I didn't record a video of the before and after but I did extensively compared the A1000's audio with my A1200 by playing the same mod file and switching inputs on my amplifier to compare.
Before the mod, higher frequency notes weren't very crisp and almost sounded muffled. The difference is very noticeable with the mod and I love that the power LED goes dim, giving you visual confirmation that the mod works. It almost look like it was an implemented feature that they left out. Really pleased with the end result.