The AudioControl LC1i is a two-channel active line output converter and line driver designed to convert speaker-level outputs from factory head units into preamp-level signals for aftermarket amplifiers. It accepts high-voltage speaker inputs and provides two-channel preamp outputs for subwoofers or full systems.

The LC1i features selectable input impedance settings for difficult OEM systems, GTO signal sense, audio sense, and a 12 V remote input plus a 12 VDC remote out. Compact construction and ground isolation switch simplify integration and the LC1i can remain in the system as a line driver after future head unit upgrades.