Unwanted feedback coming through sub

[hardrock2401 8]

I just got my amp yesturday and whenever I power on my indash or change songs the sub has like a popping feedback that comes through. I have been trying to find similar problem on here and always sounds like people point out a cheap indash as the problem (my indash is a cheap kenwood lol). What are your guys opinions.

[95Honda 486]

Feed back is caused by a loop, don't think you have that.

Need a new deck...

[hardrock2401 8]

Figured lol, but on a side note....what would cause a deck to do that? Just old age, cheap build, mix of the both?