Value, Quality & Service since 1980
Static can come from 2 main sources:
Lightning from the sky, AND, shock from your fingertips. Both will cause permanent damage to your mixer input circuits. Mixer inputs are very sensitive; they have to be to amplify the small level of signal coming from a microphone up to sound system levels. These sensitive circuits are easily damaged by high voltage spikes, such as static.
Q. Will a surge suppressor help protect from static ?
A. No, not at all. In fact they really don't do much of anything except cost money. There is more protection inside your mixer or amp than that little MOV inside the outlet strip.
Q. Will it help to turn off the power before I plug in my mics etc. ?
A. No. The static entering the input circuit can destroy the components even if the power is off.
Q. Is this covered by warranty ?
A. No. Think of it like your car crashing into a tree. It is not a manufacturing fault. It is an accident. One that is preventable. (It might be covered by your insurance like a car accident but that depends on your insurance policy.)
Q. Can static damage be repaired ?
A. Yes, but it means taking apart the entire mixer and replacing the damaged parts, then re-assembling the mixer and testing it. VERY EXPENSIVE !
Q. How do I prevent static damage ?
A. In the case of lightning, little can be done. If everything were unplugged from power, and all mic input wires were unplugged from the mixer before the lightning strike, this would help.
In the case of static from your body, all you have to do is touch the screw of an outlet plate or light switch BEFORE inserting the mic cord plug into the wall plate jak or extension mic cord. If you receive a shock, this might have caused damage to your mixer. The shock also discharges the static and therefore no longer presents a problem.
The point is: don't just walk across the room and plug in a mic cord, especially in the winter when the air is dry;
THINK ABOUT THE STATIC and DISCHARGE first !