Fiio
FIIO LL-RC 2025 Liquid Nitrogen Headphone Upgrade Cable
FIIO LL-RC 2025 Liquid Nitrogen Headphone Upgrade Cable
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Specification
Specification
FIIO LL-RC 2025 Headphone Upgrade Cable — Liquid Nitrogen-Treated Monocrystalline Copper, 1.5m, 4.4mm/3.5mm Replaceable Plugs
Key Features:
- Premium Conductors: Features over 6N OCC copper and imported Furukawa monocrystalline copper for superior signal integrity.
- Liquid Nitrogen Cryogenic Treatment: Core wires are treated at -192°C for 24/7 to relieve internal stress and improve conductivity.
- 21AWG Coaxial Twisted Structure: Inner core (positive) with 6N OCC, outer core (negative) with Furukawa copper; 176 total strands across 4 cores.
- Single-Direction Crystal Welding: Ensures consistent signal flow and minimizes interference from grain boundary resistance.
- High-End Insulation & Shielding: Uses PFA with low dielectric constant (2.1), enhancing vocal fullness and damping resonances.
- Silver-Infused Lead-Free Soldering: Enhances high-frequency transmission and signal purity.
- Interchangeable Plugs: Comes with both 3.5mm single-ended and 4.4mm balanced carbon fiber plugs for flexible compatibility.
- HiFi-Grade Build Quality: Aluminum alloy + carbon fiber Y-split and plug shells, matching FIIO FT7 standard cable design.
Technology and Innovations:
The FIIO LL-RC 2025 headphone upgrade cable brings professional-grade refinement to audiophile listening. Using liquid nitrogen-treated 6N OCC and Furukawa monocrystalline copper, this cable ensures smooth, uncolored sound transmission with stunning clarity and tonal purity. Each conductor undergoes a coaxial twisted design that enhances signal balance, EMI resistance, and high-frequency extension.
Unlike conventional cables, the LL-RC 2025’s single-direction grain-aligned welding follows the natural flow of electrons for improved sonic consistency. A thick, low-resistance 21AWG geometry maximizes detail and dynamics. Inside, a PFA insulation layer with exceptional damping characteristics subtly enhances midrange warmth and vocal fullness, while minimizing interference.
Designed to match professional demands, the LL-RC 2025 includes interchangeable carbon-fiber plugs (3.5mm & 4.4mm), housed in precision aluminum, delivering compatibility across a wide range of high-end gear — from DAPs to full-size amps.
Technical Specifications:
| Parameter | Details |
|---|---|
| Conductor Materials | Liquid nitrogen-treated 6N OCC + Furukawa monocrystalline copper |
| Treatment Process | -192°C cryogenic treatment for 7 days |
| Structure | Coaxial twisted with single-direction crystal welding |
| Core Composition | 176 strands total (positive: 38×0.1mm, negative: 40×0.08mm + 10×0.1mm) |
| AWG Rating | 21AWG per conductor |
| Insulation | PFA dielectric (dielectric constant ≈ 2.1) |
| Cable Length | Approx. 1.5 meters |
| Earphone Termination | Dual 3.5mm TS male |
| Audio Plug | Interchangeable 3.5mm SE and 4.4mm Balanced (carbon fiber barrel) |
| Outer Sheath | TPU black jacket |
Package Includes:
- FIIO LL-RC 2025 Headphone Cable ×1
- 4.4mm Balanced Interchangeable Plug (pre-installed) ×1
- 3.5mm Single-Ended Interchangeable Plug ×1
- Eco-friendly Product Card ×1
What's in the Box?
What's in the Box?
Shipping & Returns
Shipping & Returns
- Free Standard full searchable Shipping
- DDP(Delivered Duty Paid) Services, No payment on receiption
- Free 7-Day Return Policy!
Shipping Fees
Worldwide Free Shipping on Hificat, Please allow 1-3 business days for conduct Quality Control in order to ensure the products quality.
In the event that a shipment is refused delivery by the recipient, is undeliverable, or is returned to sender, Hificat will process a refund to the original payment method used.
If a customer would like the order reshipped, they’ll be charged a reshipment fee. Customers may also be subject to a restocking fee of up to 20 percent of the product cost.
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Which Couriers To Use?
We collaborate with these courier companies:
Standard Shipping: Yanwen Express
Express Shipping(over $500 can be free): DHL Express, FedEx and SF Express
Hificat has extensive global logistics experience to ensure quality logistics services to consumers.
HiFiCat offers consumers different shipping, depending on the country, a choice of different shipping methods.
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Estimated Delivery Time
1. France, Germany, UK, Italy, Spain, USA.
All taxes and duties are prepaid to the carrier by HiFiCat prior to shipping, so there are no taxes or duties to pay when you receive it. 6-10 days to arrive.
Tracking Example
France: https://t.17track.net/en#nums=YT2132021222003141
Germany: https://t.17track.net/en#nums=YT2133621222016083
United Kingdom: https://www.17track.net/?nums=GV779664269GB
Italy:https://t.17track.net/en#nums=YT2133021222011717
Spain:https://t.17track.net/en#nums=YT2129521222003430
United States:https://t.17track.net/en#nums=SUA211205BIUQ1000007
2.EU Country：Filand, Poland, Estonia, Norway, Switzerland, Greece, Sweden, Israel, Czech Republic, Slovenia, Slovakia, Denmark, Netherlands, Latvia, Croatia, Austria, Hungary, Belgium, Bulgaria, Romania, Ireland, Malta, Iceland, Serbia and so on.
All taxes and duties are prepaid to the carrier by HiFiCat prior to shipping, so there are no taxes or duties to pay when you receive it. 10-15 days to arrive.
Filand: https://www.17track.net/?nums=UG324191515YP
Poland: https://www.17track.net/?nums=UG335827360YP
Estonia: https://www.17track.net/?nums=UG363043181YP
Norway: https://www.17track.net/?nums=VR457380806YP
Switzerland: https://www.17track.net/?nums=UG359525911YP
Greece: https://www.17track.net/?nums=UG250851788YP
Sweden: https://www.17track.net/?nums=UG353458343YP
Israel: https://www.17track.net/?nums=UG356134837YP
Czech Republic: https://www.17track.net/?nums=UG320437102YP
Slovenia: https://www.17track.net/?nums=UG349882511YP
Slovakia: https://www.17track.net/?nums=UG349946557YP
Denmark: https://www.17track.net/?nums=UG272480001YP
Netherlands: https://www.17track.net/?nums=UG206078468YP
Latvia: https://www.17track.net/?nums=UG336264373YP
Croatia: https://www.17track.net/?nums=UG331204789YP
Austria: https://www.17track.net/?nums=UG322443180YP
Hungary: https://www.17track.net/?nums=UG313846849YP
Belgium: https://www.17track.net/?nums=UG313858025YP
Bulgaria: https://www.17track.net/?nums=UG309182635YP
Romania: https://www.17track.net/?nums=UG295530616YP
Ireland: https://www.17track.net/?nums=UG286654665YP
Malta:
Iceland: https://www.17track.net/?nums=VR447888050YP
Serbia: https://www.17track.net/?nums=VR447710777YP
Ukraine: https://www.17track.net/?nums=UG331240667YP
Russian Federation: https://www.17track.net/?nums=VR454415418YP
3.South America:Peru, Brazil, Chile
Chile: https://www.17track.net/?nums=UG205949999YP
Brazil: https://www.17track.net/?nums=UG207476109YP
New Zealand: https://www.17track.net/?nums=YE175499582CN
Australia: https://www.17track.net/?nums=UG245685796YP
5.Canada By Canada Post, about 2 weeks.
Vietnam: https://www.17track.net/?nums=VR456508418YP
