Garage
Shop

Infinity Kappa 50.11cs

5-1/4" 2-Way Kappa Series Component Car Speaker System

Infinity
Shop all Infinity
Product videos
highlight-star-icon

• Peak Power: 255W
• RMS Power: 85W
• 2-Way Component System
• 2 ohm Impedance
• Formed Glass Fiber Cone
• Rubber Surround
• 1" Soft Dome Fabric Tweeters

Learn more about the 5011cs

We apologize

This item has been discontinued

Product Highlights


• Peak Power: 255W
• RMS Power: 85W
• 2-Way Component System
• 2 ohm Impedance
• Formed Glass Fiber Cone
• Rubber Surround
• 1" Soft Dome Fabric Tweeters

Description


Infinity brand icon

Authorized dealer

Will fit most 6x9" and 5x7"/6x8" locations,
with appropriate speaker adapter. Click "Related Items" Tab.



High Fidelity Kappa Series

The 2-ohm nominal impedance of the Infinity Kappa 50.11cs coaxial speakers allows compensation for any added resistance in thin factory-installed speaker wiring and provides more output than factory speakers in its class. The high sensitivity of the Kappa Series makes it ideal for upgrading a factory-installed system’s existing speakers with very noticeable fidelity improvements. The beautiful chrome inserts on the grille match modern interiors, and there are no visible mounting screws. With a modern look, articulate highs and strong lows, the Kappa series speakers are perfect for any factory or aftermarket sound system. Pick yours up today at SonicElectronix.com!


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:

  • 5-1/4" Kappa Series 2-Way Component System
  • Power Handling:
    • Peak: 510 watts per pair / 255 watts each
    • RMS: 170 watts per pair / 85 watts each
  • Recommended Power Range : 25-255 watts each
  • Carbon Injected Glass Fiber cone material
  • Plus One cone technology offers more cone area than other speakers in its class
  • Rubber speaker surround
  • 1" Soft Dome edge-driven Fabric tweeter construction
  • Adjustable, 0 or +3dB push-button tweeter level attenuation control
  • High temperature voice coil reduces distortion
  • Vented magnet and motor assembly cool the voice coil
  • Gold-plated, screw-type speaker terminals for a secure connection
  • Injected Carbon Glass Matrix (iCGM) speaker frames
  • High-quality external crossover filters
  • Protective, soft, rubber-finish grilles
  • Protective magnet boot cover
  • 2 ohm impedance
  • Frequency response: 55-35,000 Hz
  • Top-mount depth: 2-1/16"
  • Sensitivity: 93dB
  • Authorized Internet Dealer
  • 3-year Manufacturer's Warranty

Priced Per Pair

Product history:

Infinity 50.11cs thumbnail
(newest, current model)
Infinity 50.9cs thumbnail
(previous model, replaced by Infinity Kappa 50.11cs)
Infinity KAPPA-50.7CS thumbnail
(previous model, replaced by Infinity Kappa 50.9cs)
Infinity 50.5CS thumbnail
(previous model, replaced by Infinity Kappa 50.7cs)

Best selling similar products

Reference 5030cx small

Infinity Reference 5030cx (REF5030CX)

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

(2)

$99.95

List price $249.95

REF507CF small

Infinity REF507CF (INFSPKRF507CFUS)

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

$219.95

List price $249.95

VSP525KIT small

NVX VSP525KIT

• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 2.04"

(27)

$99.99

List price $119.99

R152-S small

Rockford Fosgate Prime R152-S

• 80 watts Peak Each, 40 watts RMS Each
• 1" Mylar Balanced Dome tweeters
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

(26)

$79.99

List price $79.99

TERMINATOR52 small

MTX Audio TERMINATOR52

• 70 watts Peak Each, 35 watts RMS Each
• 1" Mylar Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 83.6 dB

(5)

$39.99

List price $129.95

PR503CF small

Infinity Primus 503CF (PR503CF)

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

(1)

$119.95

List price $149.95

XED525C small

Cerwin-Vega XED525C

• 250 watts Peak Each, 30 watts RMS Each
• 1/2" Metal Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

(8)

$59.99

List price $71.99

Kappa 503CF small

Infinity Kappa 503CF (INFSPKKA503CFAM)

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge Driven Dome uni-pivot and angled tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

(1)

$279.99

List price $449.95

DB5252 small

Polk Audio DB5252 (DB 5252)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" dual Silk Dome tweeters
• UV-Resistant Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

(4)

$200.00

List price $209.99

51KSS504 small

Kicker KSS5 (51KSS504)

• 200 watts Peak Each, 100 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

(2)

$249.99

List price $279.99

Specifications & Details


Speaker Specifications
Series
Kappa Series
Priced Per
Pair
Speaker Size
5-1/4"
Design
2-way Component System
Tweeter Design
Dome
Tweeter Size
1"
Tweeter Composition
Cloth
Woofer Composition
Carbon Composite
Woofer Surround
Rubber
Peak Power Handling
255 watts
RMS Power Handling
85 watts
Sensitivity
93 dB
Frequency Response
55 - 35000 Hz
Impedance (Per Voice Coil)
2 ohm
Shallow Mount Installation
No
Top-Mount Depth (Mounting Depth)
2-1/16"
Cutout Dimensions
4-11/16" x 4-11/16" 
General specifications
Speaker Grilles
Yes
Warranty and Return Policy
Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

50.11cs

Weight:

6.50lbs

Internal SKU:

5011cs

Internal Product ID:

60699

Product and How-to Videos


  • Harman International: The Pursuit of Great Sound
  • Infinity Kappa Series Speakers | Coaxial and Component Car Speakers

Customer Ratings & Reviews


Infinity Kappa 50.11cs thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
4.7
Value
4.4
Features
5
Design
5
Usability
5

Customer Reviews

Sort by:

Loading...

amazing

I bought these speakers and the 6 1/2 version, while ive only installed the 6 1/2"s in a previous vehicle, powered by a kenwood 4ch amp pushing 85w @ 2ohm, they sounded incredible, super crisp and clear. i am now installing the 5 1/4 set into my current vehicle and have purchased the current model of the kenwood amp that powered the 6 1/2" set, which will put out 100w @ 2ohm. due to the 5 1/4" being a small speaker size i imagine the very low end will suffer, which is why i am also going to be running an 8" sub to complete the setup.

By Eric on August 2, 2014

23 found this helpful


infinity speakers!!

speakers are great and the service was second to none thank-you sonic!!!

By Ron on March 23, 2015

17 found this helpful


Crisp clean and LOUD!

I got these to replace my Kappa 6x8's that were discontinued years ago. The old Kappa's were amazing and I only replaced them after a careless mechanic smashed one of my tweeters. It turned out to be a good thing because I am seriously impressed by these new Kappa 5.25's. They are loud and crisp with tremendous frequency response and sensitivity. I'm running these with an audiophile quality Pioneer deck and an old school MTX Elite 1000.4 4 channel amp. I highly recommend these speakers. Please amplify to reach their full potential!

By Stephen on July 10, 2016 Checkmark Icon Verified purchase

2 found this helpful




SA68 main

Scosche SA68

• The SA68 speaker adapters fit most aftermarket 5 1/4" and 6 1/2" speakers into a 6" x 8" factory opening
• Compatible with select 1950-2025 vehicles from Ford, Mercury, Mazda Vehicles

(39)

$7.99

List price $14.99

82-5600 main

Metra 82-5600

• 5 1/4" / 6-1/2 Component/Coaxial Speaker to 6" x 8" Adapter
• Works with 6.5" Speakers
• Installs in 5x7" and 6x8" Locations
• Compatible with select 1981-2017 vehicles from Mercury, Mazda, Lincoln Vehicles

(3)

$15.99

List price $17.99

82-6901 main

Metra 82-6901

• Speaker adapter for select 1977-2024 vehicles from Dodge, Chevrolet, Chrysler
• For the installation of 5.25” or 6.5” speakers
• One pair of adapters included in each package

(39)

$14.99

List price $22.99


PFL166IRG small

Absolute PFL166IRG (Gray)

16" TFT-LCD Overhead Flip-down Monitor with Built-in IR Transmitter and Remote Control

$149.99

List price $799.99

50.9cs small

Infinity Kappa 50.9cs

5-1/4" 2-way Kappa Series Component Speakers System (KAPPA50.9CS)

(1)

$139.95

List price $349.95

CTX-69 small

Image Dynamics CTX-69

200W 6x9" 2-Way CTX Series Coaxial Speakers w/ Silk Tweeters

(2)

$139.99

List price $199.99

CTX-6 small

Image Dynamics CTX-6

280W Peak (140W RMS) 6" 2-Way CTX Series Coaxial Car Speakers w/ Silk Tweeter

(1)

$109.99

List price $129.99

VXT69 small

The Install Bay VXT69

XTC 6" x 9" Foam Acoustic Speaker Baffles

(35)

$22.99

List price $25.99

PSD3000 small

Mr DJ PSD3000

Dual 15" 3000W Max DJ Loud Speaker

(25)

$199.99

List price $399.99

P9695B small

Planet Audio P9695B

6.95" Double-DIN CD/DVD Touchscreen Digital Multimedia Receiver

(4)

$149.95

List price $279.99

C2-350X small

JL Audio C2-350x

50W RMS 3.5” C2 Series 2 Way Coaxial 4-ohm Car Speakers

(15)

$159.99

List price $159.99

XDVD8181 small

Dual XDVD8181

In-Dash 7" Touchscreen TFT-LCD Monitor with DVD, Multimedia CD/MP3 Playback

(23)

$249.99

List price $349.99

Related Searches


Save up to 10 different vehicles in your garage

Add vehicle
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.