Linsoul Kiwi Ears Quartet 2DD+2BA Hybrid Wired HiFi Earphones, Ergonomic Design, Re-cableable, 3.5mm Stereo Plug & 0.78mm 2-Pin Connector, Balanced

[About Kiwi Ears] At Kiwi Ears, our driving force is the pursuit of superior audio reproduction capabilities, perfectly combining technological innovation and excellent tuning strategies. In particular, to meet the demands of audiophiles and recording studio engineers, we uncompromisingly develop professional in-ear monitors to provide excellent musical immersion. Furthermore, our engineers do not use typical earphone development processes; instead, all drivers are handcrafted by our engineers. Users do not need to worry about driver quality issues, they simply enjoy a wonderful music experience. We are Kiwi Ears, bringing unprecedented music experiences to audiophiles. [Superior Bass Reproduction] The Kiwi Ears Quartet's bass driver features a new coaxial dual dynamic diaphragm design. This innovative driver design employs dual 10mm titanium diaphragm dynamic drivers, each driven by independent dual magnetic fluxes. The dual dynamic diaphragms are passive and phase-synchronized to prevent sound waves from canceling each other out. This new subwoofer design delivers a tighter, faster, deeper, and more extended sub-bass kick than any previous woofer design. Quartet is Kiwi Ear's answer for anyone looking for an enjoyable in-ear monitor, delivering all the quality bass they need. [Natural Sound] Kiwi Ears Quartet inherits Kiwi Ears' natural and balanced tuning characteristics. To meet the demands of professional musicians and audio engineers, Kiwi Ears Quartet's sound quality is like that of a recording studio ear monitor. Kiwi Ears Quartet uses a 3-way design, achieving complex layering and effectively reducing THD+N. Kiwi Ears Quartet's bass is limited to the sub-bass frequency range, with a peak of 8dB from 20Hz to 200Hz. From 200Hz to 800Hz, there's only 1dB of distortion. Treble now matches the perception of the human ear, with a 7dB peak at 2.5kHz and a gentle decay from 10kHz onwards. This precise process ensures every detail is reproduced. The sound tubes in these earphones are manufactured to international standards and are compatible with most earpieces. [Customized Balanced Armature Drivers] Quartet features a custom mid-high balanced armature driver and a custom ultra-high tweeter balanced armature driver. These drivers have been modified to match the balance of the new dynamic driver with a vent system tuned to provide more airflow. In keeping with Kiwi Ears tradition, the balanced armature is passively tuned to match our company's target curvature for the mid and high frequencies. This ensures that the midrange delivers crisp, clean tones without making vocals or instruments sound dull or nasal. The high frequencies are detailed and sparkling enough for professional performance, yet natural without harshness or fatigue. Below are brief explanations of some issues with Kiwi Ears Quartet headphones. If the headset pins are loose, use tweezers to slightly adjust the pins toward the center to make them more firmly seated and less likely to come loose. If there are any bubbles or other issues with the headset panels or other areas, please contact us. If any accessories are damaged, we will arrange for the original headset accessories to be sent immediately. If the headphone paddles are damaged or there are deviations in the sound, we will also arrange for a replacement product. At Kiwi Ears Quartet headphones, we strive every day to ensure our customers have a pleasant musical journey!