This is what Sterling Ball said back in 2005: This trait has been around since the first day of the stingray. Its is NOT a byproduct of wood. It is due to the active preamp used on the bass. The output isnt actually lower the response is thinner sounding or not as fat. IT is one of the things you get used to with a Sting Ray or not. Believe it or not it was a complaint of mine in the beginning when I worked with Leo. The emerging slap and the old school country click players loved it. That thin snappin G sound helped the Sr taked off. You can try flats and it will help, but chances are that you will bet used to it by playing ...
So this is typical for a stingray - with this in mind. my g string is a bit higher than my e string due to the alignement of the polepieces with the strings. i pushed my pickup a way more up on the treble site and it worked perfect. it you dont like the thin sounding g - the stingray is not the right bass for you.