potentiometer switch stereo
The switch is rated at 12 V DC and 1 A. 

That means it can be used on circuits up to 12 V DC and can switch currents up to 1 A.

Your circuit is 16 V which is a bit beyond it's rating. It would probably be OK if the current is a bit lower than 1 A - perhaps &lt; 0.8 A as this reduces the load the switch has to connect / interrupt. (The arcing during switching is what causes wear and tear on the switch contacts.)