I am really interested in this thread. But then you post the Reference Tracks. All child's play, and nothing to test a DAC or attenuator at all! You need to try solo piano, Mahler/Bruckner, Choral/massed voices, small chamber ensemble etc etc.
Do you really hear any difference between the battery and DC adapter? This would be an interesting experiment for me.
What exactly did you change in order to use the battery? What kind of battery?
Here is a step by step guide for configuring Foobar for DSD playback: Configuring Foobar2000 for ASIO DSD / DXD Playback with exaSound DACs.
"Do you really hear any difference between the battery and DC adapter? This would be an interesting experiment for me.
What exactly did you change in order to use the battery? What kind of battery?"
exa065 has posted the part number CA 2185. You may wish to also use an in-line fuse on the hot lead. I do not, but I recommend members do so, to protect the e20 in case of an accidental short across the + and - leads of the battery.
I am not a power supply guru so while I will describe what I hear, I may not be able to provide the proper technical explanation. More knowledgeable members are welcome to contribute.
I found the 12 volt battery to reduce noise and subtle phase aberrations that I attribute to the stock wall-mount AC-DC switching power supply.
With the supplied power supply, there is a slight residual 'ringing artifact' that seems to come on, or after the trailing edge, of the music. The phase is subtly affected resulting in an inaccurate (shortened) natural instrument decay in space; spacial cues in the music and sound-stage are also slightly less holographic with less space/air; the beautiful harmonic structure/layering of the instruments and vocals are slightly masked.
My Optima Blue 12 volt battery corrects these subtle issues and cinched my decision to keep the e20 in my home.
For the record, I am currently using my Lumination loudspeakers (high efficiency, high quality single driver horn loudspeaker), and custom low power SE triode mono-block 2A3 amplifiers manufactured by Found Music.