Expert Service 1-877-289-7664 [Hours]

Sonic Closeout Sale

Infinity Kappa 100.9W

350W 10" Kappa Series Selectable Smart Impedance Subwoofer

In Stock
|

List price $229.95

You Save: $109.96 (47.82%)

$119.99

with warranty

+ FREE Shipping in US 48

Order within 8 hrs 56 mins to ship today

Arrives by Thursday, Mar. 5 to zip 98144

Add an Extended Warranty

SquareTrade Product Warranty
Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

In Stock

Arrives by Thu, Mar. 5

Get FAST answers from customers ASK a Question See questions answers

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.


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:

  • 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.

Product History:

Infinity 100.9W thumbnail
(newest, current model)
Infinity 102.7w thumbnail
(previous model, replaced by Infinity Kappa 100.9W)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Kappa (Infinity)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
10"
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.
1400 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.
350 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Single
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 or 4 ohms
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).
25 - 400 Hz
Sensitivity
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".
89 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
17.55 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Gold
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.
Coated Glass Fiber
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.
Rubber
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
0.75 cubic feet
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
0.75 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.50 cubic feet
Maximum Ported Box Volume
This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.50 cubic feet
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.
5-15/16"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
9-1/4"
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.

No

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
79%
4 Star
12%
3 Star
0%
2 Star
6%
1 Star
3%

Average Attribution Rating

Durability
4.6
Value
4.5
Features
4.8
Design
4.7
Usability
4.8
Adam

Sumner, WA

Overall
Durability
Value
Features
Design
Usability
Awesome sub for the price

August 16, 2014

It hits hard and looks great. The 4 to 2 ohm switch makes setting up your amp easy. I'm running it with a mono block jl 500 watt amp and outs loud and hitting great.

8 of 14 found this helpful

Was this review helpful to you?

Cab300zx

Dalton ga

Overall
Durability
Value
Features
Design
Usability
Infinity subs and speakers. Bad a** products

August 11, 2014

Love infinity products. The 100.9 is a great value and very good addition to any system they sous excellent and can handle the power. Highly recommend

7 of 12 found this helpful

Was this review helpful to you?

jeeves

North Las Vegas, NV

Overall
Durability
Value
Features
Design
Usability
high quality

September 25, 2013

have lots of experience in the car audio industry and decided to get these after doing research on what i felt would be best for my setup. My last system had 2 L7 12s but this time i was looking to conserve a little more trunk space and was looking for more quality. put this in the recommended .75 sealed enclosure powered by a polk 5 channel amp and have been impressed so far. doesn't hit the lows like my last setup but for the size this really packs a punch. One of the most accurate sounding subs ive heard. going to try it in a ported box soon to compare.

10 of 18 found this helpful

Was this review helpful to you?

J Ro

Phoenix, AZ

Overall
Durability
Value
Features
Design
Usability
High Quality Sound

September 3, 2013

I ordered two of these and built a box to Infiinty's specs with 1" MDF. These sound so great! They don't play extremely loud (powered perfectly by a Kappa One) but they blend so well with the rest of the system. The sound is clean and hard, not boomy. On that note they can handle high volume, but if you want that slammin' bass in your face feel, these aren't for you (I know these are only 10's. but I'm confident the 12's are very similar). I am an Infinity loyalist in the car as well as home, and these remind me why!

8 of 14 found this helpful

Was this review helpful to you?

darren

Catoosa, OK

Overall
Durability
Value
Features
Design
Usability
very nice

February 25, 2013

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.

6 of 11 found this helpful

Was this review helpful to you?

Jaym

St louis

Overall
Durability
Value
Features
Design
Usability
Great price on a great product

September 26, 2012

Good tight bass response, very durable, good price highly recommended.

6 of 11 found this helpful

Was this review helpful to you?

freddie

kodak, TN

Overall
Durability
Value
Features
Design
Usability
BOOM

January 1, 2012

A frind of mine has three of these in his honda civic in series and wow is all i can say. Hurry and buy now beacause these actually compare to sum of the higher end kickers ect.
Pros: they look awesome and they hitt so hard with great lows. Cons: none

4 of 7 found this helpful

Was this review helpful to you?

Skylar (Mack) Dunn

Jefferson City, MO

Overall
Durability
Value
Features
Design
Usability
one of the best SQ drivers ive heard

September 3, 2009

these thangs can get it, believe me, and they are some of the best looking cones ive EVER seen. it sounds just so good, and moves a nice amount of air. a def. 15/10.

2 of 3 found this helpful

Was this review helpful to you?

Cab300zx

Ga

Overall
Durability
Value
Features
Design
Usability
Bad a** subs

February 24, 2015

These subs have a very good sound and hit very hard. Good people to buy from

1 of 2 found this helpful

Was this review helpful to you?

Mike

North Potomac, MD

Overall
Durability
Value
Features
Design
Usability
GREAT sound

August 16, 2014

I have many years of experience in studio recording in the music industry - as a musician. So I was looking to build a system that can replicate the studio sound as best as I could to listen to a wide variety of music. I do not need thumping deep rattle the next car bass, I want clean musical sound. I have had alpine subs and those can punch and get some solid deep bass, but that was not my goal with this setup (although it can do that too, rather well). This is my 2nd purchase of this sub in a second vehicle and in both cases this has performed exactly what I needed. The sound of an upright bass sounds amazing, can easily go into the higher frequency range and make the transition from door speakers to sub seamless. I bought this sub to play anything I threw at it and do it well, not to only play one type of music all the time. Mostly Jazz, Classic Rock, Ska, 90's, Classical, Pop (wife likes that stuff..) and occasional R&B. I recommend the kappa components to go along with the sub - some say the highs are harsh, but I call it accurate and clear. This sub can do it all, I'm very happy with it.

TL;DR, get this amazing sounding sub for your setup if you want perfect sound and a strong presence. Might want to go larger than 10" or another brand if you want that deep killer decibel punch and trunk rattling bass;)

6 of 12 found this helpful

Was this review helpful to you?

Niz

Lake forest

Overall
Durability
Value
Features
Design
Usability
Sound quality sub! Clean bass

July 4, 2013

Originally I bought a kicker compr. It had really nice low bass but no mid bass at all. Returned it and bought this infinity. Running it in a .75 cu sealed boxed and it hits so clean and nice. Lows are loud and clean. Also hits the mid bass with no problem.

7 of 14 found this helpful

Was this review helpful to you?

John

Fort Lauderdale, FL

Overall
Durability
Value
Features
Design
Usability
Exceptional

March 19, 2013

Great product and good looking, would buy again. Infiinty a good way to go.

7 of 14 found this helpful

Was this review helpful to you?

Dan

Bakersfield, CA

Overall
Durability
Value
Features
Design
Usability
These Infinity's are amazing!

January 6, 2013

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.

6 of 12 found this helpful

Was this review helpful to you?

mtrsprt

Sutton,NH

Overall
Durability
Value
Features
Design
Usability
High quality value, with the output to match!

April 14, 2012

Very nice quality subwoofer, at an affordable price. Build quality better than Kicker yes. I have always used Kicker subwoofers, and this time I just wanted one small 10" driver. I chose to give this Infinity Kappa 10" a shot. Just got it hooked up today, and I was blown away with it's sound reproduction and output for such a small driver. I have it in a 1.0cu ft sealed enclosure. Hits accurate, deep and tight. I have about 600rms going to it. You wont find a better sub for the price period.

5 of 10 found this helpful

Was this review helpful to you?

Sammy-d

Australia

Overall
Durability
Value
Features
Design
Usability
AWESOME if urnafter 10s' these r a great candidate

April 9, 2012

We have 3 of these puppies in our trunk and they realy kick, powered by a hifonics 1000.1d Amp @ 2 ohms. We had a reading at 132.2 db. Stoked! With the mew shipment of Vibe black AIR 6" component & Vibe 6 x 9 (Black Air) she should be pumping!!!! THANX SONIC!

4 of 8 found this helpful

Was this review helpful to you?

Tyler

Grove City, PA

Overall
Durability
Value
Features
Design
Usability
amazing clarity!

May 22, 2011

A close friend of mine just picked two if these up for his Scion tC and I have to be honest I have never heard such a good sounding sub. Definitely not the loudest but if youre looking to make music sound how it was intended to, these subs are for you!

4 of 8 found this helpful

Was this review helpful to you?

sam medina

Philadelphia, Pa

Overall
Durability
Value
Features
Design
Usability
car speakers

May 23, 2014

These speakers sound nice and balanced not to boomy but a good punchy bass and treble sound. They can handle whatever power amplification is fed to them. I would recommend them for their overall value and just crisp clear sound without the distortion.

2 of 5 found this helpful

Was this review helpful to you?

chad

Superior, WI

Overall
Durability
Value
Features
Design
Usability
Sweet Sub

April 8, 2014

Nice smooth sound comes from this amp, looks great too!

6 of 13 found this helpful

Was this review helpful to you?

Booze

Vancouver WA

Overall
Durability
Value
Features
Design
Usability
Fast and easy transaction

December 21, 2012

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

4 of 9 found this helpful

Was this review helpful to you?

Ross J.

Canada

Overall
Durability
Value
Features
Design
Usability
Last subs I'll have to buy...

November 23, 2012

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!

6 of 13 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added

Dual 10" Subwoofer Angled Truck or Hatchback Box Enclosure

CARB Compliant, 3/4" MDF Dual Enclosure Lined with Premium Carpeted Finish

Your Price $68.95

10" Subwoofer Angled Truck or Hatchback Sealed Enclosure

CARB Compliant, 3/4" MDF Sealed Enclosure Lined with Premium Carpeted Finish

Your Price $42.95

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

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $9.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $109.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

Car Stereo and Speaker Installation Tool Kit

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

Your Price $14.99

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

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

10" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

1 Infinity Kappa 100.9W Subwoofer

Mono Amp

2 Infinity Kappa 100.9W Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

3 Infinity Kappa 100.9W Subwoofers

4 Channel Amp

4 Infinity Kappa 100.9W Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp

Browse 1 question and 4 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
The carbon/kevlar/glass fiber or whatever they call it construction.
Jeff P on Feb 15, 2015
quality sub at a great price
Michael F on Nov 28, 2014
Had a JL 10w3v3 2 ohm Sub that came with a stealth box I ordered for my truck it quit working and come to find on of the wires going to the voice coil had parted near the coil without warning not even pushing the subs abilities and the RMS of the sub is higher rated than the amp also the peak power is higher than the rating on the amp. I have Infinity Kappas in all of my door and they have been amazing so I decided to go with a Infinity sub to match.
Shayne T on Feb 10, 2015
I have a 10" Infinity Kappa in another vehicle and I like it.
charles b on Aug 27, 2014

Product Summary

Manufacturer

Model Number

100.9W

UPC

050667110444

Weight

19.00lbs

Internal SKU

1009w

Internal Product ID

20026

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 100.9W

  • Infinity SSI Kappa Series Subwoofers
  • Harman International: The Pursuit of Great Sound
  • Subwoofer Size Buying Guide