had a horrible time finding the wire color for the antenna booster. and i finally found a pinout so i figured id post it up to help others. so here it is. i looked on the site and its the same for 08-10. just fyi.



2010 Subaru STI Car Stereo Wiring Guide
Car Radio Battery Constant 12V+ Wire: Blue/Red
Car Radio Accessory Switched 12V+ Wire: Yellow/Red
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Violet
Car Radio Dimmer Wire: Black/White
Car Radio Antenna Trigger Wire: Yellow/Black
Car Radio Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A

hope this helps someone out. i sure could have used this last night...

Car Audio Front Tweeter Size: 1″ Tweeters
Car Audio Front Tweeter Depth: 1″
Car Audio Front Tweeter Location: N/A
Left Front Speaker Positive Wire (+): White/Red
Left Front Speaker Negative Wire (-): Red/Black
Right Front Speaker Positive Wire (+): Green
Right Front Speaker Negative Wire (-): Brown/Yellow

Car Audio Front Speakers Size: 6 1/2″ Speakers
Car Audio Front Speakers Depth: 2″
Car Audio Front Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Blue/Orange
Left Rear Speaker Negative Wire (-): White/Black
Right Rear Speaker Positive Wire (+): Red/White
Right Rear Speaker Negative Wire (-): Gray/Green

Car Audio Rear Speakers Size: 6 1/2″ Speakers
Car Audio Rear Speakers Depth: 2″
Car Audio Rear Speakers Location: N/A
Car Subwoofer Speaker Positive Wire (+): N/A
Car Subwoofer Speaker Negative Wire (-): N/A
Car Subwoofer Speaker Size: N/A
Car Subwoofer Speaker Depth: N/A
Car Subwoofer Speaker Location: N/A