Someone recently on the forum had a problem with his stator which went away after plugging and unplugging several times.
Do you have an Aerius i, or an orginal Aerius? I'm not sure what Aerius "1" means, sorry.
Is the speaker a bi-wire model? Check the connection.
Did you try switching out the leads with the other speaker?
A conventional dynamic speaker such as your woofer acts as a piston in the voice coil. Perhaps it just caught up on something and needs to be tousled about a little to get unstuck.