“The overall sound is more harmonious in every respect – in dynamics, in transparency, in naturalness. The AC iPurifier seems to have a positive effect. The background vocalists are relaxed and in total you can hear pleasure again instead of an analytical search for missing sounds.”
http://www.highresmac.de/filter-turm-mit-indizes-ifi-audio-ac-ipurifier/
Translated with Google
Many thanks HighResMac for your review