“Pro iESL boasts contents that can be said to be the definite version of such a capacitor type headphone adapter. It is an item where you can enjoy the depths unique to condenser-type headphones.”
http://www.phileweb.com/review/article/201707/17/2641.html
Many thanks Phileweb and iFi Japan (Top Wing Corporation) for your excellent review.
Translated with Google
