FI-50M NCF(R)

• α (Alpha) Pure-Copper Rhodium-plated Conductor
• Earth (Ground) Jumper System (US Patent No.: 6,669,491/European:EP1445837)
• Nylon/fiberglass body with a special anti-resonance nano-sized crystalline, piezo ceramic particles and carbon damping material
• Multilayered nonmagnetic stainless steel and silver plated carbon fiber housing incorporating an acetal copolymer. The best of damping and insulation materials improve frequency extension and tonal balance
• Specified for cable diameters from 6mm to 20mm
• Dimensions:
FI-50M NCF Body length 40mm x 34.5mm diameter / 76.2mm overall length
• Metal cable clamp improves grip and reduces mechanically and electrically induced distortion

Note* Please note that slight discoloration of the silver-plated carbon fiber may occur over time. This is partly due to the nature of the product being hand-produced rather than mass-manufactured. Such variations are normal and do not affect the quality or performance of the product.

Technical Information Notice

Furutech FI-50 NCF / FI-50 / FI-52 NCF / FI-52 / FI-48 / FI-46 Series Connectors Regarding Housing Continuity Measurements Furutech would like to provide the following technical clarification regarding continuity measurements between various external housing sections of certain Furutech connectors. The primary earth/ground path of Furutech connectors is achieved through the actual ground conductor and grounding pin structure itself. Continuity between external housing sections is not a guaranteed specification parameter and may vary depending on product design, construction methods, and normal manufacturing tolerances. In particular, products incorporating carbon fiber elements, layered housing structures, bonded assemblies, or vibration-control materials may exhibit differences in measurable continuity between various external metal components. These variations do not affect:

• Grounding performance
• Electrical safety
• Product reliability
• Intended audio performance

Many Furutech flagship connectors incorporate the patented Floating Field Damper™ (Earth/Ground Jumper System), protected under US Patent No. 6,669,491 and European Patent EP1445837. This sophisticated system is specifically engineered to reduce distortion and noise caused by floating magnetic fields generated within metallic connector components during current flow. The mechanism works by carefully grounding key internal metallic components through a precision-engineered conductive bridge structure, thereby stabilizing electrical potential and improving overall power and signal transfer performance.  

Does My Connector Have the Floating Field Damper™?

Video Reference: https://www.youtube.com/watch?v=2HmvNJhM5UE Open your connector and check for the Furutech Floating Field Damper™ structure. The conductivity relationship between the body, housing fixing screws, and ground pole is explained as follows: Check for the small copper tabs located near the screw holes (highlighted in yellow in the reference image). In version “B”, the Floating Field Damper bridge can be seen through the clear plastic cover. In version “A”, only the small copper tabs are visible within the screw holes. Current flowing through a cable and its connector creates magnetic and electrostatic fields that continuously build and collapse during operation. These fields can induce electrical potential within small metallic parts such as fixing screws and connector hardware. The resulting floating magnetic fields can interfere with the main signal or power transfer path, introducing noise and distortion. The Furutech Floating Field Damper™ system addresses this issue by carefully grounding these floating metallic elements through a precision-engineered conductive bridge structure, significantly reducing distortion and contributing to cleaner and more stable power transfer. Because the external housing itself is not the primary earth path, measurable continuity between certain housing sections may or may not be present depending on model design, assembly methods, and normal production tolerances. If your connector incorporates the Floating Field Damper™ structure, you can rest assured that the product is operating as intended and represents one of the most sophisticated audio-grade connector designs available today.

Reference Overview