Furutech NCF Clear Line Signal & Power Optimizer

Available at Vinyl Sound, Toronto's hi-fi specialist in Richmond Hill, ON, the Furutech NCF Clear Line is a family of passive audio-grade optimizers that bring Furutech's proprietary Nano Crystal² Formula (NCF) technology to every connection type in your system — AC power, RCA, XLR, USB, and LAN. No active circuitry, no power supply required: simply plug each optimizer into a vacant socket or unused port and immediately experience improvements in soundstage depth, focus, tonal balance, harmonic clarity, and low-frequency definition.

What is Furutech NCF technology?

NCF — Nano Crystal² Formula — is a proprietary material developed exclusively by Furutech. It combines a special crystalline material with nano-sized ceramic particles and carbon powder, producing two distinct effects simultaneously: it generates negative ions that eliminate static charge, and it converts thermal energy into far infrared — making it the ultimate passive electrical and mechanical damping material. All metal parts across the Clear Line range also receive Furutech's two-stage Alpha cryogenic and demagnetization treatment, rendering conductors stress-free, stable, and maximally conductive.

Choose the right NCF Clear Line variant for your system

NCF Clear Line AC Power Optimizer

Plug into any vacant receptacle on your power distributor or wall outlet — on the same AC line as your system. Alpha OCC rhodium-plated copper coils (passive air coils) inside a 4-layer NCF carbon fibre hybrid housing work silently to reduce the noise floor of your entire system. Includes a pressure-sealed internal air chamber for additional damping. Dimensions: approx. 88.4 × 39.5 mm. Weight: 69 g. Burn-in: 24 hrs recommended.

NCF Clear Line Hybrid Damping Rings for NCF Booster (20 pcs/set)

A set of 20 NCF-material hybrid damping rings designed to augment the performance of the Furutech NCF Booster. The rings increase the contact surface area of the NCF material for enhanced anti-resonance and static elimination around connector bodies.

NCF Clear Line RCA Input/Output Optimizer

Fits any vacant RCA socket on your amplifier, preamplifier, DAC, or source component. The one-piece Alpha OCC rhodium-plated conductor pin is injected with NCF liquid crystal polymer resin. An audio-grade ceramic capacitor with silver-coated damping treatment eliminates noise at the output terminals. NCF body and shell secured with anti-shock stainless steel screws torqued to the optimal value at the factory.

NCF Clear Line XLR Male Input Optimizer

Inserts into any unused XLR female (input) socket. The rhodium-plated Alpha OCC one-piece conductor pins are injected with NCF material for anti-static and piezoelectric damping. Features the same NCF liquid crystal polymer body, audio-grade ceramic capacitor, and pressure-sealed air chamber as the RCA variant.

NCF Clear Line XLR Female Output Optimizer

Caps unused XLR male (output) connectors on balanced equipment. Shares the NCF body construction, rhodium-plated contacts, ceramic capacitor, and Alpha-treated metal parts of the XLR Male variant — providing symmetrical protection across all balanced connections in your system.

NCF Clear Line USB Optimizer

Plugs into any vacant USB-A port on a streamer, DAC, or computer audio source. Brings Furutech's NCF damping and Alpha-treated conductors to the digital domain — reducing noise and jitter-inducing interference on USB signal lines.

NCF Clear Line LAN Optimizer

Inserts into an unused RJ45 Ethernet port on your network switch, streamer, or router. Applies NCF anti-resonance damping to the network signal path — particularly beneficial in systems using network audio streaming or Roon.

Shared technology across all NCF Clear Line variants

• Furutech Nano Crystal² Formula (NCF) body — nylon, fibreglass, nano ceramic particles, carbon powder
• Alpha (α) cryogenic and demagnetization treatment on all metal parts
• Audio-grade passive ceramic capacitor with silver-coated damping (signal variants)
• Pressure-sealed internal air chamber for additional resonance damping
• NCF end cover with moulded channels — 76% greater NCF surface area for enhanced effectiveness
• Anti-shock stainless steel screws, factory-set to optimum torque
• No active circuitry — passive design, zero power consumption
• Recommended burn-in: 24 hours

Frequently asked questions

What does the Furutech NCF Clear Line actually do to improve sound?
The NCF Clear Line works passively through two mechanisms. First, the NCF material generates negative ions that neutralise static charge built up at connection points — static is a known source of noise and signal degradation in audio systems. Second, the NCF material and ceramic particles provide mechanical damping, reducing micro-vibrations that modulate the signal. The result is a lower noise floor, improved soundstage focus, and cleaner bass definition — without any active circuitry or power consumption.

How do I use the NCF Clear Line AC Power Optimizer?
Simply plug it into any vacant socket on your power bar or wall outlet — ideally on the same AC circuit as your hi-fi system. No setup, no configuration. Furutech recommends a burn-in period of 24 hours for optimal performance. For best results, use more than one unit across multiple vacant sockets.

Which NCF Clear Line variant should I start with?
The AC Power Optimizer is the most universal starting point — it conditions the power supply shared by your entire system. From there, the RCA or XLR optimizers on unused inputs of your preamplifier or integrated amplifier typically yield the next most noticeable improvement. USB and LAN optimizers are most effective in streaming-centric or computer audio systems.

Can I use multiple NCF Clear Line optimizers at the same time?
Yes — and Furutech recommends it. The NCF Clear Line is designed to be used in multiples across your system. Using AC, RCA, XLR, USB, and LAN optimizers simultaneously produces a cumulative benefit, as each unit addresses noise and resonance at a different point in the signal or power chain.

What is Furutech's Alpha treatment and why does it matter?
Alpha is Furutech's proprietary two-stage process that subjects all metal parts to deep cryogenic treatment followed by demagnetization. Cryogenic treatment relieves stress in the metal's crystal structure, improving electron flow and conductivity. Demagnetization removes residual magnetism that can colour the signal. Together, these treatments improve every facet of audio performance — and are applied to all conductors and metal components across the NCF Clear Line range.

Does the NCF Clear Line USB Optimizer work with any USB port?
The NCF Clear Line USB Optimizer fits standard USB-A ports. It is designed for use with streamers, DACs, and computer audio sources that have a vacant USB-A socket — not for use in active data transfer ports currently in use by a device.

Is the NCF Clear Line LAN Optimizer compatible with any network switch or router?
Yes. It fits any standard RJ45 Ethernet port. It is most effective when installed in a vacant port on the switch or router on the same network segment as your streamer or network audio player — bringing NCF damping directly to the digital network path feeding your system.

Where can I buy the Furutech NCF Clear Line in Toronto, Canada?
The full Furutech NCF Clear Line range is available at Vinyl Sound, Toronto's hi-fi specialist in Richmond Hill, ON. Shop all variants online at vinylsound.ca or visit us in-store — we ship across Canada.