I have Sony CDX-A250 with rear 6x9 speakers driven by 300Wamp. Every thing works fine unitl engine is turned off and system is running from battrey. Although battery is little weak but works well to drive audio system.
The problem arises whenever i start my car and drive, i can feel significant bass loss. I can't say it's completely gone but it doesn't feel solid bass as it feels when engine was turned off.
there is no alternator whine or any other distortion. Tell me if it is really a problem ?