Ping sound
 

I start to get a pinging sound in my rear speakers when I play a song with some bass in it. It gets worse when I accelerate!? It also dosen't do it when I first start it up. Did I blow my rear speakers? I wouldn't think I have because the owner before me (My Grandparents) never used the sterio?!

Please HELP! It's driving me NUTES! :x

id say they are getting bad....try swapping it out w/ the left side on and see if you get the same thing....and another thing...watch those b oschs they dont like our cars very well....i ran them for like 6 months...car didnt run real good so i changed to ngk tr55s and it runs perfect