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Infinity Kappa 52.11i 5-1/4" 2-way car speakers

Item # 1085211I

Infinity's Kappa Series 52.11i 5-1/4" speakers continue in the tradition of this legendary line of...

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Infinity's Kappa Series 52.11i 5-1/4" speakers continue in the tradition of this legendary line of...

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Item # 1085211I

Shop all Infinity 5-1/4" Speakers

About the Infinity Kappa 52.11i

John Pollard

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.
Infinity Kappa.11i

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.

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Product 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"
  • grilles included
  • warranty: 3 years
  • MFR # 52.11i

What's in the box:

  • 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

Customer reviews for Infinity Kappa 52.11i

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More details on the Infinity Kappa 52.11i

Pat M.

Features & specs

General
Speaker Size 5 1/4
Design 2-way
Tweeter Design 1" Dome
Impedance (Ohms) 2
Tweeter Composition Textile
Woofer Composition Formed glass fiber
Woofer Surround Rubber
Parts Warranty 3 Years
Labor Warranty 3 Years
Specifications
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 94
Frequency Response 55 - 25k Hz
Minimum RMS Wattage 5
Maximum RMS Wattage 55
Peak Power Handling (Watts) 165
Top-mount Depth (Inches) 2 3/16
Bottom-mount Depth (Inches) 2 3/8
Cutout Diameter or Length (inches) 4 11/16
Mounting Height (Inches) 0.662
Frame Width 5.232
Frame Length 5.232
The Infinity Kappa 52.11i replaces these items:

Product Research

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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Customer Q&A

6 questions already asked

Q
My Honda 2008 pilot has a oval cut 4 inch wide by 4 15/16 on the rear door. I can't find speakers or fit. Need help?
daniel  Mar 17, 2018
1 answer
A
We have a wide selection of aftermarket speakers that are a recommended fit in the rear doors of your 2008 Honda Pilot. You can view them all by using the "Find What Fits" application on our website here: https://www.crutchfield.com/car/carselector.aspx?lp=%2fCar%2foutfitmycar%2fmycar.aspx For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service: https://www.crutchfield.com/support/ContactUs.aspx
ryan  Mar 30, 2018 (Staff)
Q
Will these fit 2017 Nissan 370z doors?
randy  Oct 09, 2017
1 answer
A
You can check to be sure this will fit your vehicle by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx
kristina  Oct 13, 2017 (Staff)
Q
Will these fit in the rear doors of a 2011 Chevy Silverado extended cab?
aaron  Aug 28, 2017
1 answer
A
You can check to see if this will fit your vehicle by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
kenneth  Aug 28, 2017 (Staff)
Q
Will these fit in a 2006 Wrangler? Says they won't fit in the roll bar but it doesn't say why. If I can't use the factory grills i'm okay with that, I don't have them anyway.
nathan  Nov 16, 2015
1 answer
A
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
kristina  Nov 17, 2015 (Staff)
Q
Will these speakers have connections that will hook up to my 2009 harley street glide ? Plug and play so to speak ? And if not , could you give me a list of a few that will ? Thanks , Jeff
jeff  Aug 31, 2015
1 answer
A
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your Harley and give you the details on if this will fit and what you will need for an installation in your Harley.
kristina  Aug 31, 2015 (Staff)
Q
can i drive these speaker with a 70W RMS signal..? as i see the amplifier range from 5-75W RMS. Please help me in this, my amp is a sony xm-gs400. Thanks in advance..!
vamsy  Jan 18, 2015
3 answers
A
But according to the specs, it's listed as 5-50w rms. I hope the speakers don't die.
vamsy  Jan 19, 2015
A
Yes, the speakers will be just fine; I currently have mine paired with a Rockford Fosgate PBR300X4 which outputs 75 watts RMS x 4 for almost two years with no issues. I was always taught that it is not power that kills speakers, it is distortion that kills speakers (within reason, of course....you wouldn't pair a 50 watt speaker with a 600 watt amplifier and expect that speaker to hold up too well).
kevin r  Jan 19, 2015
A
Yes, 70 watts rms is within the acceptable range of these speakers. I am very happy with my purchase of these.
darion  Jan 18, 2015
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