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Infinity Kappa Perfect 600

Kappa Perfect Series 6-1/2" component speaker system

Item # 108PERF600

Infinity's flagship Kappa Perfect Series speakers look so good and feel so solidly built that it's a shame you...

Find what Fits your car

Infinity's flagship Kappa Perfect Series speakers look so good and feel so solidly built that it's a shame you...

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Item # 108PERF600

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Expected: 10/9/2019

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About the Infinity Kappa Perfect 600

Put Perfect sound in your car

Infinity's flagship Kappa Perfect Series speakers look so good and feel so solidly built that it's a shame you probably won't lay your eyes on them again after they're installed, but it's a small price to pay to experience unrivaled audio in your vehicle. This Kappa Perfect 600 6-1/2" component system is a heart-and-soul Infinity creation, utilizing the very best technology and materials available to their engineers.

Put Perfect sound in your car

Infinity's flagship Kappa Perfect Series speakers look so good and feel so solidly built that it's a shame you probably won't lay your eyes on them again after they're installed, but it's a small price to pay to experience unrivaled audio in your vehicle. This Kappa Perfect 600 6-1/2" component system is a heart-and-soul Infinity creation, utilizing the very best technology and materials available to their engineers.

Infinity Kappa Perfect 500

Add the optional Kappa Perfect 3-1/2" midrange speaker to this system and change the crossover settings with the flip of a switch

High-definition tweeters

Prepare to hear nuance and detail in your favorite music that you never knew was there. Infinity uses edge-driven polyimide dome tweeters to achieve a frequency response up to 30,000 Hz. The "edge-driven" design creates a larger tweeter that handles more power and delivers smooth response way down into midrange frequencies as well. You'll hear a more clearly defined soundstage where you can picture the placement of every instrument.

Tweeter mounts included

While installing tweeters can sometimes prove challenging, Infinity includes versatile hardware for surface- or flush-mounting, making the job much easier in most vehicles.

Carbon fiber woofer with Plus One+ technology

Infinity uses a carbon fiber woofer that weighs less than traditional materials, so you don't need a ton of power to drive this woofer, but the oversized voice coil certainly allows for awesome power-handling if you're driving this system with an amp. Infinity's Plus One+ woofer technology extends the cone right up to the edge of the basket, giving you more surface area than with most comparable speakers. A bigger cone means more bass to complement the superior high-frequency response. The included external crossovers send the appropriate frequencies to the tweeters and woofers.

Want a 3-way Kappa Perfect system?

Infinity makes it easy to turn this Kappa Perfect 2-way component system into a 3-way system with the addition of optional 3-1/2" midrange speakers. Simply flip the switch on each Kappa Perfect crossover to a 3-way system configuration for a well-rounded sound. These speakers are sensitive enough that you can power them with an aftermarket stereo, but you'll get your best results feeding them plenty of power from an outboard amp — up to 100 watts RMS.


Product highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 crossovers
  • Plus One+ carbon fiber woofer (fits 6-1/2" and 6-3/4" openings)
  • edge-driven polyimide dome tweeter
  • mounting brackets for easier tweeter installation in factory locations
  • switchable 2-way and 3-way external crossover network in weatherproof housing
  • 3.5-ohm impedance
  • handles up to 100 watts RMS (400 watts peak power)
  • frequency response: 60-30,000 Hz
  • sensitivity: 90 dB at 2.83 volts
  • woofer top-mount depth: 2-7/8"
  • grilles included
  • warranty: 3 years
  • Our 60-day money-back guarantee
  • MFR # Perfect 600

What's in the box:

  • 2 Woofers
  • 2 Crossovers
  • 2 Tweeters (each with 10" wire attached)
  • 2 Flush mount housings
  • 2 Plastic locking nuts
  • 2 Surface mount housings
  • 2 Woofer grilles
  • 2 Woofer grille rings
  • 2 Woofer adapter brackets
  • Eight 1-1/8" Screws
  • Eight 1" Screws
  • Eight 1/2" Screws
  • Four 1/2" Flat head screws
  • 8 Speed clips
  • 4 Adhesive backed foam gaskets
  • Installation instructions

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Infinity Kappa Perfect 600 reviews

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"Perfect" Speakers

Carlos from Houston, TX on 4/14/2018

2015 Kia Optima

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If you want perfect sound, go with these Infinity kappa perfect 600. These have an amazing warm sound and very crisp in the high end. If you can fit these speakers I recommend getting them. The build quality is absolutely amazing. The things they don't show in the pictures is that these speakers have flat woven stitched tinsel leads!!! and they has also have speaker inputs that are recessed a bit so that they don't mess with putting your speakers in the hole, and also for people who are curious these are the crossover points that I got directly from infinity support. 2-way = Tweet and mid is crossed at 3.4khz 3-way = tweet - 3.4khz mid - 3.4khz down to 400hz woofer - 400hz and down all crossover points are at an 18db slope

Pros: -amazing and strong mid bass -can add a mid later on with a flick of the switch -build quality is amazing -comes with an adapter ring

Cons: -crossovers are pretty large! -tweeters flush mount is also very deep...hard to flush mount without a lot of space!

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23 of 23 found this helpful

If you want the best....

James from West Henrietta, NY on 8/23/2017

2016 Ram 1500

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I've always been a fan of Infinity for car audio speakers. This set in particular will exceed all expectations for a critical listener. I purchased two sets of these and also the 3.5" add on speakers to activate the full 3 way setup for the front sound stage! All I can say is WOW! I have never had such accuracy and depth to my systems as these speakers provide! Infinity has gone above and beyond in quality and engineering on this lineup. Though the RMS rating seems a bit on the low end, I'm pushing these with an RF Power T600. They mate very well and I'm convinced that they are being pretty conservative on their stated power range. These are HUGE by the way. I knew they wouldn't fit properly in my Ram 1500. But be creative and make them fit! The crossovers are pretty darn large as well. So the st locations within your door panel, you'd think they would fit........ they wont LOL! I mounted them within the cab and routed the wiring where they needed to go. Anyways, enough of my babble! Go get yourself a set or two of these and start experiencing REAL audiophile grade sound from your ride!

Pros: 100% flawless! Best I've ever heard!

Cons: absolutely none.

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27 of 28 found this helpful

Infinity Kappa Perfect 600

Luke from El Paso, TX on 8/13/2017

2014 Chevrolet Camaro

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Infinity speakers never let you down. Loud and crisp. Definitely recommend these speakers.



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13 of 16 found this helpful

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More details on the Infinity Kappa Perfect 600

Pat M.

Features & specs

Speaker Size 6 1/2
Design 2-way
Tweeter Design Edge-Driven Dome
Impedance (Ohms) 3.5
Tweeter Composition Polyimide
Woofer Composition Carbon Fiber
Woofer Surround Rubber
Parts Warranty 3 Years
Labor Warranty 3 Years
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 90
Frequency Response 60 - 30k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 100
Peak Power Handling (Watts) 400
Top-mount Depth (Inches) 2 7/8
Bottom-mount Depth (Inches) 3 1/4
Cutout Diameter or Length (inches) 5

Product Research


Plus One Woofer Cones: The Plus One woofer cones offer more surface area than other speakers that fit in the same size opening. This is accomplished by using a new basket design and hi-roll surround. The result is greater bass output and a significant increase in efficiency.

Terminals: The woofers' input terminals are set screws that will accept up to 14 gauge bare wire.

Woofer Size: Without an adapter, the woofers fit standard 6-3/4" applications. They will also fit in standard 6-1/2" speaker openings, but do not use the standard 6-1/2" speaker bolt pattern. In order to install them in standard 6-1/2" speaker openings you must drill new screw holes. If new holes are drilled in the mounting surface of the car, no bracket is needed. If drilling in the car is not an option, the included brackets can be used, which have standard 6-1/2" mounting holes, the Ford non-symmetric four hole pattern, and other 6-1/2" and 6-3/4" patterns. When using the brackets the depth becomes 2.643" and the mounting height becomes 0.77".

Tweeter Mounting: Using the included housings the tweeters can be flush mounted or surface mounted. The tweeter can pivot in the flush mount housing, so it can be directed to optimize imaging.

Tweeter Dimensions:

  Flush Mount Surface Mount
Mounting Height 0.473" 1.33"
Mounting Depth 1.383" screw depth
Frame Diameter 2.661" 2.25"
Cutout Diameter 2.125" N/A

Crossovers: The crossovers can be set to 2-way (the default position, for use with the included woofer and tweeter) or 3-way (for use with the included drivers plus the optional Kappa Perfect 300M midrange, sold separately). Each crossover also has a tweeter output level switch (choose between high and low output). The inputs and outputs are screw terminals that will accept bare wire or spade connectors up to 0.275" wide. There are four mounting holes in the base of each crossover.

Crossover Dimensions:

  • Length: 5-1/2"
  • Width: 7-15/16"
  • Height: 1-5/8"

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Customer Q&A

6 questions already asked

If these were to be bi-amped, what load would the amp see for each Chanel?
[ Ryan  Jun 20, 2019 ]
1 answer
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Jul 01, 2019 ]  Staff
What is the minimum RMS for these speakers? Is 150 watts RMS too much?
[ justin  Nov 19, 2018 ]
1 answer
There is no listed minimum RMS. They are efficient enough to work well off the wattage of an in-dash stereo but, like most speakers, will provide their best performance when powered by an aftermarket amplifier. 150 watts is a lot of power and well more than they are rated to handle (up to 100) but you can make it work when you set your amplifier gains correctly. For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service:
[ Ryan  Nov 24, 2018 ]  Staff
Can this system fits on my 2016 Kia Sorento LX version?, and do you know where can I pay to install it? I'm in New albany Indiana
[ Robinson  Sep 25, 2018 ]
1 answer
The woofers would fit easily into the front & rear door locations of the '16 Sorento--however the tweeters would require some work for proper fitment. To explore installation options in your area, you can use our "find an installer" search tool: You can also contact a Crutchfield Advisor directly by phone (888.955.6000) or online chat to discuss further. Thanks!
[ Larry  Sep 30, 2018 ]  Staff
What would be a couple good 4 channel amps to push two sets of these. Would they need to be 100rms each channel ?
[ Cooper  Mar 24, 2018 ]
1 answer
There are many amps that can work with these speakers to give different performance levels. Due to this fact, you will want to consult an advisor for a personal recommendation on an amp for your goals. You can call 1-800-324-9695 or use our online chat to speak with one My Bio:
[ Paul  Apr 06, 2018 ]  Staff
What do these get crossed at before and after you flip the switch?
[ DANIEL  Jan 01, 2017 ]
2 answers
Hi Daniel, This may be too late now, but I contacted infinity myself and got an answer to this! In normal two way mode the tweeters are crossed at 3.4khz In three-way mode it is the same for the tweet crossed at 3.4khz then the mid goes from 400hz to 3.4khz and the woofer goes from 400hz and down. all crossover points are at an 18db slope Hope this helps! (side note: these speakers sound AMAZING)
[ Carlos  Apr 14, 2018 ]
The crossover frequencies do not change for the tweeter output level switch. You would not use the 3-way switch without adding the Kappa Perfect 300m midrange driver which has a frequency response of 150-10,000Hz: I hope that helps, My Bio:
[ Ryan  Jan 07, 2017 ]  Staff

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