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Infinity Kappa 42.9i

4" 2-way car speakers

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Item# 108429I offer details

Item# 108429I

Review Summary

 
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Infinity

Our take on the Infinity Kappa 42.9i

by Kristen Schaub

Infinity built the latest Kappa speakers with improved technology and high-end materials to provide you with outstanding sound reproduction. The low-impedance design makes these speakers very efficient, so you'll get great results powering them with a factory or aftermarket stereo.

The Kappa 42.9i 4" speakers feature light, but stiff woven glass-fiber woofer cones that won't flex or distort. The Plus One design offers a larger surface area for improved low-frequency output and efficiency, while longer voice coils produce tighter, snappier midbass. Large magnets keep the woofers running cooler by placing more steel close to the voice coils to act as a heat sink.

Infinity uses the same Metal Matrix Diaphragm tweeter found in many of their popular home speakers, so you'll hear the music the way it was recorded with minimal coloration or distortion.

The computer-optimized outboard crossover networks employ audiophile-grade components to separate highs and lows, so that the woofer and tweeter work together perfectly. Pre-wired crossovers eliminate a time-consuming step in your installation, and terminals at the end of the crossover wires screw directly to the speakers, leaving no chance for incorrect wiring.

Important Note: These Infinity Kappa speakers use a low impedance design to pull more power safely from your car stereo or amplifier. This design is compatible with virtually all factory and aftermarket stereos.

Installation Note: These Infinity speakers do not include screws or speed clips. You may be able to use the factory screws to install them, but it's always a good idea to have an assortment of self-tapping screws (5/8" to 1") and speed-clips on hand.

Highlights:

  • 2-way 4" speakers (pair)
  • True Four Ohm Impedance technology: speaker's 2-ohm impedance combines with speaker wire impedance for a 4-ohm load
  • compatible with virtually all factory or aftermarket car stereos
  • Plus One® woven-glass-fiber woofer cone with hi-roll rubber surround
  • 1" edge-driven M.M.D.® dome tweeter
  • computer-optimized outboard crossover with tweeter level control
  • direct-connect crossover dongle
  • power range: 2-50 watts RMS (150 watts peak power)
  • frequency response: 75-25,000 Hz
  • sensitivity: 93 dB
  • top-mount depth: 1-7/8"
  • warranty: 3 years
  • Our 60-day money-back guarantee
Shop all Infinity 4" Speakers
     

    Hands-on research from the Crutchfield Labs (what are the Labs?)

    Features and Specs

    Features and Specs
    General
    Design
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    2-way
    Tweeter Design
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    Dome
    Tweeter Composition
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    MMD
    Woofer Composition
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    Woven-glass fiber
    Woofer Surround
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    Hi-roll rubber
    Parts Warranty
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    3 Years
    Labor Warranty
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    3 Years
    Specifications
    Sensitivity
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    93.1 dB at 2.83 volts
    Frequency Response
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    75 - 25k Hz
    RMS Power Range (Watts)
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    2-50
    Peak Power Handling (Watts)
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    150
    Impedance (Ohms)
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    4
    Top-mount Depth (Inches)
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    1 7/8
    Bottom-mount Depth (Inches)
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    N/A
    Cutout Diameter or Length (inches)
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    3 1/2

    Product Research

    Product Research
    What's in the box?

    Download owner's manual

    • Two 2-way speakers
    • 2 Grilles
    • 2 Grille rings
    • 2 In-line crossovers (attached)
    • 2 Adhesive backed foam gaskets
    • Instructions
    • Warranty information

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Features

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

    Woven Glass Fiber Woofer Cones: This woven-glass-fiber material is very light and extremely stiff, minimizing cone flex. This results in very low distortion and improved clarity.

    Edge Driven MMD Dome Tweeters: Each speaker has an Edge-driven MMD (Metal Matrix Diaphragm) dome tweeter. The benefit is increased power handling and reduced distortion at high output. This technology also allows for better integration with the mid/woofer.

    High-Output Design: The high output 2-ohm voice coil design compensates for the high in-line resistance of small gauge factory wiring and extracts every watt from factory receivers, increasing overall system output and efficiency (relative to 4 ohm speakers). The speaker's 2.0-ohm impedance combined with the impedance of your speaker wire provides a true 4-ohm load to your connected headunit or amplifier. The speakers also benefit from increased power when you upgrade the wire and add aftermarket amplifiers, designed to power a 2-ohm load.

    Crossovers: Kappa speakers include computer-optimized, voice-matched crossovers, using audiophile quality air core inductors and polypropylene capacitors. The crossover slope is 12 dB/octave.

    Crossover Connections: Each crossover is connected to the speaker by a 6" wire. The input terminals are set screws that will accept up to 10 gauge bare wire.

    Crossover Dimensions:

    • Length: 3-1/16"
    • Width: 1-1/4"
    • Height: 1-3/16"
     

    Product Reviews

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    Reviews for the Infinity Kappa 42.9i

    Average Customer Review:

    7 people say:

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    Showing: 1-7 of 7
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    2 out of 5

    Kappa 6 x 8

    Written By TonyP, So Cal on Thursday, June 14, 2012
     
    Great sounding speakers when they stay on...worked for 1 week and then cut out. sub was still playing but no speakers. I guess these speakers need to be sheilded from the door metal, but that would still have soem of the power going to the speaker frame.
    Pros:
    Good sound
    Cons:
    For the cost they should make the connectiosn a little better, might og bought a different brand if I had known one or two of my new speakers woul dbe grounding out to the door...
    Was this review helpful?    Yes | No
     
    5 out of 5

    great sound, minor issues.

    Written By adam c, woburn, ma on Sunday, May 20, 2012
    Installed in a 1997 Saab 9000
    Crutchfield Customer Review (What's this?)
     
    I purchased these for my saab 9000 and they do sound great with my alpine deck. after a week of working fine my deck came up with "dc error." Meaning that one of the speakers was grounding out. to my relief it was the front left, one of these 4"ers and not the 6x9's in the back which were a p.i.n.t.a to install. there was no obvious flaw in the speaker to be fixed so i coated the mount on the car with liquid electrical tape which i allowed to dry and then installed the speaker with nylon screws. That done, these speakers contribute to a great sound system. they are clear and accurate without being tinny, the kapa 6x9's in the back fill in the sound nicely and eventually i will install my sub and amp to really achieve full resolution.
    Pros:
    great sound, easy to work with.
    Cons:
    speaker grounded out as installed per the directions, but adapt and overcome i say.
    1 out of 1 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    4" infinity kappa

    Written By JeepJockRich, Cinnaminson, NJ on Sunday, April 01, 2012
    Installed in a 1998 Jeep Wrangler
    Crutchfield Customer Review (What's this?)
     
    I put the Kappa's on the back of my rollbar in my jeep wrangler using Verspods enclosures. They sound AWESOME !!!!! It really adds to the bass as well. I can totally feel the music. KATTY PERRY sounds so good now cruising with my top down. I now have a total of 12 Infinity speakers in my jeep and it sounds like a concert hall even with the top off at 65MPH.
    1 out of 2 people found this helpful
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    4 out of 5

    Good if you have a subwoofer

    Written By Ben, Ripon, WI on Saturday, June 11, 2011
    Installed in a 1996 Saab 9000
    Crutchfield Customer Review (What's this?)
     
    I bought and installed these speakers, 6x9 infinity kappas, and a kenwood head unit in Aug '10. They installed ok (save for 1 major problem that I will get to) and sounded really good, except that the bass was just not there. I could turn up the bass output and bass boost from the head unit, but still it just lacked that little bit of bass.

    The major problem that I had with the setup was that the head unit would go into protect mode way too often. I had no idea why. Today I went to a local car stereo installer, the Exclusive Company, and they diagnosed the problem: Infinity Kappas will ground out when they are installed on a metal bracket. They told me that they have people come in all the time with Infinity Kappas and they always have the same problem.

    With the addition of a decent but not overpowering subwoofer in the trunk the setup of a matched set of Inifinity Kappas sounds AWESOME!
    4 out of 5 people found this helpful
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    5 out of 5

    decent replacement part for old jeeps

    Written By DP, WRJ, Vt on Sunday, September 05, 2010
    Installed in a 1974 Jeep CJ5
    Crutchfield Customer Review (What's this?)
     
    I chose these strictly based on size, but they sound good for such a small diameter speaker. I put them in the dash of a '74 cj5. Had to modify the mounting a bit because the speaker's pattern is a bit short of the stock dash mounting studs. The chunky terminal block/crossover was a slight hassle in such a limited space.
    6 out of 6 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    great clarity

    Written By TRACY, miami fl on Monday, January 19, 2009
    Crutchfield Customer Review (What's this?)
     
    these speakers offer great clarity
    6 out of 16 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Amazing

    Written By Andrew, Marion, IA on Tuesday, January 06, 2009
     
    The Kappa 42.9I's offer incredible sound reproduction, my car came factory with 2 pairs of 4" speakers and a pair of 8" woofers, when shopping for 4" speakers to replace the factory speakers I knew I couldn't go wrong with anything from Infinity's Kappa series. And I was right.

    Incredible highs and surprisingly good lows and mids.

    For pure enthusiasts looking for perfect imaging, consider getting a pair of these custom molded into your dash for a center channel effect, you CANNOT go wrong with the sound that these produce. Simply amazing.
    13 out of 16 people found this helpful
    Was this review helpful?    Yes | No
     
    1-7 of 7

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    SquareTrade Warranty 3 Year Warranty
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    Rated 5-stars by consumers

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