Kicker KX4004

4-channel car amplifier — 50 watts RMS x 4

Kicker’s KX400.4 4-channel amplifier will power your front and rear speakers with 50 watts RMS each, bringing brilliance and clarity to your sound. This reliable and compact KX Series rocker remains cool even when pushed hard, thanks to its high-mass heatsink, high-tech internal components, and efficient full-range Class-D amp technology. Building a system and wondering what to buy first? You could start with this amp in 2-channel mode to drive a couple subs with up to 200 watts each, then switch the amp over to power all your speakers when you get a bigger sub amp.


RMS Power Output (Watts x Channels) 50 x 4
Peak Power Output (Watts x Channels) 200 x 4
Power at 2 Ohms (Watts x Channels) 100 x 4
Bridged Power (Watts x Channels) 200 x 2
Minimum Impedance Bridged 4
Minimum Impedance Unbridged 2
Best Frequency Response 10-20k Hz
THD at Rated RMS Power 1%
Signal to Noise Ratio 75 db
Input Voltage 14.4v


Amplifier Class D
Low-Pass Crossover Frequency 10-5,000 Hz
Low-Pass Slope (dB/octave) 24 dB/octave
High-Pass Crossover Frequency 10-5,000 Hz
High-Pass Slope (dB/octave) 24 db/octave
Bass Boost 0-18 db
Bass Boost Frequency 40 Hz
Fan Cooled No
Fuse Rating 80
Speaker Level Inputs RCA
Preamp Outputs 1-pair
Width (inches) 11-3/16
Height (inches) 2-3/16
Depth (inches) 8-3/4
Parts Warranty 2 years
Labor Warranty 2 years