Description
Power quality can make or break a high-resolution system. Even when your components are excellent, the AC line often carries “storms” of unwanted interference: noise on the ground reference, RF hash from network gear and processors, and disturbances caused by appliances sharing the same utility transformer. These issues can show up as a subtle haze—less separation, flatter imaging, and reduced low-level detail. The Furutech Flow-C15 is engineered to address those real-world problems at the most practical point possible: in-line, between a power cable and a component (or between a power cable and a power distributor).
Inline filtration without current limitation
A common worry with filters is current compression: the fear that any filtering will “choke” an amplifier or reduce dynamics. Furutech specifically states that the Flow-C15 performs its filtering without restricting current draw and that it does not interfere with current draw, making it suitable not only for sources but also for components that demand fast transient current.
What it targets: ground noise, spikes/sags, and HF digital noise
Furutech describes Flow-C15 as protecting against distortion caused by:
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ground noise
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voltage spikes and sags
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high-frequency power supply noise from other components
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high-frequency digital noise emanating from processors and digital interconnects
In other words, it’s intended to be a “clean-up” device for the kind of contamination that’s hard to solve with cable changes alone—especially in apartments or shared-power environments.
Parallel circuit noise reduction (measured attenuation)
Flow-C15 uses a parallel circuit with an in-line coil and capacitor. Furutech provides specific attenuation figures:
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8 dB at 100 kHz
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14 dB at 500 kHz
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more than 30 dB at 10 MHz
These frequencies align with the types of high-frequency noise that can ride on AC lines and couple into sensitive audio circuits.
Designed for modern installs: slimline IEC C15
One of the most practical advantages of the Flow-C15 is physical: it uses a slimline IEC connector design, making it suitable for cramped rear-panel spaces where bulky filters and adapters don’t fit. Furutech specifically calls out its usefulness for 4K/8K TVs and low-profile audio/video components—exactly the gear that often has minimal clearance behind the unit.
“Pure Transmission” build: α-treated, 24k gold-plated conductors and damped body
Flow-C15 combines Furutech’s materials and treatment approach with a mechanically stable enclosure:
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The IEC output connector is a Furutech FI-C15 (G), using a body made from special nylon resin with vibration damping properties and gold-plated pure copper electrodes treated with Furutech’s α-process.
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The input side uses the AC-1501 (G) EMI-filtering IEC featuring 24k gold-plated α (Alpha) non-magnetic copper alloy conductors.
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The filter body combines “active” damping materials—nano-sized ceramic particles and powdered carbon, plus nylon and fiberglass—to create an enclosure that is both mechanically and electrically damped.
The concept is straightforward: stabilize the electrical path, reduce vibration influence, and minimize radiated noise so your system can resolve fine detail more naturally.
Where to use Flow-C15
Furutech recommends using it between power cables and power distributors or between power cables and components.
Typical best-practice placements include:
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On digital sources (streamers, servers, DACs) where RF noise is most obvious
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On TVs and AV gear with slim rear clearance
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On components sharing a noisy circuit where the system’s “background” needs calming
RATING
Rating: AC 125V 15A / AC 250V 10A 50/60Hz
FEATURES
AC Power Can Make or Break Your System!
The audio you hear from your home entertainment system is essentially the incoming electricity itself, and the typically violent storms riding the AC line, and its ground are very detrimental to the performance of your components.
The Flow-C15 Filter (G) is a superbly engineered and finished inline power filtering unit that eliminates many common problems caused by contaminated electrical power lines. It protects against distortion caused by ground noise, voltage spikes and sags, high frequency power supply noise from other components in your own system, and finally high-frequency digital noise emanating from processors and digital interconnects.
Plus, you’re never alone when you take your listening seat; the residential AC supply is shared with other apartments, homes, and businesses on the same utility transformer explaining why many enthusiasts find their systems perform to a higher standard late at night and over weekends.
And while the Flow-C15 Filter (G) is a star performer at eliminating common AC problems, it does it all without restricting current draw in any way. Furutech, known for its world-class Pure Transmission engineering, build and finish, have done the tests and the Flow-C15 Filter (G) does not interfere with current draw. The AC-1501 (G) EMI-filtering IEC input perfectly complements the remarkably effective Flow-C15’s ability to eliminate distortion. The IEC connector used is the Furutech audio grade FI-C15 (G). The body is made of a special nylon resin with vibration damping properties. The electrodes are made of gold-plated pure copper with excellent conductive properties and treated with Furutech’s α-process.
The Flow-C15 Inline AC Filter lowers noise on every component on which it’s used resulting in very natural and extremely fine resolution down and through the utterly silent noise floor. It improves sound staging and imaging while creating nuanced high frequencies, an attractive, engaging midrange, tight and controlled bass, with power and dynamics to spare.
The Flow-C15 Filter (G) with its slimline IEC connector design is perfect for 4K / 8K TVs and low-profile audio & video components.
The AC-1501 (G) EMI Filtering IEC Input
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
SPECIFICATIONS
• The body of the Flow-C15 Filter (G) 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 24k gold-plated α (Alpha) nonmagnetic FI-C15 (G) connector
• AC-1501 (G) EMI-filtering IEC features 24k gold-plated α (Alpha) nonmagnetic copper alloy conductors.
• 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
• 24k gold-plated α (Alpha) nonmagnetic copper alloy conductors
• Outer cover • Ni-plated steel-plate
• Inner Box and cover • PBT (Poly Butylene Terephthalate)
• Rating: AC 125V 15A / AC 250V 10A 50/60Hz
Cable Specifications
• Conductors • 37-strand Silver Plated α (Alpha) μ-OFC 0.25mm x 2 cores
and 37-strand α (Alpha) μ-OFC 0.25mm x 1 cores
• Insulation• High-density P.E. (Red, White, Green) 3.43mm diameter
• Inner Sheath • RoHS-compliant flexible PVC incorporating carbon particles
• Shield • 0.12mm diameter α (Alpha) Conductor wire braid
• Sheath • RoHS-compliant flexible PVC, 12.9mm diameter approx.
The Flow-C15 complies with IEC standards and features the EMI filter AC-1501 G (UL E134751 /
CSA Certificate Number: 1224486) and the IEC connector FI-C15 (G) (PSE Certificate Number: JET7873-43004-1001 / KEMA-KEUR Certificate Number: 35-104104 REV.1), both of which meet IEC regulations.
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