PWM audio issue: Bass Massacre

[kirestus]

hey guys, i have built a little circuit to filter out the pwm audio found on the forums here, and it works for the most part but anytime there is any really low Bass it overpowers everything else.

im talking like 4 times louder. im not sure if it is from the pwm audio or if i screwed up my filter somehow.

any insight on this would be great!