Hi Keith
It is the soft-start circuit and is normal.
james
James
This is not the initial soft-start sound. That happens on startup but then while the amp is powered up there is a constant in-rush/clicking that occurs repeatedly every couple of seconds or so.
I just pulled the amp out of the rack and peered inside the top vents. I can hear the inrush/buzzing at the back of the amp but then there is a constant clicking at the front of the amp (and there is a green light flashing inside the amp (at the front) that corresponds to each click.) I can't see what the light is since the top is still on the amp. The inrush is not the same as at startup...it's more of a buzzing before each click.
This is not normal as my amps have always been completely silent at idle ever since I've had them. This only started happening tonight. Each click is clearly audible from across the room.
Here's a link to the video on youTube....
https://youtu.be/VOUw8fCoZDUKeith