FiiO FT1 Pro Open-Back Planar Magnetic Headphones (BLUE)

95x86mm FiiO- Developed Flat Unit: The FT1 Pro unit measures 95x86mm, a size comparable to flagship heavy-duty flat earphones, yet it weighs only about 374g. Leveraging the advantages of the in-house developed flat unit, the T1 Pro delivers an exceptionally wide lateral soundstage rarely seen in its class, with almost imperceptible boundaries, effortlessly unlocking a full frequency response up to 40kHz.
1μm Ultra-Thin Diaphragm: After two years of independent research and development, the FiiO FT1 Pro features a leading 1μm ultra-thin diaphragm, made from high-performance PET substrate. In the microscopic world, even a difference of 2μm versus 1μm in diaphragm thickness leads to significant performance variations under high-speed vibrations, directly affecting the final sound quality.
Sapphire + Aluminum Dual-Coating Patent Technology: The diaphragm uses a dual-coating of sapphire and aluminium to enhance frequency response across different bands, improving audio resolution an