Hi, ask:
1) when I put (in my new st-70) my finger on the tube i can feel very little vibration. (similar to that of any large transformer)
this vibration in all chassis.
This is normal ?
2) I can hear a little hum when I turn on the amp on the baffles. (with the volume 0) this is normal ?
this hum , may be due to low quality tubes ? (jj)