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Infinity KAPPA FOUR

1200W Kappa Series 4-Channel Amplifier

Infinity
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• 125W x 4-Chan. @ 4 Ohms
• 150W x 4-Chan. @ 2 Ohms
• 300W x 4-Chan. Max
• Tuned Bass EQ
• Speaker-level Inputs
• Variable High and Low Pass Filters
• 4/3/2 Channel Operation

Learn more about the do-not-usekappafour

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

kappafouram thumbnail

Infinity Kappa Four

OUR PRICE: $349.95

View item

Product Highlights


• 125W x 4-Chan. @ 4 Ohms
• 150W x 4-Chan. @ 2 Ohms
• 300W x 4-Chan. Max
• Tuned Bass EQ
• Speaker-level Inputs
• Variable High and Low Pass Filters
• 4/3/2 Channel Operation

Description


Infinity brand icon

Authorized dealer

General Features

  • Infinity KAPPA 4-Channel Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohms: 125 watts x 4 chan.
    • 2 ohms: 150 watts x 4 chan.
    • Bridged, 4 ohms: 300 watts x 2 chan.
  • Max power output: 300 watts x 4 chan.
  • DirectFET transistors for increased power output
  • Remote bass level input (remote level control sold separately
  • LED power indicators for DC output, over/under voltage, and Short circuit protection
  • Tuned Bass EQ (0-12 dB bass boost at 50 Hz)
  • High-power class D circuit topology
  • 4/3/2 Channel operation
  • Speaker-level inputs
  • 3-Way Smart System Protection
  • Heavy duty heatsink for extreme heat dissipation
  • RCA level inputs
  • Screw terminals
  • Variable high-pass filter (32-320 Hz, 12 dB/octave)
  • Variable low-pass filter (32-320 Hz, 12 dB/octave)
  • Frequency response: 10-75,000 Hz
  • Dimensions: 13"D x 7-1/16"W x 1-3/4"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • Authorized Internet Dealer
  • 3-year Manufacturer's warranty
Check out the Infinity KAPPA FOUR Owner's Manual


Product history:

Infinity Kappa Four thumbnail
(newest, current model)
Infinity DO-NOT-USE-KAPPA-FOUR thumbnail
(previous model, replaced by Infinity Kappa Four)

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
125 watts x 4 channel
RMS Power @ 2 ohms
150 watts x 4 channel
Bridged RMS Power
300 watts x 2 channel
Amplifier Specifications
Series
Kappa Series
Amplifier Class
D
Number of Channels
4-Channel
Total Peak Power Output
1200 watts
Total RMS Power Output
600 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
1%
Speaker Level Inputs
Yes
Preamp Outputs
No
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
32 - 320 Hz
Low-Pass Crossover Frequency
32 - 320 Hz
Signal-to-Noise Ratio
85 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
No
Fuse Rating
40A x 2 
Total Fuse Rating
80
Strappable
No
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
What is in the box?
Paperwork
User manual
WITB: Amplifiers
Amplifier
Mounting screws (4)
Two spare fuses
Warranty and Return Policy
Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

DO-NOT-USE-KAPPA-FOUR

Weight:

8.00lbs

Internal SKU:

do-not-usekappafour

Internal Product ID:

17780

Product and How-to Videos


  • Harman International: The Pursuit of Great Sound
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews



5 star
91%
4 star
5%
3 star
0%
2 star
5%
1 star
0%



Durability
4.7
Value
4.7
Features
4.9
Design
4.9
Usability
4.9

Customer Reviews

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Kappa Four

Amazing power on a compact design. Sound quality is outstanding!

By Jose on December 2, 2011

97

found this helpful.

Great!!!

I have had the amp for 4-5 mouths. No problems or issues. I would buy it again!

By Chris on June 9, 2014

98

found this helpful.

Absolutely Gorgeous

After having an unnamed Maxxsonics made 4-channel heat itself to death on me, I opted to bite the bullet and mate this to my Kappa Perfect 6 and Reference 6830cs speakers. One word: Amazing.for an amp that is literally, half of the size of the amp it replaced, it pushes twice as much power and is still cool to the touch. Sound quality was the primary purpose of my build, and it more than meets my needs.

Also, it looks beautiful.

By Sikotik13 on July 9, 2013

101

found this helpful.

Dissapointed

I spent a while looking for a good 4 channel amp to buy and I saw that this amp received good feed back. After having it in for almost a month, it blew on me. Now before you say I had my wiring bad, no, I had a solid ground with full contact, proper sized power and ground. I've had problems with the amp to what I was suggested it to be as clipping. I had the voltage input at about half and the vibrating from the speakers stopped and to add to that, the fuses didn't blow, the amp did, non of the protections worked. Maybe I just received a bad amp, but I surely won't be buying anything from Infinity again.

By Brandon on December 31, 2012

96

found this helpful.

Awesome Piece

Powering 2 - 10" Kappa 100.9W's in bridged mode in an extended cab GMC pickup, tri-amped with active crossover. The sound is crisp, clear and as loud as you want it to be, but be prepared to upgrade your charging system - this amp will give your alternator a workout. A joy to setup, all settings are easy to configure and no tweaking was necessary after initial setup. The sound is fantastic, with no coloration audible. Highly recommend this amp to anyone looking for a clear natural sound. Sonic Electonix was great to deal with and any future purchases will definitely be through them.

By Ross J. on November 23, 2012

88

found this helpful.

Great Amp

The amp is great. It has fantastic sound, lots of power, and is easy to install and set up. The frequency response is good and it is easy to make adjustments. I am very happy with this amp.

By Mr C on September 17, 2013

85

found this helpful.

Kappa Four

Absolutely everything I wanted in an amp, plus a power rating that is very conservative. It is small, powerful, clean as crystal, has the right adjustments, and is very robust. You can use the front two channels to push all the speakers you want, and bridge the back two for a really conservative 300x1 @ 4ohm. I swear this back two channels bridged has driven my 2 4ohm jls (2ohm load) as well as my Kappa monoblock (rated 500rms at 4ohm). When set up in the livingroom against other considerations for my mids and highs, going from my other amps to the Infinity showed just full and musical the Infinity amp is compared to some lesser brands. Best I have owned, and it is not the most expensive I have owned.

By DrBen on September 2, 2011

67

found this helpful.

Amazing

This amp is solid!! If the missing piece of your puzzle is an amp then look no further. I dont brag on shops often, but Sonic is the place to get your stuff. These guys know their s-it!! I explained what I had and what I wanted and they got me what I needed. I will definitely purchase from them again.

By Creighton on February 9, 2014

72

found this helpful.

Great amp

The sounds is clear and crisp, love this amp. Much better than the MTX 4004 that I originally had. Does not cut out and runs quite cool.

By Daviboysmith on August 21, 2013

59

found this helpful.

Kappa Four

Had a powerbass amp before this one and the Kappa Four is definitely worth the extra $$. 2x cleaner and has extreme power for the compact design. Definitely enjoy the controls on the faceplate considering it is mounted on the back wall of my f150.

By Justin on July 26, 2012

59

found this helpful.

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