Alpine Underground

whats up everyone, i own a '02 nissan pathfinder. in the front i have the IVA-D310 and the iPod KCE-420i hookup.  i have the SPR-17S component system in the front and type-r speakers in the back, which are powered by the MRV-F345 4-channel.  i have 2 MRD-M1005 mono amps powering 2 12" RE Audio SX subwoofers.  the 3 amps are connected to the head unit by the KCE-511M.  all power wire is Stinger and all RCA connect are JL Audio.  the components were tuned by me and sound pretty loud and clear.  my friend with Focals said that his dont sound as clear or as loud, but i guess his cartoys install didnt come with any tuning! ha