Help with Audio from A/V/S-Video Mod...

[goombakid]

Since I figured out my S-Video problem, I noticed now that the audio tapped from the expansion port gives me soft sound (have to turn my TV's sound up higher than usual to get decent sound). I've added a 10uF cap inline to the connections, but still have soft sound issues. Through RF (before I took it out couple nights ago), sound was fine at nominal volume levels.

I've had this problem when I first did the A/V mod a year ago, just now came around to clean up the install and add S-Video. Any tips?