Upgrade your audio system with this all‑in‑one bundle that combines the best of subwoofer amplification and signal conversion technology. The Kicker CXA4001 CX Series Mono Class D Subwoofer Amplifier is engineered to deliver 400 watts of dynamic bass power using an optimized circuit layout and premium internal components. With its variable 12dB crossover, KickEQ 6dB variable bass boost, and 24dB subsonic filter, this amplifier offers precise control over low‑end frequencies. Its one‑ohm stability and ability to accept anywhere from 9 volts to 40 volts (up to 400W of speaker‑level input) make it an ideal choice for custom installations, whether mounted vertically or horizontally. Complementing the amplifier is the LC1i 2‑Channel Line Output Converter & Line Driver. Designed to seamlessly integrate with both aftermarket and factory audio systems, the LC1i converts high‑level speaker signals into clean, robust line‑level outputs (up to 9.5 Vrms). It features advanced auto turn‑on capabilities via DC offset or audio detect and includes load selection switches to accommodate OEM integration, preventing factory stereo shutdown with its switchable load resistance. Its compact design, complete with level control and a maximized LED indicator, ensures that you get the best possible preamp signal now and for any future head unit upgrades. Together, this bundle provides a professional‑grade upgrade solution that delivers superior bass performance and signal clarity. Whether you're building a custom sound system or upgrading your factory setup, enjoy enhanced audio control, flexible installation options, and dependable performance—all in one powerful package.