Always make any connection changes with everything unplugged.
Try shutting your power amp itself off first, using its own power switch, while music is playing. This will help discharge the capacitors in your amp, that stores power like a battery. Then unplug all to make changes.
I'm thinking part of it is the power stored in the amp. The static electricity Chuck mentioned is a big possibility too. If your charged with static electricity and touch an interconnect going to a component, you could damage something.
Try shutting your power amp itself off first, using its own power switch, while music is playing. This will help discharge the capacitors in your amp, that stores power like a battery. Then unplug all to make changes.
I'm thinking part of it is the power stored in the amp. The static electricity Chuck mentioned is a big possibility too. If your charged with static electricity and touch an interconnect going to a component, you could damage something.