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Infinity Kappa K5

5-channel car amplifier with Bluetooth® connection — 75 watts RMS x 4 at 4 ohms + 350 watts RMS x 1 at 2 ohms

Item # 108K5

Power your entire system with one relatively compact amplifier.

Find what Fits your car

Power your entire system with one relatively compact amplifier.

Discontinued item
4 questions - 5 answers

Item # 108K5

About the Infinity Kappa K5

High tech and stylish

Power your entire system with one relatively compact amplifier. Infinity's Kappa K5 5-channel car amplifier can supply each of your four full-range speakers with 75 watts RMS while it drives a sub with up to 350 watts — good news for all you music fans out there.  Even better, you can stream music directly from a Bluetooth device to this amp, while its built-in processing restores the excitement in your music that data compression removes. Plus, the dancing, signal-level LEDs on the cover add to the amp's high-tech look and overall coolness factor.

High tech and stylish

Power your entire system with one relatively compact amplifier. Infinity's Kappa K5 5-channel car amplifier can supply each of your four full-range speakers with 75 watts RMS while it drives a sub with up to 350 watts — good news for all you music fans out there.  Even better, you can stream music directly from a Bluetooth device to this amp, while its built-in processing restores the excitement in your music that data compression removes. Plus, the dancing, signal-level LEDs on the cover add to the amp's high-tech look and overall coolness factor.

Connectivity is the name of this game

You can stream music from your compatible Bluetooth device directly to the K5, for convenient, wireless play that bypasses your car's radio. The Party Mode feature allows up to three different sources to stream, so more people can join in the fun. The included wired remote gives you handy controls for Bluetooth streaming, hands-free calling, Party Mode, and Clari-Fi signal processing.

Powerful and versatile

You can put the K5 into 3-channel mode and drive a couple high-performance speakers with 200 watts RMS each, along with 350 watts for the sub. Separate high- and low-pass filters on the front and rear channels match the amp's output to your speakers, increasing the efficiency of the system. The Kappa K5 subwoofer channel features Infinity's Dynamic Bass Optimizer (DBO™) circuitry, which uses a subsonic filter and bass boost to optimize the performance of your sub and enclosure combo.

Decompression saves the sound

Downloaded digital music and streaming services apply data compression to their files so you can store more of them on your devices, but compressed music sounds noticeably duller than uncompressed files. Harman's Clari-Fi™ sound restoration technology improves the sound quality of your digital music by analyzing the data and then reconstructing the parts that were removed during the compression process. You get crisper highs, increased dynamics, and clearer vocals.

Infinity Kappa K5

Kappa K5 input and control panel

READ LESS

Product highlights:

  • 5-channel car amplifier
  • 75 watts RMS x 4 + 200 Watts RMS x 1 at 4 ohms
  • 100 watts RMS x 4 + 350 watts RMS x 1 at 2 ohms
  • 200 watts RMS x 2 bridged at 4 ohms + 350 watts RMS x 1 at 2 ohms
  • separate variable high-pass filters (32-320 Hz, 12 dB/octave) on front and rear channels
  • low-pass filter on subwoofer channel (32-320 Hz, 12 dB/octave)
  • Dynamic Bass Optimizer on subwoofer channel uses variable bass boost (0-12 dB at 45 Hz) and subsonic filter (10-80 Hz, 12dB/octave)
  • phase switch on subwoofer channel (0, 180 degrees)
  • wired remote unit has controls for Bluetooth streaming, hands-free calling, Party Mode, and Clari-Fi signal processing
  • preamp and speaker-level inputs (bare wire to RCA adapters included)
  • fuse rating: 30A x 3
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 13-1/8"W x 1-3/4"H x 6-15/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # K5

What's in the box:

  • 5-Channel amplifier
  • Six 30A ATO fuses (3 installed)
  • Control panel with attached 19.5' cable
  • Control panel flush mount sleeve
  • Control panel mounting bracket
  • 2 M4 x 10mm bracket screws
  • 4 Bare wire-to-RCA adapters
  • 4 Mounting screws (M4 x 52mm)
  • Quick Start Guide

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Features

Overview: The Infinity Kappa K5 is part of the Kappa series of high-performance amplifiers. This full range Class D 5-channel amplifier will accept both high-level and low-level inputs. It has four full-range channels, and one channel dedicated to subwoofers. Class D amplifiers are highly efficient and compact, generating lots of power without drawing much current or generating heat. The Kappa K5 includes Clari-Fi, an audio restoration feature that improves the sound of compressed digital files. The amp also includes a cabin-mounted control panel to give you amplifier control at your fingertips. The unit comes with spare fuses, speaker wire-to-RCA adapters, and mounting hardware.

Power Output: The Kappa K5 delivers the following power output:

  • 75 watts RMS x 4 + 200 watts RMS x 1 at 4 ohms (<0.1% THD+N)
  • 100 watts RMS x 4 + 350 watts RMS x 1 at 2 ohms (<0.1% THD+N)
  • 200 watts x 2 at 4 ohms bridged (<0.3% THD+N)

Clari-Fi: Clari-Fi is a proprietary technology that analyzes compressed digital music files and improves them in real time. Using a predictive algorithm that restores audio content that is lost during the compression process. Clari-Fi provides extra bandwidth, especially in the high frequencies, widens the sound stage, and gives vocals a natural warmth not found in compressed files.

Control Panel: The amplifier comes with a wired control panel that provides numerous features not typically found with amplifiers. It has Bluetooth technology, and an omni-directional microphone for accepting and ending phone calls from your cell phone. Party Mode lets you pair multiple Bluetooth devices for streaming music from anyone's phone. The control panel also lets you activate the Clari-Fi feature. The panel is 4-7/16"W x 15/16"H, and has a 19.5-foot cable. It can be flush- or surface-mounted with the supplied brackets.

ADAS: The Kappa K5 has an interface for the Advanced Driver Assistance System (ADAS) that can override the audio source input to deliver a message or other audio from a connected ADAS accessory. On the amplifier, you can designate which speaker the ADAS signal is output: Front left, front right, rear left, or rear right.

Protection Circuitry: The amplifier features protection circuitry for thermal overload, over- or under-voltage (<9V or >16V), and short circuits. The LED on the top of the amp glows red if the amp goes into protection mode.

Dynamic Bass Optimizer (DBO): Infinity's Dynamic Bass Optimizer features a subsonic filter (10Hz - 80Hz) and bass boost (0 - 12dB) to let you configure the amp's subwoofer channel for the best output for the type of sub enclosure. For sealed enclosures, you should set the frequency control at 35 Hz, and adjust the Bass Boost to suit your preference. For vented enclosures, the subsonic filter should be set to 10 Hz, and the Bass Boost adjusted to the amount of bass you desire.

Controls: The Kappa K5's controls are located on one side of the amplifier. The rotary controls require a small screwdriver (not included) to make adjustments. The amp controls include:

  • Gain: The rotary gain controls let you match the amp's input sensitivity to the output of the source unit. The input sensitivity range of the amplifier is 0.2V and up for a low-level input, and up to 20V for speaker-level input. There are separate gain controls for the front, rear, and subwoofer channels.
  • Input Level: The Input Level switch lets you select the type of input you are using. For high-level input, there are two settings: Hi1 and Hi2. If the audio system fails to play with an amplifier connected to its output, or you get a "speaker disconnected" message on your factory stereo, set the switch to the Hi2 position. The Hi2 position includes a circuit design to fool this type of factory system into "seeing" a speaker connected to its output.
  • Crossover: The amp features switchable crossovers for the front and rear channels that can be set to low pass (LPF), high pass (HPF), or Full Range. The subwoofer channel also has a low pass filter. You can adjust the cutoff frequency of the crossovers from 32Hz to 320Hz using the rotary controls.
  • Subwoofer Controls: Dedicated controls for the subwoofer channel include gain control, low pass filter (32-320Hz), phase control (0°/180°), and sub input (Internal/External). The DBO controls include Bass Boost (0-12dB) and Subsonic Filter (10Hz-80Hz).

Connections: The Infinity Kappa K5 uses set screw terminals for the +12V power, ground, turn-on (remote) lead, and speaker outputs. The screws can be tightened/loosened with a Phillips-head or flat-head screwdriver (not provided). The amp connections include:

  • Power/Ground: The +12V Power and Ground terminals will accept up to 4-gauge wire. It is recommended that you use 4 AWG power wire to the battery, with an in-line 90A fuse (or higher) installed no more than 18" from the battery terminal. A 4 AWG ground wire (minimum) is also recommended, and attached to a metal area close to the amplifier.
  • Speaker Outputs: The amp features screw terminals for connecting five speakers. There are markings on the terminals for bridging the front and rear channels.
  • Speaker-Level Input: The amp includes four bare wire-to-RCA adapters for connecting the amp to a factory radio or aftermarket head unit without preamp outputs. You should attach each speaker wire from the head unit to an adapter and plug the adapter's RCA plug into the amp.
  • Line-Level Inputs: The amplifier is equipped with three pairs of RCA inputs for connecting stereo RCA patch cables from the head unit to the amp.

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Customer Q&A

4 questions already asked

Q
Does this amp accept a balanced input at 5V max?
[ Kevin  Mar 01, 2018 ]
1 answer
A
Sorry haven't had time to hook it up yet!
[ perry  Mar 15, 2018 ]
Q
Do the RCA converters have resistors in them?
[ Tim G.  Nov 22, 2017 ]
2 answers
A
No, but on the amp itself you can choose the input level. lo, HI1 and HI2. basically turning down the input volume
[ Sawyer  Dec 04, 2017 ]
A
No, they don't. The amp is made to accept a high level signal input.
[ Ryan  Nov 29, 2017 ]  Staff
Q
whats the thd%?
[ chris  Aug 27, 2016 ]
1 answer
A
Thanks for your question. THD at Rated RMS Power 0.1%. You'll find this information on the main product page Details tab under "Features and Specs". Hope that helps.
[ Kenny  Aug 27, 2016 ]  Staff
Q
If I have the amplifier input set to my head unit output and my Bluetooth phone is also connected, can I have the Bluetooth input temporarily interrupt/attenuate the head unit signal? E.g. when using a GPS app on my phone and navigation prompts are over Bluetooth while the radio is playing.
[ The Crusher  Jul 17, 2016 ]
1 answer
A
When using the analog audio inputs, any incoming Bluetooth audio will over-ride the analog signal for playback through the speakers. This is primarily for incoming phone calls but also works for Bluetooth streaming audio from your phone. I hope that helps! My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5
[ Ryan  Jul 21, 2016 ]  Staff

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