Previous page Infinity 63.9i: main picture thumbnail Infinity 63.9i: alternate picture thumbnail Infinity 63.9i: alternate picture thumbnail Infinity 63.9i: alternate picture thumbnail Infinity 63.9i: alternate picture thumbnail Next page

Infinity Kappa 63.9i

6-1/2" / 6-3/4" 3-way Kappa Series Coaxial Car Speakers

  • 4.8

(24 reviews)

Read 24 reviews

Write a review

The product on this page is discontinued.

Will this fit my car?

Select Vehicle >

Specials with this product

  • Free Ground Shipping to the 48 statesdetails

Why Shop Sonic?

SONY Marine Gear Giveaway

Customer Testimonial

Great service. Would recommend to anyone.

- Steve from Hickory, NC

See more…

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:

  • 6-1/2" Kappa Series Car Speakers
  • Power Handling:
    • Peak: 450 watts per pair / 225 watts each
    • RMS: 150 watts per pair / 75 watts each
  • Woven glass fiber cone woofer
  • Rubber surround
  • 1" Edge-driven MMD (Metal Matrix Diaphragm) dome tweeter
  • UHF super tweeter allows for frequency response as high as 30000 Hz
  • Computer optimized voice-matched passive crossovers with audiophile-grade air core inductors and polypropylene capacitors
  • Adjustable tweeter level (-3 dB, 0, +3 dB)
  • 2 ohms impedance
  • Top-mount depth: 2-5/16"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Pair

Product History:

Infinity 63.9i thumbnail
(newest, current model)
(previous model, replaced by Infinity Kappa 63.9i)

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

Speaker Specifications
Speaker Size 6-1/2" (also mounts in 6-3/4" w/ included brackets)
Design 3-way
Tweeter Design Dome
Tweeter Composition Metal Matrix Diaphragm
Woofer Composition Woven Glass Fiber
Woofer Surround Rubber
Peak Power Handling 225 watts
RMS Power Handling 75 watts
Sensitivity 95 dB
Frequency Response 45 - 30000 Hz
Impedance (Per Voice Coil) 2 ohms
Top-Mount Depth 2-5/16"
Cutout Dimensions 4-5/16" x 4-5/16" 
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 63.9i
Average Customer Rating is 4.8 out of 5 stars:
  • 4.8
based on 24 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
75%
4 star:
.
.
25%
3 star:
.
0%
2 star:
.
0%
1 star:
.
0%
what's this?
Average Attributes Rating:
Durability
  • 4.8
4.8
Value
  • 4.8
4.8
Features
  • 4.8
4.8
Design
  • 4.8
4.8
Usability
  • 4.8
4.8
what's this?
Most Helpful Customer Reviews:
February 14, 2013 kappa 63.9i
Review by
kj from omaha, NE
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 4.0
Easy to install and comes with hardware, grills mounting brackets for different sized openings and instructions. Kappas sound great at a great price.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
January 23, 2013 Fantastic
Review by
Andrew from CT
Overall
  • 5.0
Durability
  • 4.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I bought 2 pairs of these speakers too install in my 2000 Jetta as my first upgraded sound system. It was super easy and fast considering i did it myself. They sound FANTASTIC, better than my friends 50,000$ Audi. Unfortunately the front door speaker blew the first day. But it was my fault because I had the music way too loud. But i just called Harman and they replaced it quickly and without question. HIGHLY recommended as upgrade.



However if you want to get the best out of these speakers you will need an amp. I just installed an infinity 4 channel amp and the difference is astronomical. Buy these.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
October 9, 2012 Infinity 63.9i 5/5
Review by
Blake from Hendersonville, TN
Overall
  • 5.0
Durability
  • 4.0
Value
  • 4.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Wow! 5/5 Stars. That is how I would describe this product. I have had the speakers 6 months now and they are still booming! These speakers can go so loud so clearly. No distortion from what I have heard. I have 2 pairs of these running on a Boston Acoustic GTA-704. 70 watts RMS each and they are pummeling. They have surprisingly good bass, too. If you want crystal clear, loud music, I definitely recommend these speakers. If you want your ears to bleed, buy them!
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
August 8, 2012 awesome deal
Review by
SNUKIE from San Antonio,TEXAS
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Great crisp sound but even better deal. Would've paid double the price.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
July 29, 2012 outstanding speakers
Review by
Paul from White Hall, MD
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I installed them on my Harley FLHT. At 70 mph I can fire them up and they are loud and clear. So far they have preformed flawlessly.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious
View All 24 Reviews for Infinity Kappa 63.9i
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.
$17.95
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?
Speaker Baffles for your Speakers Speaker Baffles for your Speakers
Enhance the sound of your speakers with these easy to install speaker baffles.
$9.99
1/2" Depth Extender for 6-1/2" Speakers 1/2" Depth Extender for 6-1/2" Speakers
Need just a little more room to install your new speakers? These 1/2" spacers are just what you are looking for.
$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-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: 63.9i
UPC: 050667110055
Weight: 9.00 lbs
Internal SKU: 639i
Internal product ID: 13447