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Kenwood KAC-8406

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General Features:

  • Kenwood Performance Series KAC-8406
  • Class-AB FullRange 2-Ohm Stable 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohms: 70 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
    • Bridged, 4 ohms: 200 watts x 2 chan.
  • Max power output: 900 watts
  • CEA-2006 Compliant Amplifier
  • Speaker-level (high-level) inputs
  • Power MOS-FET Switching Power Supply
  • Soft start turn-on
  • 4, 3 or 2 channel operation
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • Nickel-plated Power, Ground and Speaker terminals.
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink for extreme heat dissipation
  • Input sensitivity:
    • Low level: 200mV - 5V
    • High level: 400mV - 12V
  • Frequency Response: 5 - 50,000 Hz (+0dB, -3dB)
  • Total Harmonic Distortion (THD): <1.0%
  • Signal to Noise Ration: 80 dBA
  • Selectable Crossover Filter Mode: LPF / Off / HPF
  • Variable crossover filter: 50 - 200 Hz, 12 dB/octave
  • Variable Bass Boost (B Ch Only): 0 to +18 dB bass boost at 40Hz
  • Fuse Rating: 25A x 2
  • 4 - 8 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 13-3/16"W x 7-9/16"D x 2-3/16"H
  • 1-year Sonic Electronix Warranty


Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
Color of handle.

Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

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Average Attribution Rating

Browse 5 questions and 28 answers
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Why did you choose this?
Sonic Electronix Store
bought the same amp this spring and by december it began cutting out, didnt save the receipt so I was just outta luck. I did enjoy what the amp did to make my factory installed system sound. Figured I,d give it one more chance and save my paperwork this time.
steven m on Dec 11, 2016
It has the features I was looking for in a quality brand.
Bob R on Nov 7, 2015
gives a clear crisp sound through the speakers. can not beat this price for the quality
Devorn L on Feb 29, 2016
Good reviews online. Hear it's reliable and has fan cooling which would be better for under seat installs.
Garth D on May 25, 2015
will this amp push 2 kenwood 12's decently ?
David G on Nov 4, 2015
Best Answer: Hello David,

Your question is a bit vague. We don't know what the rating of the subwoofers you a referring to are, so no one can accurately give you a proper answer. We suggest giving our sales team a call or shooting them an email, to give you a hand. Alternatively, find a monoblock you are considering, like the mentioned R500X1D, post your question, but please make sure you include a proper model number, NOT a description of the subs. =]
Reply · Report · Rick MStaff on Nov 4, 2015
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it says 10 gauge is recommended for it, but 10 gauge isnt suitable for 900 watts, and it has a discount on a 4 gauge kit. What gauge will fit in this amp?
jeepzj on Jun 27, 2016
Best Answer: Hi Beau,

You are correct, 900W vs 10 gauge is crazy. However, this amplifier (assuming 2ohms) is only capable of up to 400w RMS; so be sure you're looking at the correct figures to make your final decision. Nevertheless, 400w vs 10 gauge is still rather ambitious, we agree.

The strange part is that we believe you are looking at a Cached or old product page, because the current one says we recommend 4-8 AWG and there is no "Max Gauge" because the amp has screw down terminals, not a Gauged Terminal. With that said, we've hard reset our pages and it should now show this information.
Reply · Report · Rick MStaff on Jun 28, 2016
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Richard R on Jun 22, 2016
Reply · Report · Rick MStaff on Jun 22, 2016
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My stock system has 2 preouts and I would like to connect 4 speakers and 1 subwoofer to that. I thought of connecting this Amp to the one Preout of the stock system to play 4 of my speakers. Am I correct in choosing this product? Or do you people have any other Amp to satisfy my need?
Rahul K on Apr 15, 2016
Best Answer: Hello,

First, this is a 4channel amplifier, but what you specified sounds like a 5channel system. As such, this amplifier seems to already be ruled out. Moreover, this amplifier does not have any feature that would allow it drive a signal to all channels with just one input - you didn't specify why you chose this item, so we cannot speak further beyond that. Also, we cannot recommend a product until we know the full scope of the intended install. However, at that point it is best to consult your installer or give our sales team a call, as this medium isn't intended for install help.
Reply · Report · Rick MStaff on Apr 17, 2016
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Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Kenwood KAC-8406