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Infinity Kappa 52.11i

5-1/4" 2-way car speakers

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  • Infinity Kappa 52.11i

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  • Infinity Kappa 52.11i

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  • Infinity Kappa 52.11i

  • Infinity Kappa 52.11i

 

Our take on the Infinity Kappa 52.11i

by John Pollard
Infinity

Why replace your car's original speakers?

The speakers that originally came in your car were made from inexpensive materials, designed to create acceptable sound at the lowest possible cost to the manufacturer. If you love music, you deserve better. Name-brand aftermarket speakers deliver fuller, richer sound with considerably more detail and nuance, and they're capable of playing louder and cleaner than factory speakers. Connect new speakers to your factory radio and you'll get the best possible sound from your dealer-equipped system. Pair them up with a new car stereo for a level of enjoyment that can rival a high-fidelity home audio experience.

Legendary sound

Infinity's Kappa Series 52.11i 5-1/4" speakers continue in the tradition of this legendary line of speakers, offering rugged construction and impressive sound quality. Once installed, these speakes will bring out every nuance and detail in your favorite music tracks, making time spent in your car seem more like a concert than a commute.

Large soft dome tweeters

If you're looking for natural-sounding high frequencies, Infinity uses edge-driven 1" soft dome tweeters in this system. The "edge-driven" design results in a larger tweeter that handles more power and delivers smooth response way down into midrange frequencies not covered by smaller "W"-shaped domes. You'll hear a more clearly defined soundstage where you can picture the placement of every instrument.

Infinity's UniPivot design allows you to aim each tweeter toward your ears, so you enjoy excellent stereo imaging even if the speakers are mounted way down low in your doors. Each tweeter also features a level control switch so you can boost the brightness to your taste.

Glass fiber woofer with Plus One+ technology

If you like bass, the Kappa glass fiber woofer holds its shape when the power's cranked up, so you still get punchy and defined bass. Glass fiber weighs less than traditional materials, so you don't need a ton of power to drive this woofer. Infinity's Plus One+ woofer technology extends the cone right up to the edge of the basket, giving you more surface area than with most comparable speakers. A bigger cone means more bass to complement the superior high-frequency response.

Great for any system

These 2-ohm speakers are sensitive enough that you can power them with an aftermarket stereo, but you'll get your best results feeding them plenty of power from an outboard amp — up to 55 watts RMS. Grilles are included.

See more info on this item

Highlights:

  • 5-1/4" 2-way car speakers
  • Plus One+ glass-fiber woofer cone with hi-roll rubber surround
  • 1" edge-driven, soft dome tweeter
  • 2-ohm impedance
  • power range: 5-55 watts RMS (165 watts peak power)
  • frequency response: 55-25,000 Hz
  • sensitivity: 94 dB
  • top-mount depth: 2-3/16"
  • warranty: 3 years
  • Our 60-day money-back guarantee

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

Features and Specs
General
Design 2-way
Tweeter Design 1" Dome
Tweeter Composition Textile
Woofer Composition Formed glass fiber
Woofer Surround Rubber
Parts Warranty 3 Years
Labor Warranty 3 Years
Specifications
Sensitivity 94 dB at 2.83 volts
Frequency Response 55 - 25k Hz
RMS Power Range (Watts) 5-55
Peak Power Handling (Watts) 165
Impedance (Ohms) 2
Top-mount Depth (Inches) 2 3/16
Bottom-mount Depth (Inches) 2 3/8
Cutout Diameter or Length (inches) 4 11/16
Product Research
What's in the box?

Download owner's manual

  • Two 2-way speakers
  • 2 Grilles
  • 2 Grille rings
  • Eight 1-3/8" Self-tapping screws
  • 8 Speed clips
  • 2 Adhesive backed foam gaskets
  • 2 Adhesive backed Infinity logo badges
  • Instructions

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

Plus One Woofer Cones: The Plus One speaker cones offer more surface area than other speakers that fit in the same size opening. This is accomplished by using a new basket design and hi-roll surround. The result is greater bass output and a significant increase in efficiency.

Formed Glass Fiber Woofer Cones: The formed glass fiber cone material is very light and extremely stiff, minimizing flex. This results in very low distortion and improved clarity.

iCGM frames: The Kappa series speaker baskets are made of composite Injected Carbon Glass Matrix (iCGM). iCGM is lighter and stronger than stamped steel; it retains its shape, even when mounted on uneven surfaces (common in car mounting locations), plus offers exceptional damping of any resonances.

Edge Driven Dome Tweeters: Each speaker has a 1" Edge-driven textile soft dome tweeter. An edge-driven tweeter has better dispersion characteristics and allows for a lower crossover frequency than typical tweeters of the same size, which improves imaging. The result is improved vocals and musical clarity. The tweeter also has an adjustable output level, +0 dB (flat) and +3 dB.

UniPivot Tweeter: The tweeter is angled and can be rotated about 315° after installation. This allows you to direct the tweeters toward the listeners, very useful for speakers mounted low in a door.

High-Output Design: The high output 2-ohm voice coil design compensates for the high in-line resistance of small gauge factory wiring and extracts every watt from factory receivers, increasing overall system output and efficiency (relative to 4 ohm speakers). The speaker's 2.0-ohm impedance combined with the impedance of your speaker wire provides a true 4-ohm load to your connected headunit or amplifier. The speakers also benefit from increased power when you upgrade the wire and add aftermarket amplifiers, designed to power a 2-ohm load.

Terminals: The input terminals are gold-plated set screws that will accept up to 12 gauge bare wire.

Power Handling: Although Infinity lists the RMS power handling as 55 watts, they also list the recommended power range as 5-75 watts RMS. We've opted to list the more conservative 55 watt RMS figure on the specifications page.

 
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Infinity Kappa 52.11i Reviews

Average Customer Review:

22 people say:

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5 out of 5

Infinity Kappa 52.11i

Written By greg, mn on Tuesday, October 14, 2014
Crutchfield Customer Review (What's this?)
 
so far so good, these little speakers pack a punch.
Pros:
you get what's advertised
Was this review helpful?    Yes | No
 
5 out of 5

awesome

Written By Jeff, Andalusia, Alabama on Tuesday, July 22, 2014
Crutchfield Customer Review (What's this?)
 
Great speakers were just what I was looking for sounds great. No complaints from this guy.
Pros:
Great sound Easy install
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

68 barracuda

Written By Russ, Rio Vista, Ca on Saturday, May 17, 2014
Crutchfield Customer Review (What's this?)
 
Started buying Kappa speakers from Crutchfield 23 years ago. After reading the reviews on the 5.2ii's, decided to stick with the Kappa's. The mids and highs are so detailed and clean, it still makes me smile when listening to my new speakers. This is just the beginning of my system upgrade, planning on the 693ii,s and an Alpine PDX 4 to complete my hot rod tunes.
Pros:
Detailed, clean mids and highs.
Cons:
none
1 out of 1 people found this helpful
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5 out of 5

kappas

Written By Anonymous, olympia, wa on Monday, May 05, 2014
Crutchfield Customer Review (What's this?)
 
Speakers are and sound amazing. Very good quality. Only problem was with adapter plate had to modify but no fault to speaker
Pros:
Very good sound. Amazing high and decent bass
Cons:
None
1 out of 1 people found this helpful
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4 out of 5

Better but not Great

Written By Dman, 44107 on Thursday, May 01, 2014
Crutchfield Customer Review (What's this?)
 
I bought these speakers because of their sensitivity rating. I needed a high sensitivity rating because my car does not provide a significant amount of Watts. Even though these have a high sensitivity rating i did not recognize a big difference between the highs and lows with these speakers. I could have gotten the same amount of output for $50 speakers.
Cons:
Expensive
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5 out of 5

Excellent Sound!

Written By cawgijoe, Centreville, VA on Wednesday, April 30, 2014
Crutchfield Customer Review (What's this?)
 
I ordered two sets of these while on sale to replace the factory speakers in a 2013 Honda Fit Sport. They are well built, high quality speakers. Screw in terminals add a nice touch. The tweeter can be turned so that it faces up if installed low in the doors. The tweeter can also be enhanced by three Db with the press of a button. Installation in the Fit is a bit of a pain since you have to remove the entire door panel to replace the speaker. I really wish the car makers would just have removable speaker grills for easy access, Plastic connectors are easy to break and you will end up running to the dealer to get replacements. I replaced the front two speakers and both fired up fine. I replaced one of the rear speakers and there was no sound. Odd. I reseated the speaker wire, still no sound. I then connected the other Infinity speaker that came in the set, and it worked. To double-check, I connected the factory speaker and it worked. Bad speaker. Called Crutchfield and they immediately sent a new set out that same afternoon! Fantastic customer service. I need to return the defective speaker as well as one of the good ones in the set within 14 days to not be charged. The speakers that came with the Fit actually sound pretty good. These Kappas blow them away. Much clearer sound. Great highs. Great mid-range. Bass is ok for such a small speaker. Improved detail. Highly recommended.
Pros:
Great sound and build quality. Screw terminals.
Cons:
None
2 out of 2 people found this helpful
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5 out of 5

Speakers

Written By Anonymous, Houston, TX on Friday, April 18, 2014
Crutchfield Customer Review (What's this?)
 
Excellent sound quality
Pros:
Quality
Cons:
No bass
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5 out of 5

infinity kappa 52.11i

Written By Ted R., Marshall MI on Thursday, April 17, 2014
Crutchfield Customer Review (What's this?)
 
Great sound these rock
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5 out of 5

Infinity Kappa 52.11i

Written By Anonymous, Ripley, WV on Sunday, March 16, 2014
Crutchfield Customer Review (What's this?)
 
Perfect replacement speakers for my rear doors in my 08 dodge ram
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4 out of 5

Infinity kappa 52.11

Written By Steve, Fischer, TX on Thursday, January 30, 2014
Crutchfield Customer Review (What's this?)
 
Great sound clarity
Pros:
Great sound and quality of speakers
Cons:
Stock head unit don't put out enough watts to drive speakers. Will fix this problem by purchasing new one through Crutchfield
2 out of 2 people found this helpful
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5 out of 5

Pleased

Written By Mark, Indiana on Wednesday, December 04, 2013
Crutchfield Customer Review (What's this?)
 
I am very pleased with the quality of sound for the price. I updated the speakers in my corvette with the stock Bose head unit. The improvement was immediately noticeable. The sound is much fuller than the stock units.
Pros:
Sound quality and price.
4 out of 4 people found this helpful
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5 out of 5

Very nice speakers!!

Written By Jim, Columbia, SC on Thursday, November 21, 2013
Crutchfield Customer Review (What's this?)
 
Bought these speakers as an upgrade to recommended speakers after comparing reviews on Crutchfield. Had them installed in the shelf behind the fronts seats of my 1987 Mercedes 560SL. Installer thought they sounded great and so do I. I wanted them primarily for listening with the top down on my roadster, but they really improved sound with the hard top on also.
Pros:
Crisp sound with decent bass and great volume.
Cons:
None noted!
1 out of 1 people found this helpful
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5 out of 5

Fantastic!

Written By Cody, Gainesville on Monday, September 30, 2013
Crutchfield Customer Review (What's this?)
 
I bought these because my front stock speakers were, well.. horrible. I chose these speakers due to the fact they fit according to Crutchfield's site car recommendation that it will fit my Jeep. So i took a dive and chose them as infinity's were a great pair of speakers. I was shocked that i actually had highs clear mids im not talking bassy just clear. :)

Pros:
everything :D
Cons:
who could hate them?
2 out of 2 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Infiniti Kappa 5.25 Speakers

Written By MikeV, Littleton, CO on Tuesday, August 06, 2013
Crutchfield Customer Review (What's this?)
 
Replaced stock 5.25 Jeep Wrangler speakers, an immediate and dramatic difference! More bass, better mid, crisper highs! I matched to Kappa 4x6 up front for a winning combination. Now I just need to add a sub
Pros:
Great sound, easy to install
Cons:
None
4 out of 4 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

Good sound

Written By Ty, Bothell, WA on Tuesday, July 30, 2013
Crutchfield Customer Review (What's this?)
 
Sound much better than the factory Infinity speakers that my truck came with!
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5 out of 5

Infinity Kappa 52.11i

Written By debbie, flint michigan on Tuesday, July 23, 2013
Crutchfield Customer Review (What's this?)
 
i love them the sound great!!!!!!!!!!!!!!
1 out of 2 people found this helpful
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5 out of 5

Great Sound From A Small Speaker

Written By Rob K, South Jersey on Wednesday, June 26, 2013
Crutchfield Customer Review (What's this?)
 
This was my first purchase from Crutchfield. Great Packaging with the speakers, came with the mounting adapters and hardware which really make the install alot cleaner and easier for sure. The stock infinity speakers in the dodge dakota were blown, these are an excellent upgrade , they sound real crisp and clean off the stock head unit, I imagine they would be even better amplified but I'm definitely happy the way they are now. Would definitely recommend and buy from Crutchfield in the future.
Pros:
Sound Great, Installed Easily
Cons:
None!
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5 out of 5

2004 JEEP TJ

Written By MIKE M., PATTERSON CA. on Saturday, June 15, 2013
Crutchfield Customer Review (What's this?)
 
Compared to the stock speakers this is a great improvement. Using with stock radio sounds really clear. Did a little research and I think the sensitivity of 94 dB was the key. Went right in to the stock sound bar with free wiring adapters.
Pros:
Easy installation and great sound
Cons:
None
2 out of 2 people found this helpful
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5 out of 5

Great sound

Written By Anonymous, Boyertown, Pa on Monday, May 06, 2013
Crutchfield Customer Review (What's this?)
 
These were the last piece of my total upgrade for my sound system. All I can say is totally worth it! Pack a good punch coming from the side in my doors.
Pros:
Terminal connectors are a big plus. They were also packaged very well.
Cons:
Dont know how I feel about having plastic connections to attach the speaker to the door but from using the previous generation of kappa's I feel it is an upgrade from having the screw practically into the rubber of the speaker.
Was this review helpful?    Yes | No
 
5 out of 5

Infinity Kappa 52.11i

Written By 04C240, Alamo on Sunday, March 24, 2013
Crutchfield Customer Review (What's this?)
 
delivery and packaging were flawless...these Infinity speakers are very solid, and deserve no complaints...installation went very smooth in rear doors of 2004 C240 Benz Wagon...i gutted and re-used the factory housings (not those free ones, thanks anyway Crutchfield) after a few minutes with a utility knife and dremmel tool, no new holes, and very solid...note Benz is Brown = (+)Positive, and Pink = (-)Ground...Sound is what you should expect from Infinity, very clean mids, and bright highs, with better than expected lows...rotatable tweeters allowed upright alignment of the handy screw-down terminals without compromising their aim gently upwards into cabin...nice design ideas, thanks Infinity! Highly recommended.
Pros:
Very solidly built, with high quality components throughout, resulting in good punch and clarity, handy screw-down terminals, rotatable tweeters, thoughtful assortment of fastener hardware, moderate price.
Cons:
none found
4 out of 4 people found this helpful
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5 out of 5

2002 Jeep Wrangler Sound Bar

Written By SVFOOL, Bakersfield, Calif. on Monday, February 18, 2013
Crutchfield Customer Review (What's this?)
 
Infinity Kappa 52.11i ...easy install.. awesome sound ... the speaker covers do work with these speakers, you do not have to use the stock covers unless you want to hide what you have in your Jeep, Perfect fit.. installed in less than 30 min with the hardware Crutchfield send for the install... couldn't be happier with these speakers... they sound great even with the stock head unit, cannot wait to get a new head unit to really let these speakers come alive.
Pros:
speaker covers do work with these speakers, you do not have to use the stock covers , easy to install..sound great. Screw wiring terminals on the back of the speaker.
Cons:
cannot think of any reason anyone wouldnt want to have these in their Jeep Wrangler..
7 out of 7 people found this helpful
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5 out of 5

Nice Speakers

Written By DanH, Conshohocken, PA on Sunday, January 13, 2013
Crutchfield Customer Review (What's this?)
 
Nice speakers, sound great.
Pros:
Screw wiring terminals
Was this review helpful?    Yes | No
 

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For a more in-depth review and enhanced detailed information on the Infinity Kappa 52.11i, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_1085211I/Infinity-Kappa-52-11i.html ).