Here is a little unit I put together using elduderino's helpful instructions.

http://seanberry.com/acura/rca_conversion.jpg
http://seanberry.com/acura/rca_conversion2.jpg

And here is a wiring diagram since his insrtuctions listed here:
https://acurazine.com/forums/sho...09&page=3&pp=25
seems to not be available any longer.

http://seanberry.com/acura/04tsx_audiosystem.jpg

Elduderino's instructions are at:
https://acurazine.com/forums/showthr...9&page=3&pp=25