1-3/16-Inch PEI Balanced-Dome Tweeter for Detailed Highs
The KFC-C5798RS features a 1-3/16-inch PEI balanced-dome tweeter integrated into its coaxial speaker assembly.
PEI, or polyetherimide, is a lightweight polymer material used in many automotive tweeter designs.
The balanced-dome configuration helps reproduce upper-frequency musical details without requiring separate tweeter mounting locations.
This design is especially useful for drivers who want to improve the clarity of:
- Vocals and harmonies
- Cymbals and percussion
- Acoustic guitar strings
- Piano notes and upper-frequency instruments
- Spoken audio, podcasts, and radio broadcasts
Unlike a component speaker system, the coaxial configuration places the tweeter within the main speaker assembly.
That makes installation simpler in compatible factory speaker locations.
For enthusiasts who want a noticeable upgrade without extensive interior modifications, this is one of the most practical advantages of the KFC-C5798RS.
Acoustic Sound Harmonizer for Smoother Midrange Reproduction
One of the features that distinguishes the Kenwood KFC-C5798RS from basic replacement speakers is its Acoustic Sound Harmonizer.
This Kenwood design is intended to improve the relationship between the woofer and tweeter through the upper-midrange region.
The manufacturer describes its effect around the 3,000–4,000 Hz range, an important area for vocal presence and instrumental detail.
Poorly balanced reproduction in this frequency region can make music sound unnatural, harsh, or disconnected.
The Acoustic Sound Harmonizer is designed to help produce a smoother transition and a more coherent listening experience.
For everyday music, that can contribute to better vocal intelligibility and more natural upper-midrange presentation.
It is a useful feature for drivers who value balanced sound rather than simply maximum volume.
320W Peak Power and 80W RMS for Aftermarket Audio Upgrades
The Kenwood KFC-C5798RS is advertised with 320 watts peak power and 80 watts RMS.
Understanding the difference between these ratings is important when choosing compatible audio equipment.
Peak power describes short-duration handling capability, while RMS power is the more useful figure for matching speakers to an amplifier.
A properly matched amplifier can provide clean dynamic output without forcing the system into excessive distortion.
These speakers may also be used with compatible aftermarket head units, although the available output power will affect maximum listening volume.
When upgrading your audio system, avoid choosing an amplifier based solely on advertised peak wattage.
Instead, consider the continuous output rating, speaker impedance, and intended listening levels.
Our car amplifier setup guide explains how to match speaker power ratings with amplifier output and why correct gain adjustment is essential.
5×7-Inch Speaker Design for Convenient Factory Replacement
The Kenwood KFC-C5798RS is designed around the popular 5×7-inch automotive speaker format.
Many vehicles use oval speakers in factory door or rear-panel locations, making a similarly sized aftermarket replacement a practical choice.
The KFC-C5798RS has an advertised 2-1/16-inch top-mount depth, which can help with installations where clearance behind the speaker is limited.
Potential mounting locations include:
- Compatible front door speaker openings
- Rear door speaker locations
- Rear side panels
- Factory oval speaker locations
- Custom automotive speaker installations
Some vehicles use 5×7-inch and 6×8-inch speaker formats interchangeably with suitable mounting hardware, but these dimensions are not universally interchangeable.
Always verify the factory speaker opening, screw pattern, mounting depth, and wiring before purchasing.
Adapter brackets or wiring harnesses may be required.
If you’re deciding between a direct-fit replacement and a more extensive upgrade, our best car speakers upgrade guide covers the practical differences between common aftermarket speaker configurations.
Built for Everyday Driving and Long-Term Reliability
Car speakers must operate in an environment that exposes them to temperature changes, vibration, humidity, and regular use.
The Kenwood KFC-C5798RS combines durable polypropylene woofer construction with a flexible rubber surround to support consistent operation.
Its integrated coaxial design also avoids the additional mounting work associated with separately installed tweeters.
For daily drivers, this combination makes the KFC-C5798RS an appealing replacement for aging factory speakers.
A secure installation is just as important as the speaker itself.
Loose mounting hardware, poor door sealing, damaged wiring, and vibrating interior panels can all reduce sound quality.
For best results, install the speakers securely, verify electrical connections, and address rattles or damaged mounting surfaces before reassembling the interior.
Kenwood KFC-C5798RS Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Kenwood |
| Model | KFC-C5798RS |
| Speaker type | 2-way coaxial |
| Speaker size | 5 x 7 inches |
| Maximum power | 320 watts, advertised |
| RMS power | 80 watts, advertised |
| Woofer cone | Diamond-pattern polypropylene |
| Woofer surround | Rubber |
| Tweeter size | 1-3/16 inches |
| Tweeter material | PEI balanced dome |
| Sound technology | Acoustic Sound Harmonizer |
| Mounting depth | 2-1/16 inches |
| Application | Compatible automotive factory and aftermarket audio systems |
Confirm whether the advertised power figures are per speaker or per pair against the packaging or current manufacturer documentation before publishing the final specification table.
Frequently Asked Questions
Are Kenwood KFC-C5798RS speakers good for replacing factory speakers?
Yes. These 5×7-inch coaxial speakers are designed for compatible automotive installations and can improve clarity, midbass, and high-frequency detail compared with damaged or deteriorated factory speakers.
Do the KFC-C5798RS speakers have separate tweeters?
No. The speakers use an integrated 2-way coaxial configuration with a PEI balanced-dome tweeter mounted within the speaker assembly.
What is Kenwood’s Acoustic Sound Harmonizer?
It is a speaker design feature intended to improve frequency response and the transition between woofer and tweeter output, particularly in the upper-midrange region.
Can I use these speakers with my factory stereo?
Possibly. Compatibility depends on the factory stereo or amplifier’s impedance and power requirements, as well as the vehicle’s wiring configuration.
Will Kenwood 5×7 speakers fit 6×8 speaker openings?
Some 5×7 and 6×8 applications share compatible mounting arrangements, but fitment is not guaranteed. Check the mounting pattern and clearance before ordering.
Will these speakers produce deep bass?
They can provide useful midbass, but a dedicated subwoofer is recommended for substantial low-frequency output.
Do I need an amplifier for the Kenwood KFC-C5798RS?
An external amplifier is not always required, but clean, appropriately matched amplification can help improve available output and dynamic headroom.
Why Choose Kenwood KFC-C5798RS 5×7 Speakers?
The Kenwood KFC-C5798RS combines a durable polypropylene woofer, detailed PEI balanced-dome tweeter, and Acoustic Sound Harmonizer technology in a convenient 5×7-inch coaxial package.
For drivers who want clearer music, better vocal definition, and improved everyday listening without installing a complex component speaker system, these Kenwood speakers offer a practical upgrade path.
Replace tired factory speakers with Kenwood KFC-C5798RS 5×7-inch 2-way car speakers and enjoy a more balanced, detailed soundtrack on every drive.
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