Headphone (1) is engineered for efficient sound delivery and vivid bass thanks to the custom-made 40 mm speaker and high-linearity suspension system with PU surround. The PU surround moves more effectively than traditional materials like PET, creating deeper, richer tones in the low frequencies. Its 8.9 mm width exceeds industry norms, minimizing distortion and keeping the driver stable to cast precise vibrations. For clear vocals, vibrant mids and an overall enveloping sound.