I like the 3-4 hour warm up. For generating RF. LOL.
There's an English phrase for those two. Dickheads, I believe.
You can hear changes it is quite a good recording for a YouTube video. It isn't due to that device, though, IMHO.
Going by how good SR products are that sound difference is probably because of the product. I have not seen the video and without listening to the product in a room, difficult to judge but with SR I am 'they work unless proven otherwise"