Eclipse 3122

[bdgf2004]

Works great but has a constant humming sound. I've played with all the pots and switches but it won't stop.

 

[Perry Babin]

What are you using for a signal source?

Or is the humming with no signal source?

ACV across the speaker terminals?

Do all channels hum?

 

[bdgf2004]

You asked the right questions. I'm using a tablet via Bluetooth to a head unit. I have an app for playing sine waves and it was running in the background. The amp is fine. Thank you