About the Infinity Kappa 1200W
With their rugged construction and sophisticated engineering, Infinity's Kappa subwoofers excel in a variety of applications, equally at home in ported or sealed enclosures. These dependable subs feature switchable impedance so they'll always fit into your system, and they'll handle plenty of power so they'll deliver powerful, accurate bass. Plus, Infinity protects these subs with an impressive 3-year warranty.
Infinity's Kappa 1200W 12" subwoofer features the unique Selectable Smart Impedance design, which lets you build exactly the system you want — high-power or multi-sub — without complicated wiring. Just flip the convenient impedance switch to safely choose between 2 or 4 ohms. If you're thinking about upgrading your amplifier or adding another sub down the line, this sub makes it easy to reconfigure — and it's nearly impossible to wire incorrectly.
This sub handles plenty of power and sounds great in sealed or ported enclosures. Infinity's proprietary aero-cooling design helps keep the 2" voice coil cool. The acoustically damped glass-fiber cone minimizes distortion, giving you nothing but pure bass. And the steel basket provides a solid base for the sub, which handles up to 500 watts RMS. Infinity's Kappa subwoofers are known for their sound quality, and they offer the wiring versatility you need to build a system for your changing needs.
To drive this single subwoofer, we recommend a mono amplifier rated between 375 and 750 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.
- 12" subwoofer with selectable 2- or 4-ohm impedance
- coated glass-fiber cone with rubber surround
- steel basket
- frequency response: 23-400 Hz
- power rating: 500 watts RMS (2,000 watts peak power)
- sensitivity: 91 dB
- top-mount depth: 7-1/16"
- sealed box volume: 0.9 cu. ft.
- ported box volume: 2.5 cu. ft.
- grille not included
- warranty: 3 years
- Our 60-day money-back guarantee
- MFR # Kappa 1200W
What's in the box:
- One 12" Woofer
- Screw cover ring (installed)
- Self-adhesive foam gasket
- Owner's manual (English/ French/ Spanish/ fifteen other languages)
Infinity Kappa 1200W reviews
Awesome. I bought one from the outlet. What you get for the money is really impressive. I am very impressed with this sub so far. Easily as good as subs 2x the price.
0 of 0 found this helpful
Very sturdy materials. Clean bass in a .95cuft sealed box. Running on a Kappa k600 amp and not getting huge spl but sq is top notch. Sure with bigger ported and more power you could get some good spl with the construction of this sub.
0 of 0 found this helpful
Like infinity. ....was replacing a old infinity perfect. ....still preferred the infinity perfect but not a bad sub
3 of 3 found this helpful
Put it in my truck and now I have a ton of bass, I love it
Pros: Bumps hard like I wanted and have nothing bad to say
0 of 0 found this helpful
0 of 0 found this helpful
Super clean bass. Sounds like you spent more than you did
Pros: Sounds crystal clear.high quality construction.
Cons: Seems you have to build your own box to match cubic ft specs.
0 of 1 found this helpful
The sound quality you expect from infinity! If you build the box to the factory spec it sounds like you're running 2 12's!! I love it!!
Pros: Clean, loud, and amazing!
Cons: I didn't buy two!! The only actual con would be the lack of instruction for box spec's..
0 of 2 found this helpful
Great subwoofer for the price. I've always been an infinity fan because of the sound quality and this subwoofer delivers.
Pros: Great sound quality Great build quality Great price Legendary brand
Cons: Too much plastic
3 of 3 found this helpful
I would give these subs 6 stars if I could. These have been the best set of subs I've ever had. The quality is astounding, and they are super smooth to hook up.
Pros: Easy install, awesome quality
Cons: None what so ever
4 of 4 found this helpful
Awesome subs for the price, have 2 of em running on a kappa k1000 amp in a sealed box, very clear clean bass
Pros: Very clean and clear bass
2 of 3 found this helpful
I can say nothing negative about this subwoofer, though I didn't exactly use it in it's intended. A few months ago I was in the market for a stand alone subwoofer to couple with my new Denon receiver and the ADCOM GFA555 I picked up used in good condition. I was rather disappointed with the available selection of subwoofers on the market seeing as most are active, or ported and I am not a fan of ported bass. The only viable solution was to build one. After getting this monster from my father whom was equally interested in the project I put it in a custom built sealed Baltic birch cabinet with an internal volume of .91 cubic feet. The rest is history, coupled with ADCOM's magnificent amp in bridged mode with the woofer in it's 2 ohm configuration, it hits hard, precise, and loud. Many times when people try to adapt a car woofer into a home setting there's issues with getting the sound to properly fill the room but this sub has no issues whatsoever filling both my room and the adjacent rooms, with music, soundtracks, or whatever you happen to be playing through it. War movies sound like bombs are detonating in nearby while, Sci-Fi lasers and anti-matter bombs shake your very bones. All in all, I would recommend this subwoofer without question for almost anything.
Pros: Easy to mount Easy to wire Selectable 2 or 4 ohm impedance Mounting screw cover included for those aesthetics Also those aesthetics
Cons: More of a word of warning than a con, but when running in the 2 ohm configuration make sure you have a more than adequate amplifier with plenty of cooling especially if running said amp in bridged mode.
8 of 8 found this helpful
By far the best subwoofer for the price you could ever buy ever the quality of the craftsmanship has with standed anything at throw it at it and they hit so hard it's not necessary to even turn them up the sound quality can't be matched from any other speaker
2 of 3 found this helpful
Do not overlook these subs. I have 2 if them in a small sealed box built to 1.07 cubic feet each chamber with a hifonics Brutus 2400watt all zero gauge wiring and they absolutely pound. I can go on and on with the sub brands I have had from JL to mmats, skar,earthquake, Orion, Jvc, and all of the kappa 12s before theseunless you spend big money you won't find anything as quality as these subs. Easy to wire, don't have to spend big money on subs or an amp. They can handle what you can throw at them in thier range. SQ and SPL. Best of both worlds. I would highly recommend these subs. You will not be disappointed.
Pros: They can do pretty much anything you want them to do. Lows, mids, highs, sealed or ported, big box, small box, 1000 watt amp , 4000 watt amp, doesn't matter
13 of 13 found this helpful
Every bit as good as my type r's. When powered correctly with the propper box they get very low. For a SQ subwoofer they are loud. They will take whatever power you throw at them. Pair wonderfully with my kappa 1000w amp. Honestly this set up is as loud as my type x's were with more power. The ability to switch ohms is simply genius. Buy one and add another when needed and just flip the ogm switch. As an adult with wide musical tastes they are perfect. Put them in a small sealed box and you will get lower bass notes. 38hrtz is the sweet spot yet they still punch hard on a double bass drum peddle. Im glad i went with them over my gen 2 type r's. No distortion i even ran one at 2 ohms with 1k watts and the sub didnt even blink.
Pros: True SQ with the ability to play loud and low. As good if not better than type r's. With 1k watts this setup is as loud as my old type x's with 3k watts. Ohm selection is great. Buy one and a good amp now run 4ohms. Then save up and add a second later. You can truly build your system with this feature. They are way under rated and will take what ever amp you throw at them
Cons: None. I cant think of one and im highly critical of my music sound.
13 of 14 found this helpful
Very suprised with the power these woofers can handle. Paired two of these with the k1000 amp and it sounds great. Using a ported box.
3 of 4 found this helpful
i have used infinity as a gold go to standard for over40 years and they just get better and better , these rate on a scale of 1-10 as a 50 , infinity never fails any of my expectations since 1978 when i purchased 4 - q5's , and i still have them
5 of 6 found this helpful
Ok, I'm 40+ and competed in car stereo from 1988-2001. I've had and owned it all from McIntosh, a/d/s, Soundstream, Alpine 7909 head units, etc. I decided to toy around again with a car I once competed with: a 1990 BMW 535i. In '96 I ran a McIntosh mono amp to 3 JL Audio 12W6s (dual voice coils) in a sealed box. So so. I had planned to shock the world later with a free air/infinite baffle setup to disprove the theory that nothing compares to a box. I bought 3 JL Audio 10IB4s in 1997 when they were being discontinued. Got married, became a professional, had kids and so no more car stereo. I pulled the JLs out of storage a month ago and ran one through the center arm rest. Unimpressive, noisy and blew fast. Undeterred, I researched and researched and tried out this Infinity 12 running 2 ohms at 500x1 with a JL Audio JX500/1D tiny amp. Complete free air, through the arm rest center hole cutout. Got the JL bass knob for control. OMG. The base is so strong, so heavy and so velvety, very quick for a 12 and hits the lowest notes without a hiccup. This is not hyperbole, I went to two top shops in the city for feedback and did not open the trunk prior to demo and they were floored to see no box. Utter disbelief. I've never been happier with my low end. I really believe a 12 is the key with lots of power because using the trunk is a big box and a ten will have too much cone movement to push the air. It's pure perfection. I'm about to buy again for my Benz. RUN!!
Pros: It really works and works well Beautiful and ohms switching versatility Moves serious air with no cone noise whatsoever Very loud yet musical.
Cons: Very large speaker Requires lots of power Now I need some sound deadening work Likelihood of temporary threshold hearing loss
20 of 24 found this helpful
This sub is super impressive. I couldn't believe the level of sound that come from this thing. I have it in a .95 cubic foot sealed box being powered by the JBL Club 5501 amp, and the bass is more than the last system i had which was 2-12's in a large sealed box. In short i am impressed. I really like the simple wiring. A positive and a negative. The switch on the sub itself allows me to switch between 2 and 4 ohms very easily. No wires to switch, no diagrams, no thinking, very conveinient. It is a very sensitive sub which means to me that you get more volume and quality with lower wattages. Great buy i am happy enough with my purchase to take the time to write this review.
Pros: Handles big power. Switch between 2 and 4 ohms easily. Wiring is as simple as it gets.
Cons: None that i can think of yet. I will update if i come across any.
36 of 38 found this helpful
More details on the Infinity Kappa 1200W
Features & specs
|Cone Material||Glass Fiber|
|Ideal Sealed Box Volume (cubic feet)||0.9|
|Ideal Ported Box Volume (cubic feet)||2.5|
|Port diameter (inches)||4|
|Port length (inches)||10|
|Dual Voice Coil||No|
91 dB at 2.83 volts |
|Frequency Response||23 - 400 Hz|
|Max RMS Power Handling||500|
|Peak Power Handling (Watts)||2000|
|Top Mount Depth (inches)||7 1/16|
|Bottom Mount Depth (inches)||7 3/8|
|Cutout Diameter or Length (inches)||11 3/16|
|Parts Warranty||3 Years|
|Labor Warranty||3 Years|
Selectable Smart Impedance (SSI): A switch on the input terminal allows you to easily change the woofer's impedance between 2Ω and 4Ω settings. (The connected amplifier should be off when changing the impedance.) The power handling is the same for either setting; 500 watts RMS/2000 watts peak.
Woven Glass-Fiber Cone: The cone material is extremely stiff, minimizing cone flex; this results in very low distortion and improved clarity.
Vented Polepiece: Venting the polepiece reduces air compression under the dustcap which minimizes mechanical noise and provides more constant mechanical Q for reduced distortion.
Terminal: The spring terminals will accept bare wire up to 10 gauge.
Sealed Box: Infinity recommends a sealed enclosure with an internal volume of 0.9 ft³.
Ported Box: Infinity recommends a ported enclosure with an internal volume of 2.5 ft³ with one 4" diameter x 10" long port, resulting in a tuning frequency of 30 Hz. They also recommend using a sub-sonic filter.
Free-air Mounting: In addition to being compatible with sealed and ported 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 the front of the speaker from the back. 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. Because there is no specific volume of air to stiffen the suspension, the free-air power handling is approximately half that of the woofer in a box, in this case 250 watts RMS.
Thiele-Small Parameters: Because the woofer has two impedance settings, there are two sets of Thiele-Small parameters:
|DC Resistance (Ω)||1.948||3.858|
|Radiating Area (m²)||0.05309||0.05309|
|Motor Force Factor (TM)||11.32||15.74|
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