The CX 300.4 Four Channel Amplifier is built to power all your door speakers in a small, powerful package. Using a Class D power plant, this amp features a variable bass boost with KickEQ, giving you as much as a 12dB of extra bump. A powerful 12dB crossover is included, letting you quickly tune your system to perfection. Use the full range outputs to expand your system with a full range amp to complete your system. This CX amplifier delivers as much as 75 watts per channel (4 channels driven), or 150 watts into two sets of bridged channels. See below for more details.