Just recently I started to hear some feedback, popping in my speakers on my 2004 G35 Sedan with bose. I dont abuse my speakers and hardly ever have them turned up loud. I was also having problmes where my radio head unit would be on but would have no noise going to the speaker, I would turn the radio on and off a few times and still nothing. If turned my car off and back on they would normally work again.

A week ago my front speakers made a loud popping and no longer work, I am assuming those blew.

Now my subwoofer is sometimes making a long buzzing farting noise when the radio is turned on and off then stops randomly.

I am also now assuming this is not an issue with the speakers themselves but either the amp or wiring.

I have searched on the net and notice someone posted a known issue with the Car stereo circuit board for the 03-04 G35s, reporting no sound as a possible issue.

Any suggestions on what to look or check on first would be great.

 

The amp uses the same signal to create the subwoofer channel as it uses for the rear speakers, so if the rear speakers are doing fine and the sub sounds bad, it really points to the amp., but, by using a multimeter to check the speaker signals going in and out of the amp it should be easy to tell whether it's the amp, headunit or speakers that are failing you.