I just got my Pioneer 9400 installed two weeks ago. Everytime I start the engine I get this little whiny sound coming from the front left speakers. As I rev the engine, the frequency reflects that of the engine. When I shut off the engine, it makes this clicking sound for a couple of seconds after everything is off. What's up with that. Any ideas? I have the headunit, Infinity components, and one of those Infinity BASSLINK sub/amp combos in the back. Help!