About the Infinity Kappa Perfect 300m
The Perfect companion
The Perfect companion
Turn your Infinity Kappa Perfect 2-way component system into a 3-way system with the addition of these Kappa Perfect 300m 3-1/2" midrange speakers. Infinity uses a carbon fiber cone that weighs less than traditional materials, so you don't need a ton of power to drive this speaker, 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 allows this speaker to cover effectively down to 150 Hz.
Uber-Infinity
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 speaker is a heart-and-soul Infinity creation, utilizing the very best technology and materials available to their engineers.
Grilles are not included; the factory grilles should be suitable for most applications.
Product highlights:
- 3-1/2" Plus One+ carbon fiber midrange speakers
- 3.5-ohm impedance
- handles up to 75 watts RMS (300 watts peak power)
- frequency response: 150-10,000 Hz
- sensitivity: 88 dB at 2.83 volts
- woofer top-mount depth: 1-3/4"
- grilles not included
- warranty: 3 years
- Our 60-day money-back guarantee
- MFR # Perfect 300m
What's in the box:
Infinity Kappa Perfect 300m owner's manual
- 2 Midrange speakers
- Eight 1" Screws
- 8 Speed clips
- 2 Adhesive backed foam gaskets
- Installation instructions
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More details on the Infinity Kappa Perfect 300m

Features & specs
General | ||
---|---|---|
Speaker Size | 3 1/2 | |
Design | 1-way | |
Tweeter Design | --- | |
Impedance (Ohms) | 3.5 | |
Tweeter Composition | --- | |
Woofer Composition | --- | |
Woofer Surround | Rubber | |
Parts Warranty | 3 Years | |
Labor Warranty | 3 Years | |
Specifications | ||
Sensitivity (1W at 1 meter) | N/A | |
Sensitivity at 2.83 volts | 88 | |
Frequency Response | 150 - 10k Hz | |
Minimum RMS Wattage | --- | |
Maximum RMS Wattage | 75 | |
Peak Power Handling (Watts) | 300 | |
Top-mount Depth (Inches) | 1 3/4 | |
Bottom-mount Depth (Inches) | 1 7/8 | |
Cutout Diameter or Length (inches) | 3 1/8 | |
Mounting Height (Inches) | 0.239 |
Product Research
Features
Midrange: These drivers are midrange, designed for use with the Kappa Perfect 500, 600, or 900 2-way component sets (all sold separately). The crossovers included with the component sets can be set to 3-way for use with these Kappa Perfect 300M midrange.
Mounting: Unlike typical 3-1/2" speakers, the 300M has four mounting tabs. (Most 3-1/2s have two.) When mounting in many factory speaker locations, two of the tabs will need to be removed.
Plus One Cones: The Plus One midrange 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 wire terminals are set screws that will accept up to 14 gauge bare wire.
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