The Connects2 CTLOC4 is a line output converter that converts speaker-level signals into RCA outputs to allow connection of aftermarket amplifiers to factory head units. It provides a remote turn-on function to power amplifiers when the factory radio is active.

Connectivity includes two channel speaker-level input and two channel RCA output connections plus a remote turn-on lead for amplifier control. The CTLOC4 is intended for use where a head unit lacks dedicated RCA preouts.