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Item# 46443
Kicker 40KX4004 - $299.95
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Kicker 40KX4004

Item# 46443

Condition:  Brand New

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50 watts RMS x 4 - 4-channel car amplifier

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Your Price $299.95

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vehicle fit guide

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What's Included:

  • 4 Flat washers
  • 3mm Allen wrench
  • Product Information Inside Box
  • 4-Channel amplifier
  • Four 2" Self-tapping screws
  • Owner's Manual (English/ French/ Spanish/ German)
  • Power certificate

Product Highlights:

  • variable low-pass filter (10-5000 Hz, 24 dB/octave)
  • variable bass boost (0-18 dB at 40 Hz)
  • ront-mounted controls protected behind fold-down door with magnetic latches
  • preamp outputs
  • no onboard fuses — when installing multiple amplifiers in a system, an additional 80-amp in-line fuse between the distribution block and this amplifier is recommended
  • preamp and speaker-level inputs (speaker wire to RCA adapter required for speaker-level input)
  • variable bandpass filter (10-5000 Hz, 24 dB/octave)
  • 50 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
  • 11-3/16"W x 2-3/16"H x 8-3/4"D
  • 4-gauge power and ground leads and an 80-amp fuse recommended — wiring and hardware not included with amplifier
  • 4-channel car amplifier
  • 200 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
  • variable high- and low-pass filters (10-5000 Hz, 24 dB/octave)
  • variable bass boost (0-18 dB at 40 Hz)
  • variable high-pass filter (10-500 Hz, 24 dB/octave)
  • Class D amp technology
  • Fail-Safe Integration Technology eliminates noise from your vehicle's electrical system

The KX 400.4 Four-Channel Amplifier is built to power all your door speakers in a small, powerful package. Using powerful Class D technology, this amp features FIT™ (Fail-Safe Integration Technology) – giving you superior power, clarity and dependability. A powerful 24dB DSP (digital signal processor) controlled crossover and 24dB subsonic filter is included, letting you quickly tune your system to perfection. Use the full range RCA outputs to run another KX amplifier off of the same signal. This KX amplifier delivers as much as 100 watts per channel (4 channels driven), or 200 watts into two sets of bridged channels.


THD at Rated RMS Power 1%
Speaker Level Inputs RCA
Preamp Outputs 1 pair
Width (inches) 11-3/16
Bass Boost Frequency 40 Hz
Signal to Noise Ratio 75 dB
High-Pass Crossover Frequency 10-5,000 Hz
RMS Power Output (Watts x Channels) 50 x 4
Bridged Power (Watts x Channels) 200 x 2
Minimum Impedance Bridged 4
Best Frequency Response 10-20k Hz
Power at 2 Ohms (Watts x Channels) 100 x 4
Low-Pass Crossover Frequency 10-5,000 Hz
Input Voltage 14.4v
Fuse Rating 80
Peak Power Output (Watts x Channels) 200 x 4
Minimum Impedance Unbridged 2
Amplifier Class D
Low-Pass Slope (dB/octave) 24 dB/octave
High-Pass Slope (dB/octave) 24 dB/octave
Bass Boost 0-18 dB
Fan Cooled No
Height (inches) 2-3/16
Depth (inches) 8-3/4
  • UPC: 713034065821
  • Weight: 7.1
*Warranty: 1 Year warranty.
1 Year warranty from implies that repairs must be returned to, not the manufacturer. More information can be found in our help section under returns & warranties.
What's not covered : Misuse, abuse, defacement, physical damage of any kind, and improper installation / operation. Video and multimedia equipment with damaged or cracked screens.Subwoofers and speakers are not warranted against being blown, burned or abused.
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