 6.5" Speakers
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(2) Grille Assemblies
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(2) 12" Lengths of speaker wire
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(8) 1" Self-tapping screws
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(8) Speed nuts
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Warranty card and mounting template
What Others Are Saying
Eddie was great - SDCS installed a new head unit in my 2019 4Runner. He was honest in his opinions regarding the options I was considering. Pricing was also good - he was able to reuse some of my existing installation kit so I saved a bit of $$.Installation was clean and fast and he took the time to walk through the features before I left. Highly recommend!!
I had a great time at this shop! The staff really knows their stuff and took the time to explain the different options without pressure. Installation was quick, clean and professional. Everything looks factory and sounds amazing. The prices were fair and customer service was above and beyond. I highly recommend this place if you're looking for quality car audio and excellent service.
Those guys are really professional! I had a new Alpine floating head unit installed in my 2008 Mercedes, and it feels like a brand-new car. The installation was super clean. At first, the sound wasn’t the same as the factory stereo, but Kevin tuned it to be just as good—if not better—without adding any new amps. They even used my factory GPS antenna so I don’t have extra wires hanging out. On top of that, they matched the online price. Big thanks to Kevin and Eddie—highly recommended!
Kevin was awesome, he took his time and explained everything to me. I went in initially for a dash cam install and then decided to get a sub and amp installed as well. Both turned out great and will be returning if I need more work done.
Came In not knowing what to expect when suddenly my stereo stopped working. Spoke with Kevin in the front and after a VERY fast diagnosing they discovered my wiring was incorrect. After only about 45 minutes total being in the store I was on my way to the beach with a working stereo again! Thank you so much SDCARSTEREO
Highly recommend Kevin and the team at San Diego Car Stereo for any issues with aftermarket stereos. I bought a car with an aftermarket stereo and AC unit that wasn’t working properly—specifically, the heat wasn’t functioning due to an improper setup. I had several people look at it with no luck, and even the dealership basically refused to help because it was an aftermarket install. I came to Kevin and his team over the holidays feeling pretty defeated, but he was confident he could get the heat working before I headed back to a Colorado winter. Sure enough, he got it done.
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.