FiiO LL-RC 2025

Headphone upgrade cable
High-quality conductors: With over 6N OCC copper and imported monocrystalline copper from Furukawa for superb signal integrity.
Cryogenic treatment with liquid nitrogen: The core conductors are treated around the clock at -192 °C to reduce internal stresses and improve conductivity.
21 AWG coaxial twisted structure: Inner conductor (positive) with 6N OCC, outer conductor (negative) with Furukawa copper; a total of 176 strands in 4 conductors.
Single-crystal welding: Ensures smooth signal flow and minimizes interference from grain boundary resistance.
High-quality insulation and shielding: Uses PFA with a low dielectric constant (2.1), which improves tonal richness and dampens resonance.
Silver-containing lead-free solder: Improves high-frequency transmission and signal purity.
Interchangeable plugs: With 3.5 mm single-ended and 4.4 mm balanced carbon fiber plugs for flexible compatibility.
Hi-fi quality: Y-splitter and plug housing made of aluminum alloy + carbon fiber, matching the FIIO FT7 standard cable design.

The FIIO LL-RC 2025 headphone upgrade cable brings professional sophistication to audiophile listening.
Featuring liquid nitrogen-treated 6N OCC and Furukawa monocrystalline copper, this cable ensures smooth, unadulterated sound transmission with breathtaking clarity and purity.
Each conductor is coaxially twisted, which improves signal balance, EMI resistance, and high-frequency response.
Unlike conventional cables, the LL-RC 2025's unidirectional weld seam follows the natural flow of electrons, ensuring improved sound consistency.
A thick, low-resistance 21-AWG geometry maximizes detail and dynamics. Inside, a PFA insulation layer with exceptional damping properties subtly improves midrange warmth and vocal fullness while minimizing interference.
Designed for professional use, the LL-RC 2025 features interchangeable carbon fiber plugs (3.5 mm and 4.4 mm) in a precision aluminum housing, ensuring compatibility with a wide range of high-end devices, from DAPs to full-size amplifiers.

Specifications:
Conductor materials: Liquid nitrogen-treated 6N OCC + monocrystalline copper from Furukawa
Treatment process: Cryogenically treated for 7 days at -192 °C
Structure: Coaxially twisted with unidirectional crystal welding
Core composition: 176 strands in total (positive: 38 × 0.1 mm, negative: 40 × 0.08 mm + 10 × 0.1 mm)
AWG rating: 21 AWG per conductor
Insulation: PFA dielectric (dielectric constant ≈ 2.1)
Cable length: approx. 1.5 meters
Headphone connection: two 3.5 mm TS plugs
Audio plug: interchangeable between 3.5 mm SE and 4.4 mm symmetrical (carbon fiber housing)
Outer jacket: black TPU jacket

What`s in the box:
FIIO LL-RC 2025 Headphone cable ×1
4.4 mm interchangeable symmetrical plug (pre-installed) ×1
3.5 mm interchangeable single-ended plug ×1
Stecker: 3,5mm, 4,4mm