I replied to this about 4 hours ago from my email account and it never showed up, so I'm trying again directly on the Yahoo group site. All I said was
"I’m not hearing it, but then the high frequency response of my ears is not what it used to be. With the output switch at “OFF”, the output is grounded, so how can it possibly get any signal? Bad ground and bleed from the headphone output? But then it would be affected by Cutoff, etc. Do the Effects affect it in any way?
Don B."