Kicker 51KSC6804 KS-Series 6x8 Coaxial Speakers

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86%
88%
Sound Quality
90%
Bass Performance
85%
Clarity at High Volume
92%
Installation Ease
89%
Build Quality
91%
Value for Money
87%
Durability
84%
Fit & Compatibility
78%
Customer Support
83%
Soundstage & Imaging
86%
Amplifier Pairing
82%
Midrange Clarity
More

Overview

The Kicker 51KSC6804 KS-Series 6x8 Coaxial Speakers are a solid upgrade for car audio enthusiasts looking to improve sound quality. These speakers are engineered for superior sound clarity and deep bass, making them ideal for replacing factory audio systems. With a 6x8 size, they fit well into many vehicle models without requiring major modifications. Kicker's KS-Series is known for its impressive performance, and these speakers live up to that reputation, offering a rich audio experience without overwhelming the listener. If you're seeking a simple yet effective upgrade, these Kicker speakers are a great choice.

Features & Benefits

The Kicker 51KSC6804 speakers are equipped with a 4-ohm impedance, ensuring they are compatible with most car amplifiers. They feature polypropylene cones and rubber surrounds, which contribute to durability and accurate sound reproduction. The minimal tweeter protrusion allows for easy installation, fitting into tight spaces without compromising sound quality. These design features ensure that the speakers perform well over time while maintaining crisp highs and deep lows. Whether you're upgrading your audio system or replacing old speakers, these KS-Series speakers provide a reliable, high-performance solution.

Best For

These Kicker speakers are best for car audio enthusiasts who want to enhance their sound system without a full overhaul. They’re ideal for users seeking an affordable upgrade that offers a significant improvement in bass and clarity over factory speakers. The speakers perform well in small to mid-sized vehicles, offering a great balance between bass and clarity, which makes them perfect for anyone looking to replace worn-out or underperforming factory audio. If you want better sound without spending on high-end systems, this car audio upgrade is a fantastic option.

User Feedback

Users generally praise the Kicker 51KSC6804 speakers for their easy installation and noticeable improvement in sound quality. Many find the balance between bass and clarity especially impressive, even at higher volumes. Some reviewers noted that the speakers perform best in smaller vehicles, where the sound can fill the cabin without distortion. On the downside, a few users mentioned that the sound could be a bit too subdued for larger vehicles unless paired with a more powerful amplifier. However, most find these speakers to be a great value for the price.

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#Speakers
#Car Audio
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Pros

  • Easy installation with minimal tweeter protrusion makes setup straightforward for most users.
  • Solid sound quality with a balanced mix of bass and clarity, especially at higher volumes.
  • Durable polypropylene cones and rubber surrounds ensure long-lasting performance.
  • Affordable option for users looking to upgrade their factory car audio without major costs.
  • 4-ohm impedance ensures compatibility with most car amplifiers, making it versatile for various setups.
  • Works well for small to mid-sized vehicles, offering clear midrange and bass without overwhelming the cabin.
  • An excellent choice for users replacing worn-out or stock speakers without compromising sound quality.
  • Good value for money in the 6x8 coaxial speaker category, with clear, distortion-free sound at moderate levels.

Cons

  • Bass performance may not be deep enough for users seeking heavy bass at high volumes.
  • Not ideal for large vehicles where more powerful audio systems are required for fuller sound.
  • Sound quality may fall short for audiophiles or those demanding superior audio clarity and precision.
  • Limited bass depth can be disappointing for those into genres that rely heavily on low-end frequencies.
  • Some users reported that the speakers work best for light to moderate listening rather than high-energy music.
  • The overall performance might not be sufficient for those with complex, high-end car audio systems.
  • A few reviewers felt the speakers struggled with producing a full soundstage, especially at maximum volume.

Ratings

After analyzing verified user reviews across multiple languages and platforms, we've compiled the scores for the Kicker 51KSC6804 KS-Series 6x8 Coaxial Speakers. Only authentic, high-quality feedback, free from spam or exaggerated claims, contributed to these ratings. Both the strengths and pain points shared by users are reflected in the results, providing a comprehensive overview of this car audio upgrade's performance and value across different regions and customer experiences.

Sound Quality
88%
Many users report that these speakers deliver clear and detailed sound, particularly excelling at reproducing both midrange frequencies and crisp highs. The balance between bass and clarity makes them versatile for various music genres, making them a solid option for car audio enthusiasts seeking better sound fidelity without overhauling their entire system.
A few users felt the bass response could be a bit more pronounced, especially when compared to higher-end models. Some mentioned that, at higher volumes, the bass can become a little muddy or distorted, which might not satisfy those seeking deep, booming lows in their audio experience.
Bass Performance
90%
Reviewers frequently highlight the impressive bass output of these speakers, noting that they provide a deep, rich low-end without overwhelming the midrange. Even without a subwoofer, they offer a well-rounded audio experience that enhances low-frequency playback, making them an excellent choice for anyone wanting to improve car audio without a major upgrade.
While the bass is generally praised, some users indicated that it's not as punchy or deep as they would like, especially for heavier bass music genres. A few buyers also mentioned that the bass might not be sufficient for larger vehicles or those used for more intense audio setups.
Clarity at High Volume
85%
Most reviewers appreciate that these speakers maintain clarity even when pushed to higher volumes. They’re able to handle dynamic ranges without significant distortion, allowing for an enjoyable listening experience, even when driving at highway speeds. This makes them a great choice for those who like to enjoy their tunes loudly while maintaining audio fidelity.
However, there were some complaints about the high-end frequencies becoming harsh or a bit tinny at extreme volumes. Some users found that vocals or cymbals could sound less smooth, particularly when the speakers were cranked up to their limits.
Installation Ease
92%
Installation is often described as straightforward by many users. The minimal tweeter protrusion design helps these speakers fit into a variety of car models with ease, even in tighter spaces. Most users were able to install them without professional help, making it a hassle-free upgrade for those looking to enhance their car audio system quickly.
Though installation is generally easy, some users reported challenges with mounting depth in certain vehicle models. A few found the mounting screws slightly difficult to align or felt that the instructions could have been more detailed for a smoother installation process.
Build Quality
89%
Users frequently commend the robust build quality of these speakers, with many noting the durable polypropylene cones and rubber surrounds that ensure longevity. These materials are praised for their ability to withstand heat and moisture, making them well-suited for use in cars, which experience varied environmental conditions.
A handful of reviewers did mention concerns about the overall weight of the speakers, particularly for those looking for a lighter or more compact option. Additionally, some felt that while the materials are durable, they might not be as premium-feeling as more expensive alternatives on the market.
Value for Money
91%
The overall value for money is a standout feature in reviews. Buyers feel they are getting solid sound quality and good bass response at a relatively affordable price point. These Kicker speakers are often considered a great option for those seeking an upgrade without breaking the bank, making them a solid choice for cost-conscious car audio enthusiasts.
While many are satisfied with the performance, some buyers expressed that there are similarly priced alternatives with more bass or a higher sound resolution. A few feel that while they offer good value, a slightly higher investment could yield a noticeably better audio experience.
Durability
87%
The durability of these speakers is praised by many users who have reported long-lasting performance even in challenging environments. The polypropylene cones and rubber surrounds hold up well over time, with users noting that they continue to deliver solid audio performance after several months or even years of use.
A few reviewers expressed concerns about wear and tear on the rubber surrounds after prolonged exposure to extreme temperatures or heavy use. Although not widespread, a small number of users reported that the speakers showed signs of degradation under certain conditions.
Fit & Compatibility
84%
The 6x8 size of these speakers makes them highly compatible with many car audio systems. Users were pleased with how easily they fit into a range of vehicle models, making them an excellent upgrade for those with specific size requirements. The standard 4-ohm impedance ensures they pair well with most car amplifiers without issues.
However, some buyers found that the fit wasn't perfect for their specific model or vehicle type. In a few cases, adjustments were necessary, which could complicate the installation process for those with non-standard audio setups or less experience with car audio systems.
Customer Support
78%
22%
Some users reported a positive experience with Kicker's customer support, especially when dealing with warranty claims or minor product defects. The team was generally responsive and willing to help resolve issues, ensuring a more satisfactory ownership experience.
On the other hand, several buyers found the customer support to be less responsive or unhelpful, particularly when it came to addressing issues with defective units or missing parts. A few reviews mentioned delays in response times and difficulty getting clear answers, leaving some frustrated with the support experience.
Soundstage & Imaging
83%
While not designed for audiophiles, these speakers still offer a decent soundstage for casual listeners. The clarity and balance allow for a solid stereo experience, with the speakers providing an enjoyable spatial separation of instruments and vocals in typical car settings.
Some users noted that the imaging felt somewhat limited compared to more premium audio systems, with less accurate placement of sounds across the car. In larger vehicles, this issue may be more noticeable, as the speakers' soundstage could struggle to provide a more immersive experience.
Amplifier Pairing
86%
These Kicker speakers are a great match for most car amplifiers, with their 4-ohm impedance ensuring efficient power handling. Buyers report that the speakers perform well with a variety of amplifiers, and the setup is particularly beneficial for those seeking an easy upgrade with minimal additional equipment needed.
A few buyers experienced issues when pairing the speakers with specific high-powered amplifiers, where the speakers struggled to handle maximum output levels. Some users felt that for more demanding setups, a higher-end speaker might provide better performance at higher volumes.
Midrange Clarity
82%
18%
Users are generally satisfied with the midrange clarity of these speakers, noting that vocals and instruments come through clearly without being overpowered by bass or highs. This makes them a good option for those who want a well-rounded listening experience without sacrificing vocal intelligibility.
However, a few reviewers pointed out that the midrange could sound a bit recessed at times, especially when the bass is turned up. Some users felt that a more pronounced midrange would improve the overall balance, especially for music genres with a lot of vocal emphasis.

Suitable for:

The Kicker 51KSC6804 KS-Series 6x8 Coaxial Speakers are ideal for car audio enthusiasts looking for an affordable way to upgrade their vehicle's sound system without needing a full overhaul. This product is perfect for individuals who want clear midrange and bass, especially in small to mid-sized cars, where space and installation ease are important factors. Users seeking a quick, hassle-free installation with minimal protrusion will appreciate the straightforward setup process. Additionally, it’s well-suited for people with factory audio systems looking to enhance sound quality without significant investment, such as budget-conscious buyers or those new to car audio upgrades.

Not suitable for:

However, the Kicker 51KSC6804 KS-Series speakers may not be the best choice for audiophiles or users seeking extremely deep, powerful bass or a highly immersive soundstage. The bass response, while solid, might not satisfy those who demand punchier or more pronounced lows, particularly in larger vehicles or for high-energy music genres. Additionally, those with complex or high-end audio setups might find the performance lacking in terms of imaging and soundstage, as the speakers' clarity and range are optimized more for casual listening rather than audiophile-grade experiences. People looking for a speaker that delivers deep bass at higher volumes may also be disappointed with the overall bass performance at max output.

Specifications

  • Speaker Type: These speakers are coaxial, meaning they combine multiple speaker components in a single unit for easy installation and better sound.
  • Size: The speakers have a 6x8-inch size, a common format that fits many vehicles' audio systems.
  • Impedance: With a 4-ohm impedance, these speakers are compatible with most car amplifiers.
  • Power Handling: The speakers handle between 50-150 watts RMS, making them suitable for a wide range of car audio amplifiers.
  • Frequency Response: The frequency response ranges from 45Hz to 20kHz, ensuring a broad range of sound reproduction.
  • Sensitivity: With a sensitivity of 90dB, these speakers deliver good output at moderate amplifier power.
  • Cone Material: The cones are made of polypropylene, which enhances durability and sound accuracy.
  • Surround Material: Rubber surrounds provide flexibility and long-term durability, improving performance and longevity.
  • Tweeter Size: The speakers feature a 1-inch tweeter for clear, detailed high frequencies.
  • Mounting Depth: The mounting depth is 2.55 inches, ensuring compatibility with a variety of car audio systems.
  • Installation Ease: These speakers are designed for easy installation, with minimal tweeter protrusion that fits in most standard 6x8-inch mounts.
  • Application: These speakers are designed specifically for car audio systems, providing an upgrade to factory-installed speakers.
  • Vehicle Compatibility: They are ideal for small to mid-sized vehicles, but their performance may be limited in larger cars or trucks without additional subwoofers.
  • Mounting Type: The speakers use a standard 6x8-inch mounting type, ensuring easy replacement of factory speakers in most vehicles.
  • Bass Performance: These speakers provide a good balance of midrange and bass, making them a solid choice for those seeking an upgrade without a full system overhaul.
  • Durability: Built with high-quality materials like polypropylene cones and rubber surrounds, these speakers are designed for long-term use in car environments.
  • Clarity at High Volumes: The speakers maintain a clear and balanced sound even at higher volumes, ensuring a good listening experience without distortion.
  • Warranty: The product typically comes with a manufacturer warranty, offering peace of mind in case of defects or issues.

FAQ

These speakers provide a great balance between bass and clarity, offering noticeable improvements over factory speakers. With a 4-ohm impedance, they work well with most car amplifiers, making them ideal for upgrading your audio system without the need for a full overhaul.

Yes, the 4-ohm impedance makes the Kicker 51KSC6804 KS-Series 6x8 Coaxial Speakers compatible with most car amplifiers, ensuring broad compatibility. Just make sure your amplifier supports the power range of 50-150 watts RMS.

Installation is straightforward, thanks to the minimal tweeter protrusion and the well-designed mounting depth. These features allow for easier setup, even in tight spaces, making them a great option for DIY installers.

Yes, many users report that these speakers maintain clarity and balance even at higher volumes. However, while they perform well for most users, those seeking deep, powerful bass may need to adjust expectations when pushing them to the extreme.

The polypropylene cones and rubber surrounds are built for durability, offering long-lasting performance. These materials help the speakers handle the vibrations and wear from constant use, ensuring they remain reliable over time.

These speakers are best suited for small to mid-sized vehicles. For larger cars or trucks, you might need more powerful speakers or additional subwoofers to achieve the same level of bass and sound clarity.

The Kicker 51KSC6804 KS-Series speakers handle between 50 and 150 watts RMS, which makes them suitable for most car audio systems. Just ensure your amplifier matches their power handling capabilities to avoid damage.

While these speakers provide clear midrange and bass, they may not deliver the deep, booming bass that some bass-heavy music genres require. If you're a fan of extreme bass, consider adding a subwoofer to complement their performance.

Users find that these speakers offer a significant sound improvement over stock or factory speakers, especially in terms of clarity and bass balance. They provide a richer, fuller sound without needing a complete audio system overhaul.

Yes, as long as your vehicle supports 6x8-inch speakers and has a compatible amplifier, these speakers should work well. If you're unsure, check the speaker size and mounting depth in your vehicle to ensure compatibility.