I recently purchased a new 2010 Ford Edge Limited. It has the Sync audio system with the 6cd in dash changer and Sirius satelite radio and a sub woofer in the right rear cargo area. My problem is the sub emits a continuous tone estimated between 400 and 600 hertz even with the volume turned all the way down. It is not affected by the vehicle running or not, but is almost masked out by normal road noise and engine sounds. It can be heard from the drivers seat when there is no audio and this is when it is most noticable. The only way I can make it change is to switch the source to AM radio. The tone goes away but there is still a scratching sound coming from sub speaker. Changing Balance and Fade have no effect.
The dealer compared to other vehicles similarly equipted and says they do the same thing. They also consulted with Ford tech support who states this is a normal charecteristic. They pretty much refused my request to isolate if the source of the noise is coming from the radio, the sub amp, or possibly the factory remote start system.
I'm pretty bummed that they have no fix or interest in fixing what I consider unacceptable for any audio system. Anyone out there have any similar experience or recomendation???
I'm considering consulting with a local audio shop about replacement with an aftermarket amp but without knowing if that is the source that cound be a futile effort as well.
