KXA400.4 Amplifier
KICKER® KX amplifiers deliver unrivaled power and sonic quality.

KXA400.4 Amplifier

This KX 400-watt four channel amplifier is built to easily power your door speakers or be a full system solution. FIT2™ (Fail-Safe Integration Technology) ensures your amp works with nearly any stock or aftermarket radio.


  • Class D Power Plant
  • Gain Control With "Optimal Input" Indicator. Test tones available here!
  • FIT2™ (Fail-Safe Integration Technology) Circuitry
  • Variable 24dB Crossover
  • DSP-Controlled Preamp
  • KickEQ+™ 18dB Variable Bass Boost
  • Easy Access to Settings Behind Hinged Panel
  • Black Anodized Aluminum Chassis
  • Top-Mounted Red LED Light Pipe

Want setup help? Go to KICKER U for a free woofer & amplifier configuration app!

This KX amplifier delivers as much as 100 watts per channel (4 channels driven), or 200 watts into two sets of bridged channels. See below for more details.

RMS Power [Watts]
@ 14.4V, 4Ω stereo, ≤ 1% THD+N: 50 x 4
@ 14.4V, 2Ω stereo, ≤ 1% THD+N: 100 x 4
@ 14.4V, 4Ω bridged mono, ≤ 1% THD+N: 200 x 2
Length [in, cm]
11-316 , 28.4
Height [in, cm]
2-⅛, 5.5
Width [in, cm]
8-516 , 21
Frequency Response [Hz]
Input Sensitivity:
Signal-to-Noise Ratio
Selectable Electronic Crossover
Amp 1: OFF/HP/LP; Variable 10–5,000Hz with X10 switch
Amp 2: OFF/HP/LP/BP; Variable HP, 10–500Hz;
Variable LP, 40–5,000Hz with 10X switch
Slope: 24dB/octave
KickEQ™ Bass Boost
0-18dB @ 40Hz
CEA Power
50 x 4 @ 4 ohms, 14.4VDC, 1% THD, CEA-2006B (Watts)
CEA Signal-to-Noise Ratio
-75dB CEA-2006B (ref: 1W, A-weighted)


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