The highly anticipated successor to the Tin Audio T3 IEM has arrived. Retaining much of what made the T3 loved by listeners here on Drop, the new Tin HiFi T4 adds several features to improve sound, comfort, and durability. Among these are ultra-compact 10-millimeter carbon nanotube (CNT) dynamic drivers, which deliver high-resolution sound across the T4’s 10–20kHz frequency range. These drivers also contribute to the T4’s exceptionally low total harmonic distortion: only 1% at 1kHz. On the outside, the T4 showcases elements from automotive and aviation design to ensure comfort and deliver up to 32dB of noise isolation. It also gets an upgraded silver-plated copper cable for improved durability and signal transmission.