Buzzzzzing Transformers

Tphalieros, the "loose transformer" tweak makes sense. The 60HZ vibration from the transformer was decoupled from the PC boards etc. in the amp and removed a colouration. A rubber mount system would probably have a similar but safer effect. You see this in some amps (YBA being one) or a separate box entirely for the power supply.

Go to psaudio.com as they have a section on transformer buz! very interesting article! Happy Listening!

T,
Your amps were originally made by some nice guys in New Jersey. The originator was Roger Paul. He has a new company that makes a preamp that I think is called Hcat. He has a website that I can't remember. He probably could give you some advice. The Photon was a great amp.

The amps aren't plugged into the PS 300, are they?

I just demo'd a "home-made" power amp and could hear the transformer hum from across the room. What a p.o.s.
Then the mfg'r bashes my stereo as the problem for his poor workmanship. That won some points - NOT!