Quote:
Originally Posted by
songforyou 
Also, I've read that many have experienced a static type noise when adjusting the volume with music playing.
That isnt restricted to the E9, and I have a simple fix. From the day you get your amp, make every effort to ensure that you dont get any dirt in the volume pot. My D4 was clean for a long time, but as soon as I started throwing it in my backpack I started having the symptoms you describe. The P4, straight from the factory, is the clearest portable I have heard (admittedly not a large sample, and all from iBasso), but I know that my slovenly ways put that at risk. Given that neither the D4 nor the P4 puts out much heat, I would even consider wrapping them in a plastic sleeve - clearly not a good idea with a mains-powered amp.
When we first bought computers, many of us took the time to place a sheet over the system when powered down - unfortunately, its not a habit I have carried into audio.
