
Originally Posted by
markygy
May kinabit ka ba car audio gear lately or everything is oem stock? If everything is stock, then you should check your battery. A whining sound coming out of your speakers is one indication that your battery is about to fail. Kung nag palit ka naman nang HU lately or added for example a external amplifier then hanapan mo nang bagong grounding point ang either HU mo or yun external amplifier.