Hi,
I plugged in my bottlehead crack since the last time (a few months ago) and notice a Hum. With RCA plugged in, but no music playing, Hum does not exists at 0 volume but as you increase the volume, the Hum increases. With RCA disconnected, I hear a different noise. More like a buzz.
When music are playing, it sounds great and you cannot notice the Hum or noise.
Any ideas appreciated.
Thanks.