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Kenwood KAC-8401

60W x 4 Car Amp

1 Review

Item # 113KAC8401

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Our take on the Kenwood KAC-8401

Want more power? Maybe you've got a component speaker system or a power-hungry sub, or maybe you just like to crank the volume a little bit louder than your neighbor. Whatever the reason, Kenwood amplifiers have got your power needs covered.

Want more power? Maybe you've got a component speaker system or a power-hungry sub, or maybe you just like to crank the volume a little bit louder than your neighbor. Whatever the reason, Kenwood amplifiers have got your power needs covered.

Looking for a multichannel amp to drive your front and rear speakers? The KAC-8401 amp punches out 60 watts RMS by 4 channels of MOSFET-fueled power, complete with variable crossovers and bass boost. Need bass? Bridge this versatile Kenwood to 2-channel mode, and feed your subs big power.

A set of preamp outputs allow you to pass signal to a second amplifier without running another set of patch cables from your receiver. The cast-aluminum heat sink and built-in cooling fan ensure reliable operation.

Product Highlights:

  • 60 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)
  • 180 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)
  • 2-, 3-, or 4-channel output
  • variable high-/low-pass crossovers (50-200 Hz, 12 dB/octave)
  • Tri-way capable (Tri-Way crossover required)
  • bass boost on rear channels (0/6 dB at 90 Hz)
  • cooling fan
  • preamp- and speaker-level inputs
  • preamp outputs
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 12-1/2"W x 2-3/16"H x 11-1/4"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Four-channel amplifier
  • Speaker level input harness
  • Rubber terminal cover
  • 4 Self-tapping screws
  • Instruction Manual
  • Warranty card

Kenwood KAC-8401 Reviews

Average Customer Review(s):

(1 Review)

Kenwood KAC-8401 Amp

Larry from Charlotte, North Carolina on 12/13/2008

The Kenwood KAC-8401 is a great 4 channel amp Pros: Great price/Good Looks/Blue On Light/ 60 Watts RMS @ 4 channel power at @ 4 Ohms. Easy to adjust/Easy on the eyes/and "CLEAN" Clean power. Bass/Midrange/Tweeters all work together making loud Clean Power Attractive/Easy Installation/Easy setup Cons: Bass boast only on B channel and model has been updated by a 50 watt unit I'm very happy with this model. Larry




Hands-on research

Product Research

Inputs and Outputs
Additional Specifications


Two Amplifiers In One: The KAC-8401 amplifier is a 4-channel amplifier, which includes 2 stereo amplifiers (called Amplifier A and Amplifier B) in one body.

Line Level Inputs: Amplifiers A and B each have a separate line-level input with gold-plated RCA jacks. The Input Sensitivity controls will accept an input signal of 200mV to 5.0 Volts. If you are using a receiver with only one pair of preamp outputs, the amp will allow you to feed both Amplifier A and B with a single stereo input. The Input Selector switch gives you a choice of using A + B inputs or A inputs only. Note: When the amplifier switch is in the A input only position, the fader control on the radio will no longer allow you to fade between Amplifier A and B.

Speaker Level Input: The KAC-8401 comes with a 4-channel speaker level input harness. Once you splice the front and rear speaker wires from the receiver to the harness, you have plug-in convenience to the amplifier. This feature makes it easier to add an amplifier to a factory radio or a receiver with no preamp outputs. The maximum power output from the source receiver can be no more than 40 watts.

Line Level Output: The amplifier has a line level output for feeding a full-range stereo signal to another amplifier. The jacks output the signals input input to Amplifiers A and B, and is always in stereo regardless of the position of the Operation (stereo/mono) switch.

Crossovers: The KAC-8401 has two built-in 12 dB/octave crossovers, one for Amplifier A and one for Amplifier B. Each crossover can be independently set to high-pass or low-pass operation or switched off for full-range operation. The crossover frequency is continuously variable from 50Hz to 200Hz.

Bass Boost: A fixed bass boost of 6dB at 90Hz can be engaged for Amplifier B only. There is no bass boost for Amplifier A.

Stereo/Mono Operation: You can independently switch Amplifier A and Amplifier B for Stereo or Mono operation. When switched to Mono operation, the signal from the left channel input only is used.

Protection circuitry: The amplifier features protection circuits that will shut the amp down in case of the following events:

  • Speaker output contacts ground
  • Speaker wire short-circuits
  • Unit malfunctions and DC is sent to speaker output
  • Internal temperature is too high
  • Loss of ground of head unit or amp

Fan Cooled: The KAC-8401 has a cooling fan mounted to the top of the amplifier for better ventilation.

Inputs and Outputs

Left Side of the Amplifier

  • GND: Philips-head screw for RCA signal ground
  • Speaker-level input: multi-pin input for use with included speaker level input harness
  • "A" and "B" line-in jacks: two pairs of gold plated RCA inputs
  • Line out jacks: gold plated RCA outputs that provide a summed signal from the "A" and "B" sets of line inputs  

Right Side of the Amplifier

  • Fuse: 40 amp fuse
  • BATT (Power): gold plated screw terminal (0.55" wide)
  • GND (Ground): gold plated screw terminal (0.55" wide)
  • P.CON (remote turn-on): gold plated screw terminal (0.35" wide)
  • Speaker outputs: gold plated screw terminals (0.35" wide) for front and rear, left and right loudspeakers (bridged = Left+ and Right-) 

Additional Specifications


  • Rated power output at 2 ohms: 90 watts x 4 (1 kHz, 0.8% THD)
  • Rated power output at 4 ohms, bridged: 180 watts x 2 (1 kHz, 0.8% THD)
  • Max power output at 4 ohms, bridged: 320 watts X 2
  • Input impedance: 10k ohms
  • Operating voltage: 14.4 V (11-16V allowable)
  • Current consumption (1 kHz, 10% THD): 39A

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