Looks like from the ad that they are looking for folks to test these out , hence the lower pricing and likely not much feedback to be forthcoming
All 845 owners
Has anyone seen, better yet, heard, the new Black Treasure 845-Z from Shuguang?
http://psvanetube.com/wordpress/store/products/treasure-845-z-select-pair/
http://psvanetube.com/wordpress/store/products/treasure-845-z-select-pair/