The L.O.C.PRO LP7-2 can be used for either replacing an OEM radio and retaining the factory amplified system or adding amplifiers to a system that does not have RCA outputs. L.O.C.PRO LP7-2 will also monitor the audio input signal and automatically create an amplifier remote turn-on for systems that do not have one. Level matching is achieved using precision stereo gain dials and will enable proper adjustment of audio output of the radio for optimum system performance. Differential inputs also allow for use in OEM BOSE and other premium system scenarios. Included in these instructions are the most common applications for the L.O.C.PRO LP7-2. Built-in remote turn-on circuit Accepts both high level and low-level input Single Stereo Gain controls Ultra-compact housings - achieved by recessing transformers into the circuit board High Power - conservatively rated @ 55watts per channel Full 20Hz to 20kHz frequency response (+/- 1.5 dB) Single harness design Wire-tie or screw mounting provisions