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Infinity Kappa Perfect 12.1

12" 4-ohm subwoofer

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  • Infinity Kappa Perfect 12.1

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Item #: 108PER121
 

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Our take on the Infinity Kappa Perfect 12.1

by Guest Writer
Infinity

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Got enough juice? Get an amp for your new sub The Infinity Kappa Perfect 12.1 12" subwoofer joins together a rugged aluminum cone and high-roll butyl-rubber surround to produce impressive bass all the way down to 18 Hz. The ultra-rigid woofer cone won't distort (even when you push it to the max), but it's light and responsive for remarkably high sensitivity. That means it'll squeeze the most volume out of the power you feed it.

The massive cast-aluminum basket and the pole-piece are vented, so the 4-layer voice coil stays cool when the music gets hot. Infinity subjects these subs to the most intensive testing in the industry — 100 grueling hours of performance at their full RMS rating (350 watts).

The Perfect 12.1 bridges the gap between subs intended for SPL and those intended for sound quality, creating bass that hits hard and sounds great. Whether you're planning a competition system or just looking for powerful bass, this sub's ready for action.

Details:
  • 12" 4-ohm subwoofer
  • aluminum cone with high-roll butyl-rubber surround
  • massive cast-aluminum basket
  • suitable for free-air use (handles up to 175 watts in free-air applications)
  • power range: 75-350 watts RMS (1,400 watts peak power)
  • frequency response: 18-200 Hz
  • sensitivity: 96 dB
  • top mount depth: 6-1/8"
  • sealed box volume: 1.0 cu. ft.
  • ported box volume: 1.75 cu. ft.
  • Recommended Q-Logic Box Type: 1, 2, 3
  • warranty: 3 years

Priced per speaker

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Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Size
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12 -inch
Impedance
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4 ohms
Cone Material
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Aluminum
Surround Material
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Butyl rubber
Ideal Sealed Box Volume (cubic feet)
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1
Ideal Ported Box Volume (cubic feet)
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1.75
Port diameter (inches)
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4
Port length (inches)
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12.33
Free-Air
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Yes
Dual Voice Coil
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No
Sensitivity
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96 dB at 2.83 watts
Frequency Response
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18 - 200 Hz
RMS Power Range (Watts)
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75-350
Peak Power Handling (Watts)
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1400
Top Mount Depth (inches)
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6 1/8
Bottom Mount Depth (inches)
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6 7/8
Cutout Diameter or Length (inches)
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10 15/16
Vas (liters)
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83.28
Fs (Hz)
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23.32
Qts
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0.44
Xmax (millimeters)
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14.15
Parts Warranty
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3 Years
Labor Warranty
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3 Years
Product Research
What's in the box?

Download owner's manual

  • One 12" woofer
  • 1 Self-adhesive foam gasket
  • Instructions
  • Technical Data sheet
  • Warranty card
  • "Infinity" sticker

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Enclosure Compatibility

Features

Curvilinear Aluminum Cone: The curvilinear aluminum cone is lightweight and extremely rigid for low distortion and superior bass response.

High-roll Butyl Surround: The high-roll butyl surround damps cone resonance and ensures longevity.

Cast-Aluminum Basket: The non-resonant cast aluminum basket ensures perfect alignment of the speaker's moving parts.

Flat Uniform-roll Spider: The spider design provides maximum control over cone motion at the limits of the speaker's excursion, and reduces even-order harmonic distortion compared to cupped spiders.

Vented Pole Piece: A flared, polished and vented pole piece is used to provide optimum cooling of the voice coil and minimize turbulence.

1.5" 4-layer Voice Coil and Stacked Magnets: The 1.5" 4-layer voice coil and stacked magnets provide high motor force and room for ultra-long excursion.

Gold-plated 5-way Binding Posts: The gold-plated 5-way binding posts will accept pin connectors, spade connectors, banana plugs, dual banana plugs, and bare wire.

Enclosure Compatibility

Recommended Sealed Box Volume: Infinity recommends a sealed enclosure with an internal volume of 1.0 cu/ft.

Recommended Ported Box Volume: Infinity recommends a ported enclosure with an internal volume of 1.75 cu/ft. One 4" diameter x 12.33" long port should be used with a 1.75 cu/ft enclosure.

Recommended Sealed Bandpass Box Volume: Infinity recommends a bandpass enclosure with an internal volume of 3.45 cu/ft. The 3.4 cu/ft enclosure should have a sealed chamber volume of 2.2 cu/ft and a ported chamber volume of 1.25 cu/ft. One 4" diameter x 10.7" long port should be used in the ported chamber.

Free-air Mounting: In addition to being compatible with sealed, ported and bandpass enclosures, the woofer can be used in free-air applications. A free-air subwoofer is designed to be mounted on a baffle board, which separates two areas of the vehicle. For instance, you could mount this woofer to a board attached to the rear deck or placed in the trunk against the rear seat. The trunk acts as the enclosure housing the subwoofer.

 
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Infinity Kappa Perfect 12.1 Reviews

Average Customer Review:

51 people say:

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Filter by rating:
5 out of 5

Excellent Sub

Written By Ernie, TN on Sunday, June 09, 2013
 
Replaced Kappy 12" with a JLW6v2. Ran JL for about 5 years and thought that it was the best untill its foam surround ripped. I reinstalled Kappa in same ported box. Infinity sounds just as good as the $350 JL, even at 4ohms. Kappa is at least 9 years old and sounds as good as new.
Pros:
Cost, build quality, real RMS and MAX power numbers, long life. In a ported box it will vibrate your neighbors.
Cons:
Aluminum cone is easy bent
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"Coolness Factor"
Build Quality
Ease of Use
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Value
 
5 out of 5

wow!

Written By Dominic, Marysville, MI on Sunday, February 17, 2013
 
I got one of these and it slams!
Pros:
Good sound,looks nice
Cons:
None
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"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 
5 out of 5

Amazing

Written By Mb8, Baton Rouge, La on Friday, August 10, 2012
 
I really think this is the best sub ever made. It can handle unbelievable amounts of power but doesn't need much. It has a remarkable build quality which allows it to sound very musical whyle still thumping in your chest. OUTSTANDING subwoofer wish they still built them to this quality!!!!!
Pros:
Is a Musical Sub Highest sensitiveity on a Subwoofer I've ever seen Can handle huge amounts of power (but doesn't need much) Built to last (I've had mine over 8 years)
Cons:
None
1 out of 1 people found this helpful
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"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 
5 out of 5

Still alive and kicking since 2005

Written By Andy N, Stanton, CA on Friday, November 11, 2011
 
Everyone thinks I have 2 12's in the back of my 4Runner when I only have one. I got the DVC version and added a terminal cup to my sealed box. Hooked it up to a Stereo amp with 350 RMS. The Kappa is at 375 RMS. I bought this back in 2005 and it still sounds as rich and deep as when I it was first broken in. If set up correctly, this thing works wonders. Roll down your windows and you'll annoy your neighbors.
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"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 
5 out of 5

INFINITY PERFECT 12,GREAT SPEAKER

Written By Big D, Westport,Ma. on Sunday, March 20, 2011
 
I have owned my infinity perfect 12 since 1998 yes '98' when i bought my jeep
wrangler, both my jeep and sub are still going strong,It is mated with a 600
watt bridged amp. The sub is in a sealed box sitting in back near the
tailgate,with infinity 5 1/2's in the sound bar,polk audio 4x5's in front with a
panasonic 45 watt head unit.I
have never had it full volume as the stereo volume goes up to 40, i play it around
20,(half,)as i like to keep my hearing, and the soft top looks like it's
breathing.Great and reliable product.
2 out of 3 people found this helpful
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4 out of 5

Infinity Kappa Perfect 12.1

Written By David, philip sd on Monday, February 26, 2007
Crutchfield Customer Review (What's this?)
 
these subs are the best i had two of these in a s10 regular cab with a rockford amp. these subs are some fing loud. i swear you cant blown
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5 out of 5

Best of the best

Written By JC, Rapid City, SD on Tuesday, February 13, 2007
 
I have had many systems in my 1988 Bronco II, but this is hands down the best sub I've owned. My setup right now is my 1000W Kenwood Excelon Amp with 1 12, 1 Kicker CVR Dualcoil 12, and my 2 Infinity 12s. With this setup in a custom sealed box radiates some intense bass. But the infinites are the heart of it all. Under 1000W they'll be hearing you a block away. Both quality and quanity with these. Rockford doesn't hold a candle!
1 out of 1 people found this helpful
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5 out of 5

The perfect pair of subs

Written By Mark, Plymouth, MI on Saturday, February 03, 2007
Crutchfield Customer Review (What's this?)
 
I bought two of the 12.1's for my Eclipse Spyder. I have them in a dual 1.25 ft3 sealed enclosure which takes up every last bit of trunk space. When the volume is turned up the canvas top puffs in and out to the bass and its clearly visible from outside the car. I'm powering them with an MTX 81000D which is too much power but I havent blown them yet. I have heard a wide range of subwoofers from Rockford 12's to MTX 15's and Perfects while not louder than the 15's sounded much cleaner. If you can get these 2 for 1 then they are an awsome value. Even at full price they are reasonable.
3 out of 3 people found this helpful
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5 out of 5

...and I can still hear my music

Written By nic, Jay, ME on Thursday, February 01, 2007
 
I have one of these in a basic sealed enclosure with a two channel power acoustic amp. This is my second setup, with my first being a powered bazooka tube. This is way better. I don't know how it would be in a vented enclosure and i don't care because i hate them. Sealed is the way to go. The sound quality is very good if not amazing, and the loudness is perfect in relation to the interior speakers. If you actually care about what your music sounds like, i highly suggest this sub; if your only interest is attracting attention from OUTside your car, well.... just get a second one and put them in a vented enclosure, but then the inside sounds retarded and gives you headaches. And to add to the great sound, it is clearly a high quality constructed speaker. Very nice surround, I love that high roll rubber. Buy It!
1 out of 2 people found this helpful
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5 out of 5

Perfect

Written By James, Columbus, MS on Wednesday, January 31, 2007
Crutchfield Customer Review (What's this?)
 
The name says it all. Its the best bang for the buck.
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5 out of 5

High quality, great value and low price.

Written By Tim, Jersey on Wednesday, January 31, 2007
Crutchfield Customer Review (What's this?)
 
I got two kappa perfect 12.1's powered by an alpine mrd-m1005 in a q-logic box. these subs produce wonderful sound quality and they kick pretty well. these subs represent the best value on the market when looking at quality subs.
I just can't wait to here this setup with my interiors installed with the new amp.

GET THESE!
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5 out of 5

Bang for the buck

Written By Aaron, Phoenix, AZ on Monday, January 29, 2007
 
I purchased two Infinity Kappa Perfects about a month ago and very pleased with the way they perform. When the subs hit they hit hard and clean. Ive had tests with various "bass" cd's and they've never missed a beat! Every hit was precise, and for the price you cant get a better buy.
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5 out of 5

These subs are awesome

Written By Jim, Southwick, MA on Saturday, January 20, 2007
Crutchfield Customer Review (What's this?)
 
I bought these subs a couple of months ago. I am very happy with them. They are very crisp in sound and they hit hard.
1 out of 1 people found this helpful
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5 out of 5

Great Subs For The Money

Written By Tom, Almont, MI on Sunday, January 07, 2007
 
I bought these subs. I am running them w/ an Infinity 611a amp and they hit hard. I have them in a 98 sebring lx coupe. The bass is nice and clean. I highly recommend these subs to anybody who wants hard hitting bass for under $200
1 out of 1 people found this helpful
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5 out of 5

Infinity Kappa Perfect 12.1

Written By dhicks, Smithfield, NC on Saturday, December 30, 2006
 
Picked up 2 on sale and built a 2 cu/ft box out of MSD plyboard and powered by a 920 watt kenwood and theses things BEAT. They're sitting in the backseat of a Explorer Sport Trac and they sound excellent. They bottom out a little but not enough to change the sound outside. Hit very clean and very hard. A very good buy.
1 out of 1 people found this helpful
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5 out of 5

Nice

Written By Tremain, Louisa, VA on Wednesday, December 27, 2006
 
These are some a nice subs, they sound good and hit hard. A great buy for the money.
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5 out of 5

Between Infinity and Boston Acoustics I made a good choice.

Written By apple, Tucson on Wednesday, December 27, 2006
Crutchfield Customer Review (What's this?)
 
Infinity Kappa Perfect 12.1 and the Kenwood KAC-9102D are a match made in heven. I also needed an amp that would compliment the sub and good old kenwood had th eperfect amp. These subs creat such wonderful bass, not the kind that makes ou sick, or give you a pounding head aches for hours but the kind that is rich with clarity, with smoothness that is refreshing, it make syou want to listen to it louder and louder. No matter what music I through at them the delivered, from rap, classical, newage, and vocals you name it. Just get them you will not regrete them, and turn them up when you get them.
2 out of 2 people found this helpful
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5 out of 5

Better than what I thought

Written By Matt, Pittsburgh, PA on Monday, December 18, 2006
Crutchfield Customer Review (What's this?)
 
I was looking for a system to install in my 2005 Jeep Grand Cherokee and I called crutchfield. I talked to Lucy and she told me that this sub was great and how could I complain about the price. I have it hooked up to a Audiobahn 375 watt mono amp. The subs hit great on both highs and lows. If you have a Jeep and it has a amp in it you have to run wires from the cars amp to the head unit so that it will turn on. The customer service was great. I would suggest that if you call in ask for Lucy she knew what she was talking about and got me a great system at a great price!

Thanks Crutchfield

Matt
4 out of 4 people found this helpful
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5 out of 5

These sucker hit hard

Written By George, Ceres,Ca on Sunday, December 10, 2006
Crutchfield Customer Review (What's this?)
 
These suckers hit hard. They get loud and low. I have 2 of these subs connected to a crappy Sony Xplod amp. I plan on buying another pair so I can connect the 4 subs to my Kicker KX1200.1. I cannot wait..
3 out of 4 people found this helpful
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5 out of 5

99 out of 5 Stars

Written By akord_king, Columbia Falls ,Mt on Friday, December 08, 2006
 
i bought 2 of these i build a 2.4 cu/ft sealed box 4 them also at the moment i dont have an amp to power them to there full potential im only pushing 120 rms at 2ohm into each sub AND THEY POUND i CANT BELEIVE IT i only have the amp gain at 1/5 they way up currently im breaking them in but THEY POUND louder then anything ive seen (or heard) i cant even picture how loud they are gonna be when i start pushing 300rms into these beasts I HIGHLY RECCOMEND THIS SUB OVER ANYTHING UNDER $300 THESE THINGS POUND WITH QUALITY TOO THERE ARE COMPLETELY JAW DROPPING!!!!!!
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5 out of 5

absalute BASS and CRISP sound

Written By Anonymous, Silver City, NM on Tuesday, December 05, 2006
 
I GOT TWO OF THESE SUBS ABOUT 4 MONTHS AGO AND I BARLEY PUT THEM IN MY 97 DODGE AVENGER AND ITS NOTHING BUT GREAT BIG BASS AND CRISP SOUND.I HAVE THEM ON A ROCKFORD FOSGATE 600 WATT 2 CHANNEL AMP.I USED TO HAVE 2 12INCH SUBS AND THOSE ARE NOTHING COMPARED TO THESE SUBS I (HIGHLY RECOMMEND THESE SUBS) AND YOU CANT BEAT THE PRICE, WORANTY,AND THE GREAT LOOK AND SOUND OF THESE SELF SELLING SUBWOOFERS.
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5 out of 5

perfect

Written By roscoe, St. Helen, MI on Saturday, November 25, 2006
 
Let me start by saying that ive been into car audio since 1998 and ive had a lot of different set ups. I bought a couple of these perfect 12's over the summer and they r really nice. I installed them in my 01 silverado reg cab with the Q logic truck boxes. I run them with a JL 500/1 and they r very loud and clean especially on very low notes. They hit the entire scale though and sound almost hollow or ghostly on the high notes. They make ur ears wet. If u try to run too much bass they will pop and distort but when used as they should be they r awesome. Like i said ive been bumpin since 1998 and i remember when these speakers were around three hundred bucks a piece. The sub these remind me of is the old round solo baric as far as build quality and power handling. I would say these sound better though and r probobly the best sub crutchfied has unless u want to ruin ur ears with thousands of watts. Almost perfect subs, awesome
5 out of 5 people found this helpful
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5 out of 5

Perfect blend of bump and sound quality...Bang for your buck!

Written By Michael, Sharon,MA on Thursday, November 16, 2006
Crutchfield Customer Review (What's this?)
 
I bought these subwoofers for the extended cab of my 1998 Ford Ranger. I have them running with an Alpine MRD-M605 600Watt amplifier and I could not be happier. I was looking for subs that could give me the perfect blend of bump when I wanted it, but also sound good with alternative, and different types of rock. For the price, these subs are unbeatable. I could not be happier with my purchase. I threw together an excellent system for only $1500 and it sounds great. I highly recommend these subs if you are like me and you want bump when you need it, but not your other stuff drowned out.
3 out of 3 people found this helpful
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5 out of 5

Kryp Sub!

Written By Trevor, Kula,Maui,HI on Wednesday, November 15, 2006
 
I bought these subs when they had he 2 for 1 offer. This has to be a great deal. I am powering one of the subs with a JBL GTO755.6 II with channels 5&6 bridged. I have the sub in a Q-Logic QLH-1.7512SS ported. This sub play great for any type of music. I listen to rap, reggae, trance, and most types of music. Its great for the price and hits super hard. Its a great sub for the price and is my first and must say it is Awesome!
2 out of 2 people found this helpful
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5 out of 5

Stellar performance from a great value!

Written By Bryce, Eden Prairie, MN on Wednesday, November 08, 2006
 
I have one 12" 12.1 infinity kappa perfect in a 1.25 cubic ft rear-firing sealed box with a 1" layer of poly-fill. I am running 700 watts rms and 1440 peak to it via a US Acoustics 800F amp bridged and a 20 farad tsunami capacitor. I have heard quite a few different subs in my day, and I have never experienced a sub with such sonic accuracy. I enjoy all types of music, and this usually creates a problem with most subs. Either they can't handle the sustained deep bass from classical music or can't keep up with the kick drum from speed metal. This sub plays clearly no matter what I throw at it. I can't wait to get another one!
2 out of 2 people found this helpful
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5 out of 5

6 OUT OF 5 STARS

Written By Kevin, Burbank, California on Monday, September 11, 2006
 
These r the loudest cleanest nicest subs ive ever owned. Ive got 2 of these running off of a Infinity Ref. 611a mono amp (657 RMS @ 2 ohms... 456 RMS @ 4 ohms) with 4 guage power wire/ground wire and a 2 farad compacitor. The subs r in a 1.25 cubic ft (per sub) sealed box in the back of my Explorer. And these things r LOUD. Ive only had um for a week... and they r not even broken it yet but dude they r LOUD and EXTREMELY CLEAR. Beats all of my friends sub systems in both clarity and loudness. Subs could easily out-perform subs that cost twice as much. After hearing these... im soon going to purchase 2 pairs of Kappa speakers and get a Infinity 4 channel amp to run to them... Its gonna be LOUD.

Highly recommened :)

4 out of 4 people found this helpful
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5 out of 5

INFINITY, THE NAME SAYS IT ALL!

Written By Alejandro, TEXAS on Saturday, August 26, 2006
Crutchfield Customer Review (What's this?)
 
I BOUGHT TWO OF THESE SUBS TO COMPLETE MY SYSTEM IN MY JEEP LIBERTY. THESE SUBS SOUND GREAT TO ANY TYPE OF MUSIC. PEOPLE ALWAYS TURN TO LOOK WHEN ON THE ROAD BECAUSE THE SUBS HIT HARD. IF YOU LIKE TO EXPIRENCE YOUR MUSIC, THESE SUBS ARE FOR YOU. GREAT BUY.
2 out of 3 people found this helpful
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5 out of 5

Great Subs!

Written By Manu, OB,FL on Saturday, August 26, 2006
 
These subs were an upgrade from the reference series I had previously blown after constant use. These positively hit harder but require a bit more power. I have a Kenwood deck w/ a 500 RMS 2 Ohm Profile amp and a 1 farad cap setup. The Kappa Perfects make my truck battery dip a lot under heavy usage unlike the previous references. The references are really good but these Kappa Perfects are great and you can't beat the warrantee.
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5 out of 5

great subs

Written By Mark, mc farland wi on Wednesday, August 23, 2006
 
the reviews say it all! these are great subs for the price ...Plus shipping was free!
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5 out of 5

Wow

Written By Richard, Bham, AL on Friday, August 18, 2006
Crutchfield Customer Review (What's this?)
 
So i bought these subs because i couldnt pass up the great deal on them. they were purchased to replace 2x polk db 12's that i blew with my new TMA 1000 mono block (a real amp compared to some of the people on leaving reviews) anyway i got these subs and boy do they do the job....i took it to a competition and they hit 153 decibles in my s10 haha
1 out of 6 people found this helpful
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5 out of 5

Infinity Kappa Perfect 12.1

Written By nick, CA on Friday, August 11, 2006
 
If you have ever had Infinity Kappa Perfect speakers (Subwoofer or Component sets) you know they are the best of the best. I have never been disappointed with Infinity line of speakers. I'm going to next try their amplifiers both 2 and 4 channels in my new ride. Also 3 year warranty on the Kappa line. Who can beat that. Also remember to buy from only a authorized Dealer. I strongly recommend you plan out you system before buy anything. It will help you out in the long run. Thats about it.
2 out of 2 people found this helpful
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5 out of 5

Amazing.

Written By Ed, Little Falls, NY on Wednesday, August 09, 2006
Crutchfield Customer Review (What's this?)
 
I have a pair of these Infinity Kappa Perfect 12.1 Woofers in a sealed box powered by a MTX 5601 Amp. They are both getting 300 watts, and let me tell you, they sound amazing. They sound very tight and solid, and also produce more then enough bass for my needs. I could not be happier, highly recommended!
2 out of 2 people found this helpful
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2 out of 5

loud but fragile

Written By Rob, Niagara Falls, NY on Thursday, August 03, 2006
 
I had two of these subs with an amp that matched the rms perfect. after a few months of nice hard basss, the voice coils burned and came unattched from the cone. i like the subs but the voice coils need work, and as i read on here i am not the only one who experienced this.
1 out of 2 people found this helpful
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4 out of 5

Infinity Kappa Perfect 12.1

Written By Royce, Tampa, FL on Tuesday, July 25, 2006
 
I have 3 of these in my car and while there are more louder subs out there for more money these subs produce very tight, accurate, clean bass. I believe they can handle more power then Infinity says they can handle I have taken them to their max rms and beyond and they handle it no problem. I have had Crunch, Rockford, Kicker and many more and these are right up there in the running. If you want clean tight accurate bass then these are the subs for you.
1 out of 2 people found this helpful
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5 out of 5

Infinity Kappa Perfect 12.1

Written By Drew, Las Vegas NV on Tuesday, July 18, 2006
 
i've had these subs for a couple months now, and have loved every minute of it. i was skeptical when i saw that they were more of a SQ sub rather than an SPL sub, but all my concerns were RIGHT out the window, this sub is LOUD and gets loud with very few watts. im running them in a (me built) 1.27^3 sealed chamber(each) and have beaten out systems pushing 6x my watts. HIGHLY recomend this sub to ANYONE wanting a hybrid sub of SQ and SPL.
-Drew
3 out of 3 people found this helpful
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5 out of 5

This baby thumps

Written By Jason, Southern Tier, NY on Monday, July 17, 2006
Crutchfield Customer Review (What's this?)
 
Phenomenal service from Crutfield on this one. I have my Perfect 12.1 in a Scosche EFX sealed box and it sounds amazing in my Explorer. The other thing I love is how little space it takes up in my cargo area compared to the amount and range of bass I am getting from it. I have it hooked to the bridged rear channel of an Infinity 7541a amp with 12 ga speaker wire.
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5 out of 5

Amazing Build Quality

Written By Scott, Portland, OR on Sunday, July 16, 2006
Crutchfield Customer Review (What's this?)
 
I ordered two of these off Crutchfield and they had 1 in stock so they sent me that one and backordered another. They told me it would ship early July. I received it on June 23, coincidentaly my birthday. Best gift i got by far. The first thing you notice after taking them out of the box is the build quality. props 2 the guys @ Infinity, a truly beautifully constructed sub. Cleanest ones out there IMO. Put them in my ported 1.65 cf each box with 12 oz. of polyfill in each side. Powered by my Polk/MOMO C500.1 (500w @ 2 ohms) they are already hitting pretty hard and the sq is ridiculous on reggae, hip-hop and classic rock. I had that amp for my old 10's and i need a new bigger amp because me and the subs are begging for it.
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5 out of 5

TWO WORDS LOUD CLEAR

Written By matt, Florida on Tuesday, July 11, 2006
Crutchfield Customer Review (What's this?)
 
Alright, i got the subs in a sealed box with 1.25 cubic ft. airspace in each chamber. i'm running an alpine mrd-605. this amp tested at 662 rms in 2 ohms, i've got 4 guage RF comp. wire and an optima yellow-top, and of course a dynamat trunk, and let me tell you, this setup is the best i have had and blows away most! actually i haven't heard anything better yet! i've got 4 alpine type S speakers, 6 1/2" and the alpine CDA-9851 head unit. i turn it up to 18 out of 35 and you feel the pressure of the bass pushing on your ears. my rear-view vibrates so bad after one hit of bass i'm staring at my backseats. i stop at a stoplight and everyone else's rear-view's shakes froma bout 50 feet away. these baby's are insane!!! and talk about quality, i know systems, and designs these are the best i've seen yet!! durable, heat-reducing, and they handle anything you throw at them, turn up ur bass lower and louder, they just ask for more!!

of course you should already know this if you know alpine and infinity products!
1 out of 2 people found this helpful
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5 out of 5

awesome sub

Written By diymiser, Duanesburg, NY on Tuesday, June 13, 2006
Crutchfield Customer Review (What's this?)
 
I have 2 of the 12.1's in a sealed box in an escort wagon powered by a massive audio p1000.1 running at 2 ohms getting approx. 270 watts each. They are in my opinion the best all around sounding sub I've heard, tight accurate bass, low too. There are louder subs out there, but most are muddy and lack accuracy. You hear ALL the lows and they are defined with these puppies. I've had kicker comp 10 and 12 , polk ex 10 , orion xtr 12, alpine type s 12 and there is no comparison.
4 out of 4 people found this helpful
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5 out of 5

Infinity Perfect, Description says it all.

Written By johnnyblue211, Clermont, Fl on Saturday, April 01, 2006
Crutchfield Customer Review (What's this?)
 
I had these subs for 2 years and they pounded hard. Perfect is the most perfect word to describe these speakers. I sold them 6 months ago and have regreted it everytime I hear his car go by. Now I am thinking about buying another set. Irony sucks. Guy won't sell them back. LOL! Can't blame him.
2 out of 4 people found this helpful
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5 out of 5

Perfection

Written By Dark Specter, New York on Thursday, March 02, 2006
 
When I hooked up this bad boy to my Hifonic zeus amp (bridged) Q-logic 1.75 costom made ported 2 1/2'' poly filled box firing towards the cabin. It was just like the Kappa perfect 6 1/2 speakers I have, just purely wonderful. It hits so low and loud that my girl friend heard me a mile away. This sub was the main attraction at a car show I was at and there was some great set ups there. All in all if you want a sub you can push and it says no and blurs your eyes and pushes back this is it, perfect for Hardcore rap and metal and lets not forget Nora jones.

5 out of 5 people found this helpful
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5 out of 5

Amazing Sub!!!

Written By Scott, Danville, CA on Sunday, February 12, 2006
Crutchfield Customer Review (What's this?)
 
Ths sub is incredible. I have had it in my car for two days and in sounds amazing. I have it in a 1.0 cubic ft Q-Logic box and it is powered by a Rockford Fosgate Punch P4002 amp running in bridged mode at 4 ohms. This sub hits extremely hard and i haven't even pushed it to max volume or max bass boost and my friends say that they can hear me from around the corner. If you are looking for a great sub that hits hard this is the sub for you.
3 out of 3 people found this helpful
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5 out of 5

Its all in the name- Infinity

Written By Landon, Memphis, Tennessee on Monday, January 16, 2006
 
I have two 12.1 Perfect subs in a sealed 1.0 each box. They are fed by an AP2000 Profile amp which feeds them about 320 RMS. They arent fully broken in yet but they still slam in the back of my 1992 4Runner. They hit extremly low and I havent been able to get them to distort yet. My eardrums would blow before I could get them to... Awesome subwoofers!
4 out of 5 people found this helpful
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5 out of 5

Infinity Kappa Perfect 12.1

Written By jlweing, Fort Collins, CO on Tuesday, December 27, 2005
 
This sub is by far the best I have ever owned, I have one of these in a 1.0 cubic feet Q-logic sealed box and its being powered by a Sony amp that puts out 280 watts rms. It hits extremely accurately and LOUD, and it goes really deep. The sub has far exceeded my expectations in terms of sound level as well as quality. I would buy another one if I had the trunk space, highly recommended!
2 out of 2 people found this helpful
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5 out of 5

If you liked the old Kappa, you'll love the Perfect!

Written By Raymond, Smithfield, RI on Thursday, September 15, 2005
Crutchfield Customer Review (What's this?)
 
I purchased 2 of these subs over a year ago to replace the old Kappa green cone subs I had. I tried some other manufacturers at first, but no other could match the Infinity sound, nor handle the power, they just cost more! I currently use an MTX 1500 watt mono amp to drive the Kappa Perfect subs in a 2.25 cuft total ported enclosure (you'll have to play around with port tuning in an enclosure this small depending on your vehicles interior size). They are wired in parallel for 2 ohms (single voice coils) I've driven these subs to there full potential and beyond, without any problems (with a 20hz subsonic filter). They don't loosen up or loose control even after repeated torture! These subs are far superior to the last generation sub, and they are very friendly with rap and metal music (the can play hard and low no problem). I'm still using the same subs I purchased over a year ago. The suspension is still stiff, and there is no fading or cracking of the cone or surround. This proves that price does not dictate quality, only the product in question can. I hope this can help you !
15 out of 15 people found this helpful
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5 out of 5

Simply Amazing!

Written By Alex, Long Island, NY on Thursday, June 23, 2005
Crutchfield Customer Review (What's this?)
 
When I recieved this sub and looked at it for the first time, I said "Wow!" It looks very awesome and is great quality. The aluminum cone is very strong and the rubber surround is very strong as well. When I mounted it into a 1.0cf enclosure I built with 1 inch polyfill on the walls and then juiced it up with 225 watts from a Profile AP1040, the sound I heard was unbelievable! This sub put out an intense amount of bass. The bass was extremely clear and accurate. Overall, I am very happy with this sub and reccomend it highly.
5 out of 5 people found this helpful
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5 out of 5

Spend the extra $$....get this sub!!

Written By Matt, Tinley Park, IL on Saturday, April 23, 2005
 
I replaced a smaller JL Audio sub with this one in a larger 1.75 box. It is powered by a 280 watt MTX Thunder amp. At first, I thought I would want to take the port out of the box. 15 minutes later, after fearing for the glass in my truck, I re-sealed the box. It produces very tight, controlled, and seemingly limitless bass. I have had JL audio subs and Bazookas before. This was a huge improvement!!
11 out of 11 people found this helpful
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5 out of 5

Perfect Name for the Perfect Sub :)

Written By JayBright, Pittsburgh, PA on Wednesday, March 02, 2005
 
I have had this sub a little over 4 years. Still sounds like day one! Hits very Low and very hard. Have an MTX Amp driving it around 300watts in a sealed box and the sound is great.
13 out of 15 people found this helpful
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5 out of 5

Infinity Perfect 12

Written By Josh, Flora, Illinois on Saturday, February 19, 2005
 
I have had this sub for a few weeks and after break in I can't believe the sound from this driver. It is being powered by a MTX 502 amplifier. (bridged) It plays very low and loud. It is housed in a 1.75 cf slot vented enclosure. The sub is built very well. It has a very large spider and magnet assy. Out of at least 50 subs I have tested, this is definatly the cleanest and lowest playing sub I have ever heard. Enjoy!
23 out of 24 people found this helpful
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5 out of 5

Amazing

Written By scott, Fort Worth, TX on Saturday, February 19, 2005
 
I've had this subwoofer since last Christmas and it hasn't failed me yet. Once it was broken in, it hit as hard and as precise as any other comprable subwoofer. My friend had an R12 and it broke within a year, while my Perfect has yet to show any sign of slowing down. It is good for any type of music, rap, rock, etc, and I would personally recomend it to anyone in the market for a QUALITY 12 inch subwoofer.
20 out of 21 people found this helpful
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5 out of 5

Infinity 12.1

Written By Mr. Conweezy, Chicago, IL on Tuesday, February 15, 2005
 
I had this sub for a year until it got stolen and it was the most quality sub Ive ever heard with no distortion at high volumes, great sub!
111 out of 141 people found this helpful
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Add accessories for the Infinity Kappa Perfect 12.1

Reduce ambient road noise and your vehicle's "rattles," for better sound inside your car. See all categories & accessories

Dynamat Xtreme Trunk Kit 5 sheets, 20 square feet
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Dynamat 19100 License Frame Kit
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Speaker Grilles (12" waffle style)
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Polyester Fiber Stuffing Make your subwoofer think it's in a bigger box (1-pound pack)
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Grille Clamps (Front/top mount clamps)
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Metra Speaker Terminal Square terminal cup with spring clip connectors (for do-it-yourself box builders)
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Metra Speaker Terminal Round terminal cup with spring clip connectors (for do-it-yourself box builders)
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For a more in-depth review and enhanced detailed information on the Infinity Kappa Perfect 12.1, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_108PER121/Infinity-Kappa-Perfect-12-1.html ).