OK guys, this problem actually started when I first put my sytem in alto. However after a passage of time like around 3-4 weeks, it vanished on its own. Recently it started again after I got some body repairing in my car which should be done after taking the engine out and so the wiring.
for reference
Last time I tried putting different RCAs, power cable, grounding,fuse and also grounding the player using a wire but it didn't helped back then.
Now my observation which I think might be important to figure out this issue
-clipping sound comes every 20 to 40 seconds
-if I put my amp on high frequency the time gap b/w each clipping sound increases
-however, the front factory fiited speakers of the car which are directly wired also clip ( which means clipping is consistent in all four speakers)
-If I switch off the engine the clipping ends.
-no engine noise coming in speakers.
A shop guy said it could be because of the central locking
I think it could be because of the ground wirring
Another friend said changing fusses of the amp and one in the front might help
and well PLEASE HELP!