low input = using RCA cables as input, the normal & better way
high input = using speaker cables, convenient for players with no rca pre-output, like OEM players, but sound quality not so good, also noise inducing sometimes
I'm interested to know more abt mitsubishi GTA...What do you think abt it? Btw, is it hard to do maintenance/expensive? Btw, whats abt the FC? Any ideas?