I recently bought a SR4 and I must say it's the best bass I've ever picked up, but when I hooked it up to my amp and played a song I noticed the G string was really weak compared to the other strings. The string sounds just as loud as the others when not amplified, so my guess was it's the pickups. Is this normal for Stingrays? Should I raise the pickup where the string is? Any suggestions would be appreciated. Thanks!