Hello,

I am new at the forum, and I am glad to be here.

Neumann microphones are my foremost interest, and I am delighted to be here.

I have a pair of KM 84, which are my first vintage microphones.
My beginner's question is , how often , and how regularly should I
send them to inspection ?
Or,do you recommend to send them only when they have some noticeable problem ?
I was wondering if these older mikes do need any regular preventive checks / i.e. 2 x a year etc /

Thank you !