The RevoNext QT3s are a strange product. They float around on online retail sites in a sea of earphones from companies most people will never have heard of, but they offer hardware usually only seen in pairs many times the price.

For example, Shure’s quad-driver SE846 earphones cost £869, while RevoNext offers the same headline features for £50. That almost sounds too good to be true – and, inevitably, it is.
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https://www.whathifi.com/reviews/revonext-qt3