MOONDROP Quarks In-Ear Earphones with Mic, Playback Frequency Band 4 - 43,000 Hz, 0.1 inch (3.5 mm) Connection, Clear Housing

As an entry-model earbuds, after 2 years of tuning, the Moondrop Quarks delivers powerful sound quality at this price point, It adopts an external magnetic circuit consisting of high performance neodymium magnets and high performance conductive components, providing excellent dynamics, low non-linear distortion, and powerful bass, The diaphragm is made of a high performance polymer material with both excellent toughness and compliance, combined with a special cavity structure to provide long lasting tuning sound, Two years of tuning, the Quarks performs incredibly well with fully enclosed earphones, HRTF (Head Transmission Function) compliant for natural and open sound fields