Since I thought they would be released at 300-400 USD, when they arrived I started comparing them to the best iems I've got on hand. Gotta say, they are certainly no slouch and I can't think of a single iem I own or have heard in the under 200 USD category that compares even remotely. Gotta aim much higher.
Even compared to iems like the HiFiMan RE800 and RE2000, Campfire Audio Polaris, and FLC 8S, the B400's accurate imaging, layering, and separation qualities stand out. None of them provide the same sense of space and depth of the B400 which is what makes this iem so special. It's ability to move sound around is amazing. Going from the B400 to the Polaris, which is no sound stage slouch, makes the Polaris sound flat in comparison. Wall of sound versus an open room. The effect isn't quite as pronounced with the FLC or HiFiMan bros.
While it's not the most vibrant and entertaining of the bunch, that goes to the Polaris, it's technical competence is unmatched in this group and completely addictive. Every time I listen to them I hear something new in familiar tracks, and it's, well, damn cool. Can't wait for these to get into the hands of people who've bought them, not just reviewers. Also might have to put my money where my mouth is and scrounge up the cash to buy a colored pair.