Flow 28 NCF Inline Power Filter

Inline Power Filter with Built-in EMI Filtering

In 2010, Furutech introduced its first Inline Power Filter - a compact and effective solution featuring integrated EMI filtering. Designed to be positioned between a power cable and the AC inlet of an audio component, it significantly reduced high-frequency noise and suppressed vibration transmitted through the power line. The result: cleaner, more stable power and a marked improvement in sonic clarity. 

In 2016, the flagship Flux-50 was upgraded with Furutech’s proprietary NCF (Nano Crystal² Formula) technology. The filter housing was enhanced with a vibration-damping composite, while the internal architecture incorporated the AC-1501(R) EMI-filtering system and Neo Damper material - together offering superior control over both electrical interference and mechanical resonance. 

By 2024, the Inline Filter Series had been further refined with upgraded internal coils and capacitors, enhancing its ability to suppress ground noise, voltage irregularities, and high-frequency interference. These advancements delivered even lower noise floors, greater dynamic range, and a more natural, immersive listening experience.

Now in 2025, Furutech proudly debuts the Flow-28 NCF - a high-performance, cost-effective evolution that benefits from the full legacy of technical innovation and refinement in the series. Featuring the FI-28 NCF IEC connector and incorporating all the proven advances in EMI suppression and vibration control, the Flow-28 NCF not only blocks external noise and vibration, but also prevents internally generated noise from contaminating the rest of the system or escaping into the surrounding environment. 

Drawing from over a decade of research and development, the Flow-28 NCF delivers clean, stable power with exceptional efficiency - offering audiophiles a compelling upgrade in performance and value. 

Advanced Noise Suppression with Furutech’s Nano Crystal² Formula (NCF) 
At the heart of the Flow-28 NCF is NCF (Nano Crystal² Formula), a proprietary material developed by Furutech. This cutting-edge technology features a crystalline compound with two active properties: 

• Generates negative ions to eliminate static.
• Converts thermal energy into far infrared to dissipate heat. Combined with nano-sized ceramic particles and carbon powder for their piezoelectric damping effect, NCF is the ultimate electrical and mechanical noise suppression solution—exclusive to Furutech products

Amazing Features:

• The body of the Flow-28 NCF combines two “active” materials: Nano-sized ceramic particles and powdered carbon plus Nylon and fiberglass to form an extremely effective mechanically and electrically damped body
• Use between power cables and power distributors or power cables and components
• Eliminates radiated AC noise
• Fitted with rhodium-plated α (Alpha) nonmagnetic FI-28 NCF(R) connector
• AC-1501(R) EMI-filtering IEC features rhodium-plated α (Alpha) nonmagnetic copper alloy conductors plus…
• A parallel circuit with an in-line coil and capacitor that reduces noise at 1MHz by 10dB and at 10MHz by more than 30dB
• Floating Field Damper™ (Earth/Ground Jumper System) with US Patent No.: 6,669,491
• Patent-pending metal cable clamp improves grip and reduces mechanically and electrically induced distortion
• α (Alpha) conductor shield for protection against radiated noise
• RoHS-compliant flexible PVC sheath improves vibration isolation
• Special high-grade PE Insulation contributes to reduced capacitance
• Incorporating Furutech’s special passive GC-303 EMI filtering material

The Furutech Floating Field Damper - Solving the Biggest Problem You Didn’t Know You Had
Noise and vibration are key contributors to signal transmission distortion, making their control essential for stable, low-loss AC power transfer. While many audiophiles and video enthusiasts assume that electrical disturbances originate when plugging a power cord into a wall receptacle—often evidenced by the small spark seen when a device is plugged in while On - research reveals that multiple elements within a connector can also generate stray electrical potentials. Components like cable clamps, screws, and other magnetic parts can all contribute to these disturbances, further impacting signal quality. 

The parallel circuit with in-line coil and capacitor reduces noise at 100 KHz by 8dB and at 500 KHz by 14dB and at 10MHz by more than 30dB

• Rhodium plated α (Alpha) nonmagnetic copper alloy conductors
• Outer cover - Ni-plated steel-plate
• Inner Box and cover - PBT (Poly Butylene Terephthalate)
• Rating: 125 VAC @ 15A / 250 VAC @ 10A 50/60Hz       

• α (Alpha) pure-copper rhodium-plated conductors.
• The insulation body of the connectors incorporates an “active” damping material: Nano Crystal² Formula - Nano Crystalline, Piezo Ceramic and Carbon Powder. Nano Crystal² Formula eliminates static, “interconverts” thermal, mechanical and electrical energy and damps vibrations - all for the finest Furutech Pure Transmission signal imaginable. 

• Conductors:  56-strand (Inner) and 29-strand (outer) α (Alpha) OCC  0.175mm x 3 cores
• Insulation - 1:  Irradiated PE (Red/Natural/Yellow) 3.45mm diameter
• Insulation - 2:  Irradiated PE surrounded by Teflon tape wrap, 3.6mm diameter
• Inner Sheath:  RoHS-compliant flexible PVC incorporating carbon particles
• Shield:  0.12mm diameter α (Alpha) Conductor wire braid
• Sheath:  RoHS-compliant flexible PVC, 14.2mm diameter
• Jacket:  Vibration-damping Nylon yarn braid (Black)