Sound proofing

[shaddady34]

I have 60 sq ft of sound deadening mat. I have already sound deadened front 2 doors and rear hatch. Will sound deadening the 2 rear doors with no speakers in them make the audio system sound better. Also, where else should i install more mat

[camarors8992]

I have 60 sq ft of sound deadening mat. I have already sound deadened front 2 doors and rear hatch. Will sound deadening the 2 rear doors with no speakers in them make the audio system sound better. Also, where else should i install more mat

I covered my floors with it and it make a big difference, the hatch made the most however.