Skip Navigation

Kenwood KAC-8405

4-channel car amplifier — 60 watts RMS x 4 (Factory Refurbished)

20 Reviews

Item # 613KAC8405

This item is no longer available.

Shop all Car Amplifiers

Overview

Our take on the Kenwood KAC-8405

Kenwood Performance Series car amplifiers offer long-term reliability and superior sound quality in a compact, no-nonsense package. The KAC-8405 4-channel amp delivers 60 watts RMS to each of your front and rear speakers, or you can drive a couple of subs with 180 watts RMS each in 2-channel mode. A rugged cast-aluminum heatsink combines with two cooling fans to keep this amp running at optimal temperatures, even when you're pushing your system hard.

Kenwood Performance Series car amplifiers offer long-term reliability and superior sound quality in a compact, no-nonsense package. The KAC-8405 4-channel amp delivers 60 watts RMS to each of your front and rear speakers, or you can drive a couple of subs with 180 watts RMS each in 2-channel mode. A rugged cast-aluminum heatsink combines with two cooling fans to keep this amp running at optimal temperatures, even when you're pushing your system hard.

Built-in high- and low-pass filters adjust the output so you'll get the best sound possible from your system. You can dial in up to 18 dB of bass boost to fatten up the sound.

An aluminum cover plate covers and protects the amp's controls and connections, giving your installation a professional look. Speaker-level inputs and signal sensing turn-on allow these amps to hook up to factory radios without preamp outputs.

sounds great

rod, Ga

What's in the Box:

  • Refurbished 4-channel amplifier (with two 30A ATO fuses inserted in chassis)
  • 8" Speaker-level input harness
  • 4 Self-tapping screws (4mm diameter x 16mm)
  • Allen wrench
  • Instruction Manual (Eng/Fre/Spa)
  • Warranty card

Product Highlights:

  • 4-channel car amplifier
  • 60 watts RMS x 4 at 4 ohms (90 watts x 4 at 2 ohms)
  • 180 watts RMS x 2 bridged output at 4 ohms (4 ohm stable in bridged mode)
  • 2-, 3-, and 4-channel operation
  • CEA-2006 compliant
  • variable high- and low-pass filters (50-200 Hz, 12 dB per octave)
  • variable bass boost (0-18 dB at 40 Hz)
  • dual cooling fans
  • MOSFET power supply
  • speaker-level inputs with signal sensing turn-on
  • preamp inputs
  • fuse rating: 30A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 11"W x 2-3/8"H x 9-1/2"D
  • warranty: 90 days
  • Our 60-day money-back guarantee
Reviews

Kenwood KAC-8405 Reviews

Average Customer Review(s):

(20 Reviews)
rewards card

Submit a review and enter to win a $350 rewards card

Review this product

Thanks for submitting your review

Most reviews are processed and published within 5 business days. You will receive a confirmation email once your review has been published.

Your Review

Use the stars below to rate the overall product on a scale of 1-5
1500
Upload your photos

Not visible. Email associated with order.
(e.g., Charlottesville, VA)

Additional Fields (optional)

500
500

By submitting this review, you agree to our terms and review guidelines.

Filter by rating

Customer photos


<< >>
Details

Hands-on research

Product Research

Features
Controls
Connections

Features

MOSFET Switching Power Supply: The amplifier utilizes a MOSFET switching power supply providing thermal stability and efficient switching speeds guaranteeing performance and dependability.

CEA 2006 Compliant: The KAC-8405's power ratings are measured according to the strict standards dictated by the Consumer Electronics Association (CEA). These standards allow you to accurately compare the rated power output of all CEA 2006-compliant amplifiers, even if they come from different brands. Manufacturers who adhere to the standards can display the CEA 2006 logo on their products and packaging.

Amplifier Rating: The Kenwood KAC-8405 Four-Channel amplifier is bridgeable (4-ohm), as well as 2-ohm stable in stereo.

  • Four-Channel (CEA 2006 Compliant): 60 watts x 4 channel RMS @ 4 ohms (20 Hz-20 kHz, 1% THD)
  • Four-Channel (2-ohm): 90 watts x 4 channel RMS (1 kHz, 0.08% THD)
  • Bridged (4-ohm): 180 watts x 2 channel RMS (1 kHz, 0.08% THD)
  • Peak Power: 180 watts x 4 channel (720 watts total max power)

Cast Aluminum Heat Sink: The Kenwood KAC8405 utilizes a cast aluminum heat sink design to ensure that the amplifier stays at its optimal temperature.

Fan Cooled: There are two fans and two vents located on the back side of the amplifier to help dissipate heat and ensure cool, reliable operation. Make sure not to block these vents or fans when you install the amplifier.

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

  • Speaker output contacts ground
  • Speaker wire short-circuits
  • Unit malfunctions and DC is sent to speaker output

Aluminum Cover Plate: The amplifier's controls and connections are hidden under a removable extruded aluminum cover plate. The cover plate provides a professional looking installing while helping to protect the amplifier's connections and control settings. The cover is held in place by two hex head screws. An allen-wrench is supplied to remove the cover.

Blue/Red Illumination: The Kenwood Four-Channel amplifier features a blue and red LED illumination when the amplifier is turned on. When the power is turned on to the amplifier, the Power indicator will light up red. This indicator will turn off with the amplifier and will turn off if the amplifier goes into protect mode. The amplifier also features a Blue LED lamp on the top of the amplifier which illuminates when the amplifier is on.

Signal-sensing Turn-On Circuitry: When the speaker-level input is used, it is not necessary to connect the power control wire (turn-on lead). The amplifier senses the signal from the speaker-level input and turns the amplifier power on automatically. Shortly after no signal is detected, the amplifier will automatically shut itself off.

Controls

Stereo/Mono Operation: You can independently switch Amplifier's front and rear channels from Stereo to Mono operation. When switched to Mono, the signal from the left channel inputs are only used.

Gain: To accommodate the varying range of signal levels coming from today's factory and aftermarket radios, the Kenwood KAC-8405 features an adjustable, independent gain control (0.2-5.0V) for the front and rear channels. This means that no matter what kind of radio is connected to this amplifier, the appropriate gain control adjustment can be made to ensure loud, clear, distortion-free music.

Crossovers: The KAC-8404 has built-in high pass and low pass crossovers. The high pass crossover's slope is 12 dB/octave and is continuously variable from 50Hz to 200Hz and can be controlled independently for the front and rear channels. The low pass crossover's slope is also 12 dB/octave and continuously variable from 50Hz to 200Hz and can be controlled independently for the front and rear channels. The amplifier can also be operated at full-range simultaneously for both the front and rear channels.

Bass Boost: A fixed bass boost of 18dB at 40Hz can be engaged for the rear-channels only. There is no bass boost for the front channels.

Connections

Power Connections: The power, ground, and remote turn-on connections are 0.3125" wide screw terminals that will accommodate up to 8-gauge wire. A Phillips-head or flat blade screw driver (not supplied) is required to tighten/loosen the terminals. Spade connectors are recommended for the power, ground, and remote wires.

Speaker Outputs: The Kenwood KAC-8405 is equipped with four pair of speaker terminals. All eight speaker terminals are 0.3125" wide  screw terminals and will accommodate up to 8-gauge wire. A Phillips-head or flat blade screw driver (not supplied) is required to tighten/loosen the terminals. Spade connectors are recommended for the speaker wires.

Note: The speaker output terminals can be used in 4-channel mode or bridged to 2-channels.

Line Level Input: The four-channel amplifier is equipped with two pair of gold-plated RCA line level inputs.

Speaker Level Input: The KAC-8405 comes with a four channel speaker level input harness. Once you splice the 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 to a receiver with no preamp outputs. The maximum power output from the source receiver can be no more than 40 watts.

Fuses: The KAC-8405 is equipped with two 30 amp ATO blade fuses.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Articles