Spectron Musician trun on noise / tweeter hiss

My Musician III SE MK2 with the vcap / bybee upgrades was just delivered and after setting it up and hitting the power switch a cracking static was momentarily heard from my speakers. The same was true when the power is turned off.

I realize that most amps generate an audible hiss that can be heard when you put your ear near the speakers tweeter, but the Spectron seems louder than most.

Do other owners share the same experience??