The CXA360.4 Four-Channel Amplifier is built to power all your door speakers in a single, powerful package. Using Class A/B power, this amp features a variable bass boost with KickEQ, giving you as much as a 6dB of extra bump. A powerful 12dB crossover is also included, letting you quickly tune your system to perfection. CX-Series Amplifiers accept up to 40 volts (400 watts) of speaker-level input signal. This kind of flexibility both makes line-out converters unnecessary and optimizes your sound quality at the same time. Highly efficient heat sinks keep the amp cool with a sophisticated new look, while KICKERs FIT+ (Fail-safe Integration Technology-PLUS), gives you outstanding noise rejection - even with premium factory audio systems. This CX-Series Amplifier delivers as much as 90 watts into four full-range channels, or 180 watts into two bridged channels. Features - Class A/B full-range channels Three-second turn-on/off delay to eliminate unwanted interference Variable 12dB crossovers provides control to dial in perfect sound KickEQ 6dB variable bass boost for those additional low frequencies FIT+ (Fail-safe Integration Technology-PLUS) means it works with nearly every radio Accepts up to 40-volt input signals Small footprint for easier installation Vertical mounting hardware included for another unique look Compatible with CXARC Remote Bass Control (AMP2 must be in LO-PASS X-OVER mode)