I bought the QKZ VK1 based on your endorsement and the marketing materials (graphene, ~1 tesla magnet, Helmholtz resonating double cavity??, Red Dot product design award, other statements that may have no bearing at all on sound quality but sure sounds sweet) before I saw the comparison with the TRN V10. I'm optimistic that QKZ didn't simply rebrand the V10 but at the end of the day, who cares as long as you enjoy them, right? That being said, companies share reference designs all the time. This article shows what the environment looked like 8 years ago:
https://gizmodo.com/5617200/the-secret-scam-of-cheap-earbuds. Granted, much has changed since then. "Cheap earbuds" sound better than ever, far from the "scam" described in the article. Chinese companies like KZ and QKZ (I'm still not sure what their relationship is) have come into their own and consumers are demanding higher quality products at lower prices. This is all a long-winded response to support my unproven theory that the TRN V10 and QKZ VK1 may look similarly on the outside due to the same reference design but may actually have unique engineering on the inside. Now, repeating what was said before, who wants to be the guinea pig who buys both and breaks them down to compare their innards? For the greater good, of course
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