I found the source of my problem. I took off the back panel and noticed that the metal wrap around grill is vibrating against the frame under the back plate. I fixed most of the vibration by jamming pics between the frame and the edges of the grill.
The long-term fix will be to install adhesive gasket tape under the edge of the grill. I can either wedge the gasket under the grill or completely disassemble the amp. I know complete disassembly is the proper way, but cracking this puzzle box gives me nightmares. I am afraid of causing more problems.
***Adding on for visibility purposes***
We are aware of the reports of the AMPLIFi’s back panel vibrating under certain conditions. Although we have not found this to be the experience of all who use the amp, we take the reports seriously and are actively working on diagnosing the root cause and finding a solution. We will update the community as pertinent information is made available to us.
We apologize to those who’ve had this experience, and we ask that you remain patient with us as we define and implement the solution.
