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  • Infinity SSI Kappa Series Subwoofers
  • Subwoofer Size Buying Guide
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Infinity Kappa 100.9W

10" Selectable Smart Impedance Kappa Series Car Subwoofer

  • 4.6

(23 reviews)

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$229.95

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$159.95

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Infinity subwoofers have always distinguished themselves clearly from the competition. The Infinity SSI Kappa series subwoofers are no exception and fight on a playing field all their own. Right away the coated glass-fiber cone shows off an air of sophistication and style while offering incredible rigidity that minimizes distortion.

Once you get past the cultured exterior, the interior components uphold Infinities affinity for advanced technology. This Kappa sub utilizes a triple voice coil system which gives it the incredible ability to offer selectable impedance. Selectable Smart Impedance (SSI) technology allows this sub to run at 2 Ohms or 4 Ohms with the flick of a switch. This allows you to extract the most from your subwoofer amplifier in any situation. If you decide to add a subwoofer down the line, SSI makes it easy to reconfigure your entire system without buying different subwoofers or amplifiers.

The SSI Kappa subwoofers handle a remarkable amount of power and sound incredible in sealed or ported enclosures. If you want great sounding bass with unheard of wiring versatility, Infinity Kappa subs are technologically advanced enough to handle it.

General Features:
  • 10" SSI Kappa Series 2 Ohm or 4 Ohm Subwoofer
  • Power Handling:
    • Peak: 1400 watts
    • RMS: 350 watts
  • Impedance: Selectable 2 or 4 ohms
  • Coated glass-fiber woofer cone
  • Thick rubber surround
  • Selectable Smart Impedance (SSI) lets you set the subwoofers impedance with the flip of a switch
  • Cast aluminum basket with voice coil vents
  • Triple voice coil technology
  • 2" Voice coil diameter
  • Rubber boot surrounds the magnet structure
  • Frequency response: 25-400 Hz
  • Sensitivity: 89 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
Package Includres:
  • 100.9w SSI Subwoofer
  • Foam Mounting Gasket
  • 3mm Hex Wrench
  • Owner's Manual
  • Technical Data Sheet

Learn more about the 100.9W at our blog.

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

Subwoofer Specifications
Subwoofer Series Kappa
Subwoofer Size 10"
Peak Power Handling 1400 watts
RMS Power Handling 350 watts
Voice Coil(s) Single
Impedance (Per Voice Coil) 2 or 4 ohms
Frequency Response 25 - 400 Hz
Sensitivity 89 dB
Xmax (millimeters) 17.55 mm
Subwoofer Design Round / Circle
Main Cone Color Gold
Woofer Composition Coated Glass Fiber
Woofer Surround Rubber
Subwoofer Grille No
Re-Cone Kit Available No
Recommended Enclosure Specifications
Recommended Enclosure Type Ported / Vented
Sealed
Minimum Sealed Box Volume 0.75 cubic feet
Maximum Sealed Box Volume 0.75 cubic feet
Minimum Ported Box Volume 1.50 cubic feet
Maximum Ported Box Volume 1.50 cubic feet
Top-Mount Depth 5-15/16"
Cutout Diameter 9-1/4"
Shallow Mount Installation No
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 100.9W
Average Customer Rating is 4.6 out of 5 stars:
  • 4.6
based on 23 Reviews
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Rating Distribution:
5 star:
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.
 78%
4 star:
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 13%
3 star:
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 0%
2 star:
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 4%
1 star:
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 4%
what's this?
Average Attributes Rating:
Durability
  • 4.5
 4.5
Value
  • 4.4
 4.4
Features
  • 4.7
 4.7
Design
  • 4.6
 4.6
Usability
  • 4.8
 4.8
what's this?
Quick Comparison:
Most helpful favorable review vs. Most helpful critical review
Most Helpful Customer Reviews:
March 19, 2013 Exceptional
Review by
John from Fort Lauderdale, FL
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Great product and good looking, would buy again. Infiinty a good way to go.
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February 25, 2013 very nice
Review by
darren from Catoosa, OK
Overall
  • 4.0
Durability
  • 4.0
Value
  • 4.0
Features
  • 4.0
Design
  • 5.0
Usability
  • 4.0
the sound quality is very very wonderful that these subs produce. they look very nice and the 3 voice coils is nice. the only bad thing is that the magnet is so big that they wont get very loud at all at 350 rms a piece. they need more power than 350 rms apiece but i dont know if they are capable of handling more.
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January 6, 2013 These Infinity's are amazing!
Review by
Dan from Bakersfield, CA
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I had one Kicker CVT10 2 Ohm speaker for a year, it was a good subwoofer, generally i liked it. Until my box rattled and it was too small for the sub and it was bouncing because of the screws. I went ahead and built another box and put in two of these subs in. What a difference, they don't hit much harder because the same amp is being used - a 400 watt rms kicker mono amp. They are much better sound quality wise, they are so much cleaner it is amazing. They also hit lows the Kicker never responded to. The difference is clear. For ten dollars per sub more, these subs are superior to the kicker.
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December 21, 2012 Fast and easy transaction
Review by
Booze from Vancouver WA
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Purchased the Kappa 100.9 for a project vehicle I have one installed and tested Not running a lot of power yet this sub for its smaller size sounds GREAT Cant go wrong with this one
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November 23, 2012 Last subs I'll have to buy...
Review by
Ross J. from Winnipeg, Canada
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
Powering a pair of these with a Kappa 4 in bridged mode. Used the Infinity specs to build a ported enclosure and it turned out perfectly. Loud, crisp, clear - everything I was shooting for. Had to remove the back seat in a extended cab GMC to make room for the enclosure, but well worth it. The drive to and from work is now an awesome experience that I look forward to each day. I am just wowed with how the system turned out. Accurate reproduction is what these subs are all about. Probably not suited for rap thumping, but for my classic rock line-up -- couldn't be happier!
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View All 23 Reviews for Infinity Kappa 100.9W
Empty Enclosures
Every subwoofer needs an enclosure to mount in and these high quality boxes are perfect for your new woofer! After a quick installation, you'll be ready for some real bass in your car!
  Product Price Add?
Sealed Subwoofer Enclosure Sealed Subwoofer Enclosure
Single sealed 10" hatchback enclosure made from 3/4" MDF construction and covered in gray carpet. 		$37.99
Subwoofer Grilles
Protect your subwoofer while making your enclosure look great! These subwoofer grilles are the perfect addition to your new subwoofer.
  Product Price Add?
10" Universal Subwoofer Grille 10" Universal Subwoofer Grille
Protect your subwoofer with this aluminum grille that is simple to install. 		$18.99
Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
  Product Price Add?
15 ft. of 12 AWG StreetWires Speaker Wire 15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer. 		$24.99
20 ft. of 12 AWG Kicker Speaker Wire 20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation. 		$39.95
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
  Product Price Add?
Dynamat Rubber Roller Dynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat! 		$18.99
Dynamat Xtreme Trunk Kit Dynamat Xtreme Trunk Kit
Get better sounding bass from your new subwoofer with enough Dynamat Extreme for your entire trunk. 		$93.99
Bass Reconstruction Processors
These sound processors are perfect for enhancing the lower frequencies of a car audio system. After some installation and tuning, your new system will sound better than ever!
  Product Price Add?
The Epicenter by AudioControl (Gray) The Epicenter by AudioControl (Gray)
The original bass booster expander with included remote will enhance the bass of your new system. 		$159.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
  Product Price Add?
20 oz. Bag of Poly-Fil 20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system. 		$5.99
16 oz. Can of Adhesive Spray 16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles. 		$5.99
Binding Post Terminal Cup Binding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure. 		$4.99
Banana Clip Terminals Banana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection. 		$4.99
Installation, Tools & Accessories
Don't forget to get the tools and accessories that will help you install your new subwoofer in your vehicle. Whether you opt for the professional installation card or the do-it-yourself method, you will need the following to help you out!
  Product Price Add?
Car Stereo and Speaker / Subwoofer Installation Tool Kit Car Stereo and Speaker / Subwoofer Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more. 		$14.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
  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
Main Product
  Product Price Add?
Infinity 100.9W Infinity Kappa 100.9W $159.95

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: Infinity
Model number: 100.9W
UPC: 050667110444
Weight: 19.00 lbs
Internal SKU: 1009w
Internal product ID: 20026