Hi all, just noticed last night that my car has this low humming sound whenever I give it a little gas around 2k rpm with any speed above 60-65mph. Once I past 2k, the noise went away. This does not happen with city driving speed. Anyone has similar noise? TIA!
this is on a 23 awd aspec.

 

From the speakers, the engine, or ?

 

Coming from the engine. Yes, it does sounded like those annoying humming sound when you added an external subwoofer and not disconnecting the anc. But this only happened with higher speed like above 60mph. But if my rpm is already above 2k, there won't be any noises with increasing rpm. My anc are unplugged front and back as well.