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
The M-Spec has been on sale since the 8th of, 2001 and is the result of the first change to the GT-R made by the new team of engineers headed by Kazutoshi Mizuno (the former chief engineer at Nissan Le...