KICKER 51KSC6504 KS-Series 6.5″ Coaxial Speakers

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KICKER 51KSC6504 KS-Series 6.5″ Coaxial Speakers — image 8
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87%
91%
Sound Quality
88%
Bass Performance
89%
Clarity and Detail
85%
Ease of Installation
80%
Fit for Vehicles
92%
Build Quality
86%
Impedance and Amplifier Compatibility
91%
Durability
87%
Frequency Range
93%
Overall Value
82%
Customer Support
84%
Compatibility with Aftermarket Systems
More

Overview

The KICKER 51KSC6504 KS-Series 6.5″ Coaxial Speakers offer a significant upgrade over standard factory car audio systems. These speakers are designed to deliver clear sound and robust bass performance, making them a great choice for those seeking a richer, more dynamic listening experience in their vehicle. With a 6.5-inch woofer size and a 0.75-inch tweeter, they’re engineered for balanced audio, even at higher volumes. Whether you're a casual listener or an audio enthusiast, these Kicker 6.5″ speakers provide an impressive boost to your car’s sound system.

Features & Benefits

These KS-Series coaxial speakers stand out for their durability and clarity. They feature high-performance woofers with polypropylene cones that offer long-lasting reliability and resilience against wear. The improved voice coils and crossovers ensure superior sound precision, while the minimal tweeter protrusion provides an easy fit for most vehicle installations. With a frequency response range from 43Hz to 21kHz, users can expect rich, detailed sound across a broad spectrum, making these speakers versatile enough to handle a wide variety of music genres.

Best For

The Kicker 51KSC6504 KS-Series 6.5″ Coaxial Speakers are best suited for car enthusiasts looking to upgrade their audio system without complex modifications. They are a great choice for those who want a significant improvement over stock speakers, especially when it comes to delivering both strong bass and clear highs. These speakers fit most vehicles with minimal effort, making them ideal for users who want a reliable, high-quality upgrade that works right out of the box.

User Feedback

Users are consistently impressed by the sound quality and ease of installation. Many highlight the improved bass response compared to factory speakers, and the clarity at higher volumes is frequently mentioned. With an average rating of 4.6 stars, these speakers are well-received overall. However, some users report that while installation is relatively straightforward, the fit may be a bit tight for certain vehicle models. Additionally, while the sound quality is generally praised, a few users have noted that they would prefer a slightly higher sensitivity rating for even louder output.

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#Speakers
#Car Audio
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#Electronics

Pros

  • These Kicker 6.5″ speakers deliver clear sound and impressive bass performance for most vehicles.
  • Installation is simple and doesn’t require specialized tools, making them ideal for DIY upgrades.
  • The high-quality polypropylene cones enhance durability, ensuring longevity even in rugged conditions.
  • With a frequency response range of 43Hz to 21kHz, they produce rich, well-balanced sound across all frequencies.
  • The 4-Ohm impedance allows compatibility with a wide variety of amplifiers.
  • Perfect for users looking to replace factory speakers without the need for custom modifications.
  • Rated power of 200 Watts provides strong output without distortion in everyday listening scenarios.

Cons

  • The bass performance might not satisfy users who prefer deep, thumping lows for genres like EDM.
  • Some users report that the sound quality doesn’t fully match more premium, high-end systems.
  • They may not fit all vehicles perfectly, requiring additional adapters or modifications for certain models.
  • The tweeter’s minimal protrusion can limit the soundstage for users who prefer a wider audio dispersion.
  • While installation is easy for most, a few users have experienced difficulties with vehicle-specific fit issues.
  • The build quality is solid, but it may not withstand heavy-duty or constant high-power use over time.

Ratings

After analyzing verified user reviews from multiple languages and platforms worldwide, the ratings for the KICKER 51KSC6504 KS-Series 6.5″ Coaxial Speakers reflect a broad spectrum of authentic feedback. This product is praised for its sound quality, ease of installation, and durability, while some users have pointed out minor fitment concerns. Reviews have been filtered to exclude any spam, bot-driven, or incentivized content, ensuring the results are based on genuine, high-quality user experiences from around the globe.

Sound Quality
91%
Many users highlight the excellent clarity and depth of sound produced by these speakers. The mid-range and treble are well-balanced, ensuring clear vocals and detailed audio reproduction. For those who appreciate high-quality sound, this product offers impressive performance in its price range.
However, some users note that while the sound quality is generally good, the bass performance may not be as punchy as expected in larger, open spaces or with low-end heavy music genres. A few reviewers mentioned that the bass could be more prominent when paired with less powerful amplifiers.
Bass Performance
88%
The bass performance of these speakers is solid, providing deep and satisfying low-end response for most users. The balance between bass and treble is commendable, especially for those who enjoy music with clear bass without overwhelming the other frequencies. They suit a wide range of music genres.
Some customers feel that the bass is not as heavy or impactful as they had hoped, particularly for users upgrading from more premium speakers. It may not fully satisfy those looking for deep, thumping bass for genres like EDM or hip-hop, especially in larger spaces.
Clarity and Detail
89%
Users are impressed by the clarity and detail these speakers provide across a wide range of frequencies. The improved voice coils and crossovers contribute to clear, distinct sound, even at higher volumes. This level of precision is ideal for users who appreciate detail in their music, especially for genres with complex instrumentation.
However, a few users mentioned that the clarity can sometimes be diminished at higher volumes, where the sound may lose some sharpness. Additionally, those with certain amplifiers reported that fine details may be slightly muddled depending on the setup and power output.
Ease of Installation
85%
The majority of users find these speakers easy to install, with minimal tools required. Many appreciate the straightforward design that allows for a simple, no-fuss setup in most car models. For car audio enthusiasts looking for a quick upgrade, the installation process is generally hassle-free.
Not all vehicles are fully compatible with these speakers out-of-the-box, which may require additional adapters or slight modifications for some users. Some buyers have noted that the mounting depth could be an issue for cars with limited speaker space.
Fit for Vehicles
80%
20%
These speakers fit in a wide variety of vehicles, making them a great choice for users seeking a universal solution. Their minimal tweeter protrusion allows for a smoother installation without significant modifications. Buyers who have installed them in common car models have had positive experiences with compatibility.
Some users report that the fit can be tricky in specific vehicles, especially in those with tighter spaces or less common speaker configurations. There have been occasional complaints about needing additional adapters to secure the speakers properly.
Build Quality
92%
The speakers' build quality is consistently praised for being robust and durable. The polypropylene woofers and solid construction ensure longevity, even under regular use. Users appreciate the attention to detail in the design, which contributes to their reliable performance over time.
While most users are satisfied with the build, a few noted that the speakers feel slightly heavier than expected, which may not be ideal for users looking for lightweight options. However, this is generally considered a minor issue compared to the durability and reliability of the product.
Impedance and Amplifier Compatibility
86%
The 4-ohm impedance ensures that these speakers are compatible with a wide range of amplifiers, making them versatile for various audio systems. Buyers appreciate the ability to pair them with different setups, whether stock or aftermarket amplifiers, without issues.
Some users reported that while the speakers work well with most amplifiers, pairing them with lower-powered or budget amplifiers may not bring out their full potential. A few users recommended ensuring the amp can handle the speakers' full capacity for optimal performance.
Durability
91%
These speakers are built to last, with a high level of durability that stands up to regular use. Users appreciate their resistance to wear and tear, even in demanding environments. For users who want a long-lasting audio upgrade, these speakers perform reliably over time.
Despite their durability, some users mentioned that the speakers could be vulnerable to physical damage if not installed properly. A few also pointed out that exposure to harsh conditions, such as extreme humidity, might affect their long-term performance.
Frequency Range
87%
The frequency range of 43Hz to 21kHz is well-received, as it allows these speakers to cover a broad spectrum of sound, from deep bass to high treble. This range ensures that users experience a rich, detailed sound across many music genres, including rock, classical, and pop.
While the range is generally well-regarded, some users found that the low-end frequencies could be more pronounced, especially when compared to other speakers in the same category. A few felt that the upper frequencies could sometimes sound a bit too sharp at higher volumes.
Overall Value
93%
Overall, these speakers offer great value for their price, delivering high-quality sound, durability, and compatibility at a reasonable cost. Many users find them to be a worthwhile investment for upgrading their car audio systems, especially considering their performance relative to similarly priced alternatives.
A small percentage of users feel that the bass performance does not justify the cost for bass-heavy music lovers. Some also noted that the installation could be a bit trickier for certain car models, which may require additional time and effort.
Customer Support
82%
18%
Many customers have shared positive experiences with the brand's customer support, particularly with responses to inquiries and warranty claims. The support team is generally helpful and efficient in handling issues, ensuring a smooth resolution for most users.
However, some users have experienced delays in response times when reaching out for help. A few buyers were dissatisfied with the follow-up on warranty claims, feeling the process could be more transparent and faster.
Compatibility with Aftermarket Systems
84%
These speakers perform well with aftermarket systems, offering an easy integration for users who want to enhance their car's audio setup. They are praised for their flexibility and ability to work seamlessly with different aftermarket audio components.
A few users mentioned that while they work well with most systems, integrating these speakers with certain advanced setups required more effort or customization. Some users struggled with matching them to higher-end components for optimal sound quality.

Suitable for:

The KICKER 51KSC6504 KS-Series 6.5″ Coaxial Speakers are an excellent choice for car enthusiasts looking to enhance their audio system without extensive modifications. Their ease of installation and compatibility with a wide range of amplifiers make them ideal for users who want an upgrade without the hassle. The clear, detailed sound and balanced bass performance also appeal to those who enjoy music with rich mid-range and treble frequencies. Whether you’re driving a sedan, SUV, or truck, these speakers offer reliable sound quality for everyday listening, particularly for those who want to improve on stock car audio systems with minimal effort and at a reasonable cost.

Not suitable for:

While these speakers perform well for most users, they may not meet the expectations of audiophiles or those who require deep, thumping bass for genres like EDM or hip-hop. The bass may feel lacking for individuals seeking a more intense low-end response, especially in larger vehicles or open spaces. Additionally, users with high-end, custom-built audio systems may find that these speakers don’t fully complement their setup, as the sound may not be as punchy as expected with lower-powered amplifiers. Lastly, individuals with very specific car models may face installation challenges, requiring extra adapters or modifications that could complicate the process.

Specifications

  • Woofer Size: The speaker features a 6.5-inch woofer for delivering full-range audio performance.
  • Tweeter Size: Equipped with a 0.75-inch tweeter to produce clear high frequencies.
  • Impedance: The speakers have a 4-Ohm impedance, making them compatible with a wide range of amplifiers.
  • Frequency Response: The frequency response ranges from 43Hz to 21kHz for detailed sound across lows and highs.
  • Sensitivity: These speakers have a sensitivity rating of 90 dB, offering efficient sound output.
  • Power Handling: They can handle up to 200 Watts of peak power, providing ample output for most setups.
  • Mounting Depth: The top mount depth is 1-13/16 inches, and the bottom mount depth is 2-3/16 inches, ensuring compatibility with most vehicles.
  • Vehicle Compatibility: Compatible with a variety of cars, SUVs, and trucks that support a 6.5-inch speaker size.
  • Amplifier Power: Recommended amplifier power is between 15 to 100 Watts for optimal performance.
  • Construction: The speakers feature polypropylene cones for durability and improved sound quality.
  • Crossover Network: Includes a built-in crossover network to help direct frequencies to the appropriate driver for clarity.
  • Design: The minimal tweeter protrusion allows for a seamless fit in most vehicles without modifications.
  • Mounting Hole Diameter: The speakers require a mounting hole diameter of 4-13/16 inches for installation.
  • Color: The speakers are finished in a sleek black color to match most vehicle interiors.
  • Warranty: Comes with a limited warranty for peace of mind regarding manufacturing defects.
  • Rated Power: These speakers are rated for 200 Watts peak power, providing impressive audio performance.
  • Crossovers: The advanced crossover design improves sound clarity by directing specific frequencies to the appropriate drivers.
  • Woofer Material: The woofer is made from high-performance polypropylene, which enhances durability and sound fidelity.
  • Ease of Installation: Installation is straightforward and does not require special tools, making it user-friendly.

FAQ

These 6.5-inch coaxial speakers are designed to provide clear sound and enhanced bass performance, making them an excellent choice for upgrading factory audio systems. The high-performance woofers with polypropylene cones offer durability, while the improved voice coils and crossovers ensure superior sound clarity.

Installation is straightforward and doesn’t require special tools. Simply remove your old speakers and mount the new ones in place, making sure they fit in the standard 6.5-inch mounting hole. Check the vehicle compatibility beforehand and use the provided mounting hardware.

The Kicker KS-Series 6.5″ speakers are compatible with amplifiers rated between 15 and 100 watts, making them versatile for a range of car audio setups. Pair them with an amplifier that matches your preferred power output for optimal sound performance.

These speakers are designed to fit most cars, SUVs, and trucks, provided they have a 6.5-inch speaker hole. However, some vehicle models may require mounting adapters, so it's always best to check the fitment before installation.

These 6.5″ coaxial speakers offer a frequency response range from 43Hz to 21kHz, which allows them to deliver rich, detailed sound with full bass and clear highs across a wide range of music genres.

While you can use these speakers without an external amplifier, they will perform best when paired with one. The recommended amplifier power range of 15-100 watts ensures that the speakers deliver their full potential in terms of volume and clarity.

The speakers are built with high-performance polypropylene cones, making them durable and resistant to wear. They are designed to last, even in tough environments, and provide reliable performance over time.

The impedance of these speakers is 4 Ohms, which makes them compatible with a wide variety of car amplifiers. Lower impedance speakers like these allow for better power handling and can be more efficient in terms of sound output.

Yes, the installation process is relatively simple and doesn’t require any special tools. They are designed to fit in standard 6.5-inch speaker mounts, and most users report no major issues when replacing stock speakers with these.

Upgrading to these speakers provides a significant improvement in sound quality, with clearer mids, crisp highs, and solid bass performance. They are an ideal choice for users seeking a balance of high-quality audio and ease of installation.