The Kicker CXA3604 is a four-channel Class A/B car amplifier designed to power all door speakers from a single compact unit. It provides up to 90 watts into four full-range channels or 180 watts into two bridged channels and accepts high-level speaker inputs to integrate with factory systems.

The amp features a variable KickEQ bass boost up to 6dB, a 12dB crossover for precise system tuning, FIT+ fail-safe integration technology for noise rejection, and efficient heat sinks for reliable cooling. It installs in most 12V vehicle audio systems and removes the need for external line-out converters by accepting up to 40 volts of speaker-level input.