Must agree with Jim. Leave it on = always warm; it will sound better that way & no transients to cause problems.
"Pop" in pre-amp
I recently purchased a used B&K Pro-10 pre-amp on-line. Whenever I turn it on, there is a "pop" in the speakers. This also happens if I switch in or out of the direct bypass mode. Does anyone have any idea what it might be? Is there a quick fix? Or do I need to take it in to be serviced or repaired? Thanks.