For those that don't want to wade through threads at forums here are some YT examples using the ADK A6. I think the first one sounds fine but notice some lowend rumble that could be remedied with either changing the mic placement or a HP filter. notice no fx or eq in the vid
This one the Vox are the A6 and the guitar is a CAD GX1 2400 at the neck
2 A6's into a Zoom H4 recording acoustic
Sales pitch
and the YT page with these and other vids, including some humorous almost silly parodies.
https://www.youtube.com/results?search_query=ADK+A6
Finally a interesting clip comparison of various gear, pretty straightforward, pic a category wait a bit up come manufacturers and models and various sources are available to choose. With the YT factor in compression and set the quality as high as possible and good speakers/monitors suggested or even good cans. Same applies to the Clipalator.
http://www.zenproaudio.com/clipalator.aspx
some mics that have been discussed are listed,like the AT-2020
ADK A6, Cad e70's and Cad M179 and Octava MK-012 (most expensive of the lot) and a SDC. I hope this helps at least a little bit