The Furutech NCF Clear Line-USB is a passive USB accessory designed to reduce noise and improve signal stability in digital audio systems. Simply inserted into an unused USB port, it works to manage EMI, vibration, and static through Furutech’s Nano Crystal² Formula (NCF) and resonance-controlled construction.

The design includes 24k gold-plated nonmagnetic USB connectors, a multilayer carbon fiber housing, damping materials, and a semi-sealed air chamber to help minimize unwanted interference. Furutech also incorporates specially treated capacitors and Alpha-processed metal parts for improved conductivity and consistency. The result is a cleaner, more focused presentation with improved clarity and overall balance in compatible audio systems.