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Infinity Kappa 682.11cf

6" x 8" / 5" x 7" 2-Way Kappa Series Coaxial Car Speakers

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List price $279.99

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with warranty A Pair

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Arrives by Wednesday, Aug. 5 to zip 20147

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Get a Free Speaker Installation Kit with Purchase! $35 Value

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Infinity Kappa 682.11cf



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NVX Speaker Installation Kit


Special Price $0 ($34.99 if purchased separately)

NVX Speaker Installation Kit

• Everything You Need for a Smooth Speaker Install
• NVX SDSK2 Sound Dampening Speaker Kit
• Two 10" x 10" Pieces
• NVX SDRLR1 Sound Dampening Rubber Roller
• Scosche TK12 Complete Car Stereo Tool Kit
• Includes Wire Stripper/Cutter, Screwdriver, RCA Cable Runner, Panel Removal Tool, Test Light, and other Installtion Accessories

(Offer 1 of 1)

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You Save $34.99

Also Available as Open Box (Like New) CLICK HERE

High Fidelity Kappa Series

The 2-ohm nominal impedance of the Infinity Kappa 682.11cf coaxial speakers allows compensation for any added resistance in thin factory-installed speaker wiring and provides more output than factory speakers in its class. The high sensitivity of the Kappa Series makes it ideal for upgrading a factory-installed systemís existing speakers with very noticeable fidelity improvements. With a modern look, articulate highs and strong lows, the Kappa series speakers are perfect for any factory or aftermarket sound system. Pick yours up today at!

The Sound of quality

Sonic Electronix, one of the leaders in car audio, recently visited Harman, the premium global audio and infotainment group, at their research and development locations in Northridge, California and Detroit, Michigan. The purpose of these visits was to utilize and combine the powerful brand of Harman and the industry leading knowledge behind Sonic Electronix to begin working together on developing future car audio projects.

General Features:

  • 6" x 8" / 5" x 7" Kappa Series 2-Way Car Speakers
  • Power Handling:
    • Peak: 600 watts per pair / 300 watts each
    • RMS: 200 watts per pair / 100 watts each
    • Recommended Minimum Power: 25-150 watts each
  • Carbon Injected Glass Fiber cone material
  • Plus One cone technology offers more cone area than other speakers in its class
  • Rubber speaker surround
  • 1" Soft Dome edge-driven Fabric tweeter construction
  • Adjustable, 0 or +3dB push-button tweeter level attenuation control
  • UniPivot tweeter allows you to aim the tweeter at the listener for better imaging
  • High temperature voice coil reduces distortion
  • Vented magnet and motor assembly cool the voice coil
  • Gold-plated, screw-type speaker terminals for a secure connection
  • Injected Carbon Glass Matrix (iCGM) speaker frames
  • High-quality passive crossover components
  • Protective magnet boot cover
  • 2 ohms impedance
  • Frequency response: 40-25,000 Hz
  • Top-mount depth: 2-3/8"
  • Sensitivity: 94dB
  • Authorized Internet Dealer
  • 3-year Manufacturer's Warranty

Priced Per Pair

Product History:

Infinity 682.11cf thumbnail
(newest, current model)
Infinity 682.9cf thumbnail
(previous model, replaced by Infinity Kappa 682.11cf)

Speaker Specifications

This is the manufacturer product line of speakers.
Kappa (Infinity)
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
6" x 8" (also mounts in most 5" x 7" locations)
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Tweeter Size
Refers to the size of the tweeter. Typically, smaller tweeters produces less output with higher frequency response.
Tweeter Composition
Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Carbon Composite
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
300 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
100 watts
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
94 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
40 - 25000 Hz
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
2 ohms
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Bottom-Mount Depth
The depth when installed from the bottom of the mounting surface. Measured from the bottom of the speaker's magnet to the top of the mounting holes on the rim of the speaker.
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
4-7/8" x 7-1/8" 
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

Warranty and Return Policy

Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


gallatin, TN

Very dynamic, clear speakers

March 8, 2014

I have 4 of these in my 05 Mazda 3 hatch. (although I only use the front two) I am using a Rockford Fosgate P1000X5 set to 4 channel to power them. After properly setting my gains, I went back lowered my crossover point to around 60hz. These speakers go loud without clipping and distorting. The bass is enough to where I only have to turn my sub up slightly to hit the really deep notes. I've heard that Infinity Kappas have weak midbass and overpowered high's. While the latter may be partially true, I can testify without a doubt that these have fantastic midbass when tuned properly and some deadening on the doors. Now, speaker of the latter... the highs are quite "bright". You certainly will not have to use the +3 db button located on the tweeters. I had to turn the highs way down on my AudioControl EQS to get rid of the ear piercing highs these speakers produce. (very loud *tsst tsst tsst* and over pronounced "s" sound in vocals) This is my only negative comment about these speakers. Well worth the money. Power them right and give them a snug enclosure type setting in your doors and they will sing for you. Very happy customer.

27 of 49 found this helpful

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Killer sound

March 27, 2015

Sound is great. Easy install super happy. Crystal clear sound. The guys at sonic kick azz. Great shipping. Thanks guys.

17 of 32 found this helpful

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Baltimore, MD

Infinity Kappa 682.11cf

February 19, 2015

These speaker's makes my Grand Marquis sound like I have a top dollar system in it.. I have them powered by a rockford fosgate amplifier the recommended wattage & they handle well no distortion the mids, highs & low's sound great, waaaaay better than factory. I would definitely recommend these to anyone, they are worth every penny.

20 of 39 found this helpful

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New Albany, IN

the quality you would expect from infinity

October 21, 2013

these 6 by 8 sounds exceptionally clear and crisp. A very high quality speaker. my only concern is that they do not come with speaker grills.needed them in my application I was able to acquire online generic one but I would absolutely buy these again even considering this fact. Thank you to Sonic for excellent shipping and a good price as always.

24 of 47 found this helpful

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Kent, WA.

Great Sound!

June 22, 2014

Had some old beat speakers in my Super Duty and they desperately needed to be replaced. So I turned to Sonic after looking at some reviews, and purchased two sets as I have own some other Infinity speakers in the past. I am not a stereo installer but these are so easy to install anyone with basic hand tools and a little know-how. They sound great, and I couldn't be happier!

22 of 45 found this helpful

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New Mexico, NM


October 6, 2013

Much improved over OEM; Im running stock stereo and no amp.
They seem to sound better when playing a CD over radio.
Hopefully an amp will help them recognize full potential.
(2011 Crown Victoria, Front mounted)

20 of 41 found this helpful

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Orient, OH

Great sound for the price

November 2, 2014

I bought these for my 2002 Mercury Cougar and now have four infinity speakers in it (Infinity Reference in the front). These kappas replaced the Rockford Fosgates that were in the car when I bought it. They blow the Fosgates out of the water in almost every way. The kappas feel much more durable and well made, look more attractive and most importantly sound much better. I can actually feel the music from the back. I have them wired to my amp (and of course have the tweeter button on) and it makes them sound amazing giving them the power they need. Unfortunately one of the 4 channels on my amp doesn't work so one of them is sitting silent until I get a new amp. But even with only one rear speaker working, my music still sounds 1000x better and louder. I listen to a very wide range of music from the heaviest metal to the bassiest rap and they respond very well to anything. Personally I love the way they sound playing rock/metal, but they also have a great bass response for the rap I listen to. I don't think there's anything you can throw at them that they couldn't handle. I bought these for a much lower open box price, but having heard them now, I would absolutely pay full price for them.

24 of 50 found this helpful

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Los Angeles, CA

Great Overall Speaker!

October 14, 2014

Using in a 2006 Ford Focus SE . Fit the OEM location Perfectly . I've yet to hook these up to an amplifier - planning on the NVX JAD800.4 - but the sound GREAT with the power from my SONY XAV602BT . The speakers provide great overall performance. Its frequency range is very clear and are a HUGE upgrade from OEM.

23 of 48 found this helpful

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Arlington, WA


May 2, 2014

They sound great in my F350 Crew Cab. Worth the extra $$

27 of 57 found this helpful

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kenosha, WI

excellent speaker

December 31, 2014

i usually buy separate component speakers for good stereo separation but got sick of fixing bad wiring after years of use. so i purchased these Infinitys. they are so crisp and mids are great you will need a subwoofer thou because there more of a mid to high range speaker. the high end is ear persing I will be buying another set for the rear speakers.

23 of 52 found this helpful

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Rydal, GA

Perfect Fit/Sound for my explorer.

September 17, 2013

These speakers are a perfect fit for my 1997 Ford Explorer Sport in the front and rear housings. Being able to rotate the tweeters so that they are pointing the the proper direction was a bonus.

22 of 50 found this helpful

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Accessory Tools and Products

Accessories added

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $44.95

Belva 23 ft. of True Spec 12 Gauge Speaker Wire

100% Copper Clad Aluminum, high strand count with ultra-flexible PVC blended jacket for easy installation

Your Price $14.99

12-10 AWG Butt Connectors

These yellow butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers.

Your Price $6.99

12-10 AWG Yellow T-Tap Adapters

Allows for fast and easy splicing of wires by easily tapping into the cable.

Your Price $4.49

12-10 AWG Quick Disconnect Connectors

These yellow quick disconnect connectors make it easy to connect and disconnect speaker wire your to your new aftermarket speakers!

Your Price $6.99

NVX SDDK12 Door Kit

Eliminates speaker panel distortion and reduces door vibration, rattles and squeaks!

Your Price $49.99

Dynamat Xtreme Door Kit 10435

Enough sound dampening to cover most doors!

Your Price $59.99

Stinger Roadkill Door Kit

Use this to eliminate rattle from your doors!

Your Price $46.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $6.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

Xscorpion WDCR2 Window and Door Clip Remover

Removes and installs handle and window crank clips.

Your Price $6.99

3 in 1 Wire Quick Splice T-Tap and Butt Connector Crimper + Wire Cutter

Used for cutting copper and aluminum wires up to 8 gauge.

Your Price $29.99

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!

Your Price $7.99

Items we think you might want
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JL Audio C2-570x

• Peak Power: 225 watts each
• RMS Power: 60 watts each
• 0.75" Silk Dome Tweeter
• Injection Molded, Mica-filled Polypropylene Cone
• Top-mount depth: 2.43"
• 4 Ohms Impedance
• Sensitivity: 90.5 dB @ 1 watt / 1 meter

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Browse 2 questions and 7 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Highly rated for factory replacement for use with factory head unit, especially in newer Ford F-150.
Kevin M on Jun 25, 2015
read some reviews and will fit my vehicle.
Juan S on Mar 5, 2015
tried something new, they sound great
Brian N on Apr 14, 2015
2 Ohm, 100 RMS, BOGO
bball09 on Dec 4, 2014
I have two pairs of Infinity Kappa 682.11cf that I plan on installing in my 2007 mustang. I am looking at using a 4 channel to power them. The two that I am considering are Infinity KAPPA FOUR and the NVX JAD800.4 does anyone have any thoughts on this? I also plan on running a mono for the subs Infinity Kappa 100.9W.
Zach H on Apr 1, 2015
Infinity 682.11cf
Infinity 682.11cf
NVX JAD800.4
NVX JAD800.4
Best Answer: I have used many of the nvx products and have been nothing but satisfied. I be leave the nvx amps are underrated on the power I can't see going wrong with it
Reply · Report · justin m on Apr 1, 2015
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Product Summary


Model Number






Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Infinity Kappa 682.11cf

  • Infinity Kappa Series Speakers
  • Harman International: The Pursuit of Great Sound