The 7Hz Eternal is a fun-sounding IEM carried by the strength of its bass performance. The toe-tapping physicality of the Eternal’s dynamic driver is frequently successful in distracting the listener from the less-than-ideal upper midrange and underwhelming detail retrieval. With that said, there are better options at this price point for critical listening.
My full review, with measurements, a comparison with the SeeAudio Bravery, and additional images, is available on my blog: