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Infinity Kappa 42.9i
4" 2-way car speakers
Our take on the Infinity Kappa 42.9i by Crutchfield's 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.
these speakers offer great clarity
TRACY, miami fl
What's in the Box:
- Two 2-way speakers
- 2 Grilles
- 2 Grille rings
- 2 In-line crossovers (attached)
- 2 Adhesive backed foam gaskets
- Warranty information
- 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
Infinity Kappa 42.9i Reviews
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Features and Specs
|Woofer Composition||Woven-glass fiber|
|Woofer Surround||Hi-roll rubber|
|Parts Warranty||3 Years|
|Labor Warranty||3 Years|
|Sensitivity (1W at 1 meter)||N/A|
|Sensitivity at 2.83 volts||93.1|
|Frequency Response||75 - 25k Hz|
|Minimum RMS Wattage||2|
|Maximum RMS Wattage||50|
|Peak Power Handling (Watts)||150|
|Top-mount Depth (Inches)||1 7/8|
|Bottom-mount Depth (Inches)||N/A|
|Cutout Diameter or Length (inches)||3 1/2|
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.
- Length: 3-1/16"
- Width: 1-1/4"
- Height: 1-3/16"
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 verify what’s in the box, 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.
Product reviews from the Crutchfield Labs
by Robert Ferency-Viars
Infinity Kappa is Infinity's high-performance line of car speakers. They're designed and built to give you excellent sound, especially in an amplified system.