Finished my audio upgrade to my 2016 Crosstrek Premium. It was a hell of a lot of work but well worth it. The sound is stellar and it's a much quieter ride.
Kicker HS8 Hideaway Sub under drivers seat
Alpine MRV-F300 Power Amp under passenger seat
Kicker Dash Tweeters
Kicker 40CS654 6.5 inch 2-Way Speakers in all doors
10+6 wire harness from ae64.com wired up and shrink wrapped.
4 gauge battery cable with a Stinger Fuse block. There's a spare wire holder which holds the new battery cable nicely.
Closed cell foam attached with heavy duty Velcro inside all doors.
Frost King applied to all doors and floorboards
Alpine MRV-F300 Power Amp under front right seat