Are you legally able to receive your personal property back in a vehicle that has been repossessed including after market stereo amp and speakers?

Personal property you will most definitely be able to get back. A stereo, amp, and speakers, it is doubtful. These items have been affixed to the vehicle and are now apart of the car. But the ultimate decision will be up to the lender. Seems if you had been making the payments, your first priority, instead of buying expensive audio equipment you would not be in the fix you are in, right. Learn from this mistake.