Here are the new clips I promised. These were recorded tonight. The center pin is reversed versus the initial clips (meaning barrel is +, center pin is - except of course for the stock wall wart). These aren't normalized and the recording gain was never touched/changed, (and gain wasn't touched in the previous samples either). I'm unclear why some have mentioned changing the gain since the same cart/record/phono stage were used in my case I didn't need to. The battery was fully charged and was checked tonight showing 12.74-12.75v. No eq or tone controls are involved.
I am using balanced cables out of my tape out on the preamp into a RME Babyface USB, yes I know a stupid name but a very good prosumer recording device. RME is know for their converters and the rock solid stability of their drivers. I'm running a quad core laptop. I have worked conscientiously to maintain the integrity of the files.
These are the four different psu and the batt options I provided before in random order.
#1
https://www.dropbox.com/s/0xcz8dbq4dmj93d/1_2nd.wav
#2
https://www.dropbox.com/s/2sew395zuxfm4lh/2_2nd.wav
#3
https://www.dropbox.com/s/6crmgbxrt8eu8vf/3_2nd.wav
#4
https://www.dropbox.com/s/x7e1zmg1e6ijo8t/4_2nd.wav
#5
https://www.dropbox.com/s/amirrljay8o0i4s/5_2nd.wav
It sounds like from the conversation that the Art has a decent power conversion system and thus the uncertainty shown by many in their preferences from the other clips no matter which psu or battery is used. I'll catch up on the conversation tomorrow morning.