you have to go to the dealership, sorry.
this pw was designed to keep thieves from stealing the radio.
go to the acura dealership, and before that check your glove box for a white sticker with 5 digits that may be the code.
look for a white sticker similar to this.
http://www.team-integra.net/images/BAEC1978-D3A7-4405-AB2D-2761DC15A96D/articles/morningz/radio_code_glovebox.jpg