Responses from pyrolator

Tube preamp for pass labs ?
I have Pass 250.5 with Conrad-Johnson Premier 10 and 18. Excellent match. Driving the original Revel Salon Ultima.   
Floating ground in the apt. Building
I bought that spool from VH Audio 20 years ago and cut the ground wire by 5 inches because I always floated the ground.  yes, all outlets are in metal boxes.  my line is an outside line with external 1 gang outlet metal box.  my power distribution... 
Floating ground in the apt. Building
I didn’t create a secondary grounding system. Just extended current ground by 5 inches to reach the circuit breaker’s grounding screw.   
Hearing other appliances in dedicated line
Loose connection on the audio system circuit or on other lines?