Sivga Nightingale Planar Diaphragm In-Ear Headphones (Open Box) noise-isolating Output impedance @ 1 kHz:

Output impedance @ 1 kHz: balanced 213 Ohm

as well as the open-back design achieves an airy and realistic soundstage perfect for audio engineering needs

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Physical wired connection capability

and other positive attributes – allowing the driver to deliver a robust

Sivga Nightingale Planar Diaphragm In-Ear Headphones (Open Box) noise-isolating Output impedance @ 1 kHz:The design is in the shape of a water droplet The water droplet shaped design features a front metal housing and a carefully crafted solid wood faceplate, with a delicate and elegant surface. Pleasant listening Moderate bass, rich mids, and delicate, but not harsh treble Classic design With CNC machined housing and solid wood faceplate, giving it an elegant and high end appearance. In Housing Developed Planar Driver Dual magnetic driver There is a