Around here we leave headphones plugged in and power up and down Crack amps and our other amps with expensive headphones a lot and we don't have any problems. But if you are worried about pops the logical approach would be always plug in headphones (into any device, not just ours) after you have powered it up and always pull them out before you power it down. And always make sure the attenuator is turned all the way down before you plug the headphones in, i.e. always roll it down after you use the amp.
« Last Edit: June 27, 2012, 03:17:00 PM by Doc B. »
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.