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For over 50 years, Infinity has consistently made some breakthrough product designs in the audio industry. The brand has mastered the art of making and providing a wide range of appealing and premium quality audio equipment at very reasonable prices. To further explain this, here is an Infinity Reference vs. Kappa run down.

Before I got my first car, I always imagined myself driving down the highway with my radio cranked all the way, blasting my favorite sounds. However, my first vehicle was an old Volkswagen whose sound system was nothing but poor quality. Its speakers delivered numerous vibrations, which distorted he sound quality of my music. Consequently, I had to save up and buy a new pair of excellent quality speakers. Speakers are an essential part of a vehicle’s audio system. They allow audio impulses to pass through them, releasing audio waves that translate to the music we hear as we drive around in our vehicles. The type, construction, and position of the speakers contribute to the quality of sound you receive in your vehicle. Luckily, you can get good quality speakers for your car despite your budget or type of speakers you want.

If you are looking to upgrade your vehicle’s sound equipment, Infinity products should be at the top of your list. Founded in 1968, Infinity is an American manufacturer of high-quality audio equipment The brand has a reputation for providing breakthrough designs, durable, and top sound quality audio equipment that fits in a wide range of markets, including the automobile industry, home, and office sound solutions, as well as marine use. The brand is one of the primary suppliers of audio products for popular automobile brands like Kia, Hyundai, Chrysler, and Mitsubishi.

Infinity Reference and Kappa series are some of the best and most reviewed products of the brand. They offer incredible sound output, excellent and innovative designs that fit most vehicles, and available at pocket-friendly prices. Let us quickly delve into this comprehensive Infinity Reference vs. Kappa review.

What are the differences between Infinity Reference and Kappa speakers?

Infinity Reference REF-6522lX Infinity Kappa 62.11i
Speaker size 6.5-inches 6 ½-inches
Tweeter design and composition 1” Edge-driven textile dome Edge-driven textile 1” dome
Woofer surround and composition Formed glass-fiber cone with rubber surround Polypropylene cone with rubber surround
Crossover components Polypropylene capacitors and sandstone resistors, among many others Polyester capacitors and air conductors, among many others
Magnet and voice coils Ferrite magnet structure and 3” voice coils Vented magnet assembly and 3.2-inch voice coils
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Infinity Reference vs. Kappa – How do they compare to one another?

Woofer cone structure

Infinity is known to provide audio lovers with the best quality and value for their money once they purchase their products. Infinity Reference speakers contain superior technology and a compact design that delivers Infinity’s signature sound quality in any vehicle model. It uses edge-driven textile tweeters to provide clear and smooth high audio notes, ensuring you get value for your buck. These speakers consist of Harman Patented Plus One woofer cones that feature an increased midrange performance and enhanced bass output. More so, its cones contain polypropylene material, which creates more speaker-cone surface area for increased low-frequency output, better musical character, and higher sensitivity.

On the other hand, Infinity Kappa Series also has the brand’s patented Plus One woofer, known to produce tight and robust bass with a musical and detailed high-output sound. Its woofers contain glass fiber material, which is stiffer and lighter than those of the Infinity Reference series, giving it an additional speaker-cone area that delivers better sound quality.

Crossover components

A crossover is an electronic device that contains a single input signal that creates multiple output signals that consist of different bands of frequency to feed the different ‘drivers’ or speakers in a sound system. There are several small electronic components in a crossover that ensure they perform their function effectively. Some crossover components include low and high pass filters, capacitors, resistors, ‘bandpass’ filters, and various drivers.

As a result, crossover components are essential to the quality of sound speakers deliver. The Infinity Reference Speaker series contain a committed outboard passive crossover network that comes with polypropylene resistors and sandstone resistors, among other components. Its two-way external crossover network is ideal for fine-tuning your sound system to suit your needs at any particular moment.

Alternatively, Infinity Kappa Speaker series crossover components include the use of polyester capacitors and air inductors, among many others, that contribute to the quality of sound delivered. These speakers contain a two-way external system with bandpass crossover components that are upgradeable to three-way systems for enhanced performance. The Kappa series also consists of audiophile capacitors and inductors, which produce audio accuracy and details unmatched by other speaker brands of the same class.

Magnet and voice coils

A voice coil is a metal coil in the loudspeaker cone that provides the motive force that creates the magnetic field in the speaker, causing vibrations back and forth. The coil allows an electric current to pass through it, causing the magnet in the loudspeaker cone to repel and attract; thus, creating vibrations.

Infinity Reference speakers have a ¾” edge-driven textile tweeter dome with 3″ voice coil designs to compensate for the high in-line resistance of the receivers. As a result, these speakers produce a clear and more vibrant sound for the listener.

On the other hand, the Kappa series consists of longer voice coils and a larger magnet, allowing them to play louder and richer sounds without distortion. Its oversized voice coils produce smooth and silky high tunes with enhanced thermal power, ideal for high-volume sound enthusiasts.

Infinity Reference vs. Kappa- A comparison review

Infinity Reference Ref-6522IX Overview and Key features

As one of the best sounding speakers available in the market, the Infinity Reference Ref-6522IX is a significant upgrade from the factory audio equipment that comes with vehicles and other automobiles. It offers Infinity’s signature sound quality to almost any vehicle owner as it fits nearly all car installation sizes.

These 6.5-inch speakers offer value for your money due to its incredible performance. They consist of a two-way configuration system, which is easy to install and produces better sound quality. These speakers comfortably fit in any existing compartments, and if you require any customization, its package contains brackets that allow you to mount the devices on any type of opening. It also includes grilles to ensure that the installation of the speakers is always neat and protected.

Infinity Reference speakers feature their patented Plus One Woofer, whose design contains a large cone surface area for enhanced bass quality and increased midrange performance. The speakers also have in-built crossover components that ascertain they deliver excellent musical characters, increased low-frequency output, and increased sensitivity. Its rubber surrounds ascertain that the speakers have sufficient protection for a long time of use.

Similarly, these speakers have edge-driven textile dome tweeters to deliver crystal clear high and low audio frequencies without distorting the sound at loud volumes. They also have bass blockers to improve the overall sound quality and prevent sound distortion.

The tweeters have a level control that allows the fine-tuning of the device’s brightness to match your taste. The level control has two settings; 0 dB for a flatter response during high volumes and 3 dB for a more high-pitched and defined sound. The dome tweeters utilize Infinity’s invention of the UniPivot that ensures that your speakers are always angled at the right position for clear sounds when playing at high volumes.

Other specifications of these audio devices include a sensitivity of 93dB with an impedance of 3ohms and a frequency response range of 53Hz to 21KHz. They are also attached to a very reasonable price, despite having a power handling peak of 180 watts with an RMS of 60 watts.

What we like

  • Sound output has excellent vibrancy and clarity
  • Exceptional midrange and high frequencies
  • Reasonable and affordable pricing
  • Manufactured in the USA
  • Aesthetically pleasing Plus One Woofer architectural design

What we do not like

  • A little lower in volume and bass when compared to its competitors in the same category


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Infinity Kappa 62.11i Overview and Key features

If you are looking for speakers with enhanced bass and sound quality, the Infinity Kappa 62.11i speakers are a perfect choice. These audio devices are an excellent investment for anyone looking to upgrade their vehicle’s audio system as they deliver balanced sound. Attached to an incredibly pocket-friendly price, these speakers offer enhanced bass output, with many saying it is better than some of its predecessors in the Infinity Car Speakers Family.

Infinity Kappa 62.11i speakers are built and designed with quality and ease of use in mind. They consist of 1″ edge-driven textile soft dome tweeters that produce crystal clear and natural-sounding sound frequencies. Unlike the previous ‘W-shaped’ tweeters in Infinity Speakers, these speakers have an edge-driven tweeter design that allows a larger tweeter surface area, giving it the ability to handle more power. In turn, they produce a smooth frequency response ranging from 45Hz to 25KHz.

Furthermore, the tweeters have Infinity’s UniPivot design, which allows users to adjust the direction of each tweeter to their liking, ensuring they receive excellent stereo imaging even when the speakers are mounted at a lower position on your doors. Each tweeter comes with a level control switch that adjusts the brightness and fine-tunes the highs to your preference.

These speakers are of premium quality as they deliver excellent and clear bass and sound quality without any audio distortion as you adjust them to a higher volume. Their highest sensitivity rating is 95dB with an impedance of 2ohms, meaning you can install them on a factory-installed stereo. However, you are likely to get the best results from hooking them up to an amplifier unit or a powerful aftermarket head unit, with continuous power handling RMS ranging between 75 watts RMS and 225 watts RMS.

Due to the versatility of the speaker design, installation is quite straightforward. As a result, these speakers do not only improve your vehicle’s audibility, but they also enhance its overall aesthetics. Other features of these speakers include a glass fiber woofer cone with hi-roll butyl rubber surround for additional protection and deep level bass output, and a top-mounting depth of 2 1/8″. The speakers also come with wall brackets for easier and flexible installation.

What we like

  • High sound output quality with a tighter bass
  • Alluring and aesthetically-pleasing design
  • Easy to install and fits most vehicles easily

What we do not like

  • Utilizes a little power at peak power handling compared to its competitors in the market


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It is never a bad decision to upgrade your vehicle’s audio system. However, you may find it challenging to pick the best audio equipment for your car due to the numerous options available in the market. Infinity car speakers are some of the best audio devices in the automobile market. The brand has been in the audio industry for quite a long time, meaning they have mastered the necessary standards of quality, design, and pricing that car owners want for their automobiles.

These speakers contain a high sensitivity rating and can handle enormous amounts of power, ensuring you receive high-quality sound without any distortion. They also have durable parts that last for a long time without any wear or tear. Depending on your budget, you can find an ideal Infinity speaker for your vehicle.