Kenwood KFC-C683 6 in x 8 in 2-Way Concert Series Car Speakers - Clear

Our review of the Kenwood KFC-C683 6 in x 8 in 2-way Concert Series car speakers finds they are a solid upgrade for drivers who want clearer highs and stronger bass without swapping head units. The biggest reason to buy is the combination of a polypropylene woofer with a diamond array pattern and a balanced dome tweeter, which together produce a balanced, durable sound signature that stands up to outdoor road noise and varied music. Installation is straightforward thanks to the enlarged frame opening, so they fit many factory locations with minimal modification.

Key Features

• 360W peak power / 81W RMS: Delivers dynamic volume headroom and sustained output for in-car listening at highway speeds.
• Polypropylene woofer cone: The diamond array pattern and rubber surround reduce cone distortion and improve bass clarity over stock speakers.
• Balanced dome tweeter: A 1-3/16 in tweeter provides crisp, detailed highs that help vocals and cymbals cut through.
• Acoustic Sound Harmonizer: Targets the 3000 to 4000 Hz range to smooth mid-high response and make instruments sound more natural.
• New frame design: Enlarged open area increases bass output and simplifies installation in a range of vehicle speaker locations.

Who It's For

These speakers are best for drivers who want a direct replacement with noticeably better clarity and punch than typical factory coaxials. Audiophiles on a modest budget will appreciate the improved midrange and controlled bass from the polypropylene cone and rubber surround.

They are less suited to systems that demand extreme low-end extension from a single speaker; people seeking deep subwoofer-level bass or custom component crossovers may prefer pairing these with a dedicated sub or component set.

Pros & Cons

Pros

• Better overall clarity and power handling than many stock speakers, backed by 360W peak power.
• Durable polypropylene woofer with diamond array pattern minimizes distortion under load.
• Balanced dome tweeter yields detailed high frequencies and improved vocal presence.
• Frame design eases installation and boosts usable bass output in typical vehicle doors.

Cons

• Not a substitute for a dedicated subwoofer if deep, room-shaking bass is a priority.
• Limited tuning options compared with component speaker sets and external crossovers.

Specifications

Our Verdict

The KFC-C683 is a practical, value-focused upgrade for drivers who want clearer highs and tighter bass from a direct-replacement coaxial speaker. Its durable polypropylene cone, balanced dome tweeter, and Acoustic Sound Harmonizer deliver a smoother, more natural sound without complex installs, making it a smart choice for most daily drivers who want a noticeable audio improvement.

Frequently Asked Questions

Will these fit in factory 6x8 openings?
Yes, the revised frame with an enlarged open area is designed to fit common 6 in x 8 in factory locations with minimal modification.

Do these require an external amplifier?
They can run from many factory head units thanks to 81W RMS capability, but an external amp will provide cleaner headroom and better control at high volume.

Are they weather resistant?
The polypropylene cone and rubber surround improve durability, but they are intended for vehicle interior use behind door panels rather than exposed outdoor mounting.