Hello,

i just bought Mazda 6 2003 model, and noticed that the radio volume goes up to 30 or 40 but the sound its very weak, you can barely hear the radio.
Does anyone knows what can be the issue? should i start checking the speakers or the amplifier?

 

Bose or non bose system?

If bose, I would suspect the AMP. Non bose would either be dead speakers or a dying head unit.

 

You can check if the speakers or the smplifier is blocking by any dust etc. and clear the dust around it. If it still can't be fixed, maybe it is broken and you'd better take it to a repair shop to fix it.