The 740mp (premier HU) has got 3 sets of pre-amp outputs. The 7400mp has only got 2 sets like TrUjAp said.

The 8400mp/840mp adds WMA capabilities and a really trick motorized face. But, is it worth an extra $150 for merely a style item???




1999 SVT #900/2760
Born on 1-20-99
Silver Frost/Midnight Blue
A few aesthetic and audio mods