Hi ! my E9 is cutting out after about half volume the led turns red and it makes a "pop" sound
Just bought the flacs from hdtracks.com and then this just suddenly started happening
My E9 used to have this exact problem. Turned out to be a power supply issue: my cord was kinked near the base where it goes into the transformer that plugs into the wall.
I straightened it out and I can now crank the volume all the way up again.