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Infinity Kappa 42.9I

4" Kappa Series 2-way Speakers (KAPPA42.9I)

  • 4.6

(14 reviews)

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Kappa: The Essence of Infinity

This Infinity Kappa 682.9cf is the essence and trademark of Infinity car audio. With all the high-end engineering and technology that goes into each Kappa speaker, you will sure that you are receiving only the highest quality components. Made with a woven glass fiber woofer cone, which contributes to low cone flex, low distortion, and enhanced acoustic clarity. Due to the increased power handling of the Kappa series, the Kappa 682.9cf feature edge-driven MMD dome tweeters that allow for a seamless sonic integration between the tweeter and the mid-woofer. Using the latest in loudspeaker engineering, each of the crossovers has computer optimized voice-matched outboard passive crossovers for flawless performance.

Unipivot: Staging Made Easy

The Infinity 682.9cf features a patented Unipivot tweeter design that ensures proper imaging when the speakers are installed. With the tweeter capable of being moved, it is positional and rotational even after the final screw secures the speaker in the door. Since most speakers are installed low in the door, the Unipivot design brings the soundstage up to the listener for more accurate and enjoyable experience. Each of the Kappa coaxial speakers, such as the Infinity Kappa 682.9cf feature adjustable tweeter level control. This switch will adjust the tweeters output by 3 dB. That simple tuning can make all the difference in your system and it ensures that your Kappa speakers will deliver exactly the sound that you are looking for.

True Four Ohm Technology

The engineers at Infinity have developed a speaker that works for all applications. The True Four Ohm Technology used in these speakers make it perfect for running directly of a headunit or with an aftermarket headunit and amplifier. All of the speakers in the Infinity Reference line feature a 2 ohm voice coil. However, when you factor in the small OEM speaker wire of most vehicles and the heating in the voice coil during use, the impedance actually seen by the amplifier will increase. Infinity has adjusted the speaker to be safely connected to any headunit.

General Features:

  • 4" Kappa Series 2-way Speakers
  • Power Handling:
    • Peak: 300 watts per pair / 150 watts each
    • RMS: 100 watts per pair / 50 watts each
  • Woven glass fiber cone woofer
  • Rubber surround
  • Edge driven MMD dome tweeter
  • Unipivot patented rotating tweeter allows tweeter to be directed at the listener's location
  • Direct connect computer-optimized, voice-matched outboard passive crossover for superb detail and accuracy
  • Tweeter level adjustment on tweeter by simply rotating the tweeter to add or subtract 3 dB output
  • 2 ohms impedance
  • Top-mount depth: 1-7/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Pair

Sonic Electronix, Inc. can only ship Infinity products within the United States of America.

Speaker Specifications
Speaker Size 4"
Design 2-way
Tweeter Design Dome
Tweeter Composition MMD (Metal Matrix Diaphragm)
Woofer Composition Woven Glass Fiber
Woofer Surround Rubber
Peak Power Handling 150 watts
RMS Power Handling 50 watts
Sensitivity 93 dB
Frequency Response 75 - 25000 Hz
Impedance (Per Voice Coil) 2 ohms
Shallow Mount Installation Yes
Top-Mount Depth 1-7/8"
Bottom-Mount Depth 2-1/2"
Cutout Dimensions 3-9/16" x 3-9/16" 
Speaker Grilles Yes
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Manufacturer
Customer Review Summary for Infinity Kappa 42.9I
Average Customer Rating is 4.6 out of 5 stars:
  • 4.6
based on 14 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
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71%
4 star:
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21%
3 star:
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7%
2 star:
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0%
1 star:
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0%
what's this?
Average Attributes Rating:
Durability
  • 4.8
4.8
Value
  • 4.6
4.6
Features
  • 4.6
4.6
Design
  • 4.6
4.6
Usability
  • 4.8
4.8
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
October 11, 2010 Great bang for the buck!
2 of 2 people found the following review helpful:
Review by
T. Scott from Summerville, South Carolina
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
These are great mid range speakers with one of the cleanest sounds that I have heard in a long time! The lows are typical of small speakers, but the mids and highs more than make up for it even if you don't run an amp to it.
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August 10, 2010 Fits Porsche 996 with minor modifications
2 of 2 people found the following review helpful:
Review by
Emdog from Los Angeles, ca
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Sounds a million times better than my stock Porsche 996 set up and I only had to do a little bit of modification.
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January 15, 2010 great speakers.
2 of 2 people found the following review helpful:
Review by
chazkez08 from fredericksburg, va
Overall
  • 5.0
Durability
  • 4.0
Value
  • 5.0
Features
  • 3.0
Design
  • 4.0
Usability
  • 5.0
i have a pair of these hooked up to a crunch p900.4 and they sound great. i have them set up so they have the high pass filter and they sound crystal clear. i tried letting them bump a little by switching them to no filter but they couldn't handle much. i didn't really expect much out of 4 1/2 in. speaker anyway. overall, if your looking for a decently priced speaker to fill in the highs and mids in your system, you won't be disappointed with these.
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August 6, 2012 great speakers
Review by
tyrone from Augusta, GA
Overall
  • 5.0
Durability
  • 5.0
Value
  • 4.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Easy to install, sounds great, love the way they sound.
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August 1, 2012 good value
Review by
sleeplessmbfan from Chlliwack B.C., Canada
Overall
  • 4.0
Durability
  • 4.0
Value
  • 5.0
Features
  • 4.0
Design
  • 4.0
Usability
  • 4.0
I've mounted these in the front of my 126 Mercedes, they sound good but I've noticed the plastic connection rattles inside the dash sometimes.
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View All 14 Reviews for Infinity Kappa 42.9I
Speaker Wire
Upgrade your factory speaker wire to aftermarket speaker wire and hear the difference! Using thicker gauges, newer technology, and higher quality materials, aftermarket speaker wire is key to upgrading the sound in your car.
  Product Price Add?
20 ft. of 16 AWG KICKER X-Series Speaker Wire 20 ft. of 16 AWG KICKER X-Series Speaker Wire
Get high quality sound from Kicker's twisted-pair, true to gauge speaker wire.
$16.95
50 ft. of 14 AWG StreetWires Speaker Cable 50 ft. of 14 AWG StreetWires Speaker Cable
Streetwires Super Cable provides a zero-grip insulation for a smooth install as well as true gauge twisted wire construction.
$39.99
Sound Dampening Material
Get optimal sound from your new speakers with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
  Product Price Add?
NVX SDSK2 Speaker Kit NVX SDSK2 Speaker Kit
Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!
$14.99
NVX SDRLR1 Sound Dampening Rubber Roller NVX SDRLR1 Sound Dampening Rubber Roller
Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!
$8.95
Speaker Baffles, Spacers, and Depth Extenders
Mount your speakers in the location that you need with these speaker spacers, extenders, and adapters.
  Product Price Add?
3/4" Depth Extender for 4" Speakers 3/4" Depth Extender for 4" Speakers
Add 3/4" of extra space when installing your speakers.
$8.99
Installation, Tools & Accessories
Get all of the tools and accessories to install your new speakers like a professional, or take your car to an expert and have them installed by redeeming professional installation cards.
  Product Price Add?
Car Stereo and Speaker Installation Tool Kit Car Stereo and Speaker Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.
$14.99
Door Panel & Upholstery Remover Tool Door Panel & Upholstery Remover Tool
The ideal tool for removing your car's door panels to replace you speakers!
$11.99
Universal Window Handle Remover Tool Universal Window Handle Remover Tool
Designed to easily remove the manual window handles without breaking any interior pieces.
$11.99
Universal Wire Puller & Grabber Universal Wire Puller & Grabber
Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!
$8.99
22-18 AWG Butt Connectors 22-18 AWG Butt Connectors
These red butt connectors are perfect for connecting the speaker wire when replacing your factory speakers!
$4.99
16-14 AWG Butt Connectors 16-14 AWG Butt Connectors
These blue butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers!
$4.99
Tone Generators and Sound Testing Equipment
Optimize your new system's sound quality by testing and calibrating all of your components with these items.
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.
$24.99
AutoSound 2000 CD-101 AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102 AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99

Product Summary

Manufacturer: Infinity
Model number: 42.9I
UPC: 050667110017
Weight: 4.00 lbs
Internal SKU: 429i
Internal product ID: 13961