I have a 2005 x-terra. Just got it from my dad and only the front 2 speakers on the dashboard work. My dad didnt care about music so he didnt mind but i do. I took it to a shop and they said it would cost 100 just to check it out. They told me that it could be the amp has blown or the speakers are blown or maybe both. What i want to know is if anyone has seen this and if it could be fixed without taking it to a shop. Thanks.