Nicholas Ripley has posted a review of the JSA Type 2 passive headphone conditioner (£330) at Hi-Fi+. His conclusions:
“The best thing I can say about the JSA is it made me more of a headphone listener. I remain huffily old-school in my audiophile aspirations, and think of headphones as a modern necessity than a go-to place for my music. After spending some time with the JSA Type 2, I’m more into the whole headphone experience. The JSA is that good!”
You can read the full review here.