I am the owner of the K2 S9800SE. Due to measuring with my DEQX HDP3 the mic started oscillating. The volume of the mic was set to high.
So the tweeter is damaged. I contacted harmansupport. They told me that there are no diaphragms for the UHF tweeter, the 045BE. I dont understand this. For such an expensive speaker.
I own for more then 40 years JBL products. This never happened to me. Is this the new policy of Harman? The only option is to buy a new tweeter.