6N single crystal copper OCC solid bare wire in ultra fine diameters
6N single crystal copper OCC wire built into HiFi headphone cable
6N solid OCC wire used for fine coil winding and signal wiring
6N single crystal copper OCC solid bare wire in ultra fine diameters
6N single crystal copper OCC wire built into HiFi headphone cable
6N solid OCC wire used for fine coil winding and signal wiring

6N Single Crystal Copper Wire (OCC) — Solid Bare Wire

6N · 99.9999% Pure · Solid Bare 6N Single Crystal Copper Wire (OCC) — Solid Bare Wire...
Vendor: RapidKeen
Availability: In stock
Product type: Pure Copper
$45.00
$45.00
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Subtotal: $45.00
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6N single crystal copper OCC wire built into HiFi headphone cable

6N Single Crystal Copper Wire (OCC) — Solid Bare Wire

$45.00
6N single crystal copper OCC solid bare wire in ultra fine diameters
6N single crystal copper OCC wire built into HiFi headphone cable
6N solid OCC wire used for fine coil winding and signal wiring

6N Single Crystal Copper Wire (OCC) — Solid Bare Wire

$45.00
Outer Diameter: 0.01 mm
Length: 1 meter
Description
Description
x
6N · 99.9999% Pure · Solid Bare

6N Single Crystal Copper Wire (OCC) — Solid Bare Wire

Ultra-fine single-crystal copper wire made by Ohno Continuous Casting, in a long continuous crystal structure for HiFi audio cables, headphone wiring, and fine winding.

The Single-Crystal (OCC) Advantage

Ordinary drawn copper is made of many small crystals, and the boundaries between those crystals interrupt the path along which signal and current travel. 6N single crystal copper wire (OCC) — also called mono-crystal copper wire, solid OCC wire, OCC copper wire, or single-crystal bare copper wire — is produced by Ohno Continuous Casting, which forms a long, continuous crystal structure with far fewer grain boundaries along the length of the conductor. The result is a smooth, high-purity signal path favored in HiFi and audio applications where detail and clarity matter.

This wire is a 6N, 99.9999% pure single solid strand, supplied bare and uncoated in the ultra-fine diameter range. It is the conductor used for headphone and earphone cables, HiFi interconnects and internal wiring, fine signal and coil winding, instrument and probe work, and precision hobby and experimental builds across the United States.

What Is 6N OCC Wire?

OCC stands for Ohno Continuous Casting, a process that casts copper into a long, continuous single-crystal structure rather than drawing it from ordinary polycrystalline stock. 6N indicates a purity of 99.9999%, supported by the purity documentation for this material. In this product the OCC conductor is drawn to an ultra-fine, single-strand, bare (uninsulated) wire that remains soft and easy to wind, twist, and solder. US buyers search this material as “OCC wire,” “single crystal copper wire,” “mono-crystal copper wire,” “6N OCC wire,” “solid OCC wire,” “HiFi OCC wire,” and “OCC headphone wire.”

Diameter Sizes and Approximate AWG

This ultra-fine OCC wire is ordered by millimeter diameter, with the closest American Wire Gauge shown as a guide. Each variant is one solid bare strand.

0.01mm (38 AWG) 0.02mm (32 AWG) 0.03mm (29 AWG) 0.04mm (26 AWG) 0.05mm (24 AWG)
Diameter variant Approx. AWG Typical use
0.01mm (38 AWG) ≈38 AWG Finest signal wire, delicate winding, micro connections
0.02mm (32 AWG) ≈32 AWG Fine headphone strands, tiny coils and links
0.03mm (29 AWG) ≈29 AWG Ultra-fine audio conductors, small signal paths
0.04mm (26 AWG) ≈26 AWG Headphone and earphone cable conductors
0.05mm (24 AWG) ≈24 AWG HiFi internal wiring, fine winding and probes

AWG values are approximate because American Wire Gauge sizes do not convert to exact round millimeter values. The complete OCC range is in the single crystal copper wire collection.

Key Properties of 6N Solid OCC Wire

6N, 99.9999% Pure

High-purity single-crystal copper, supplied with purity documentation, for a clean and detailed signal path.

Long Continuous Crystal

Ohno Continuous Casting creates a long crystal structure with far fewer grain boundaries along the conductor.

Single Solid Strand

One continuous bare strand that winds, twists, and terminates cleanly in fine audio and winding work.

Bare & Uncoated

No enamel or insulation; the full surface conducts, and the wire solders quickly without stripping.

Why Choose OCC for HiFi Audio

  • Fewer grain boundaries — the continuous crystal structure gives the signal a smoother path than ordinary drawn copper.
  • High 6N purity — 99.9999% pure copper supports a clean, detailed audio signal.
  • Headphone and earphone cables — ultra-fine solid OCC strands are a popular choice for custom and upgraded cables.
  • Internal HiFi wiring — used inside components, earcups, and small audio assemblies for short signal runs.
  • Fine winding — solid bare OCC suits delicate coils, probes, and experimental windings.
  • Easy to work — soft single-crystal wire forms and solders cleanly with fine tools.

How to Order 6N OCC Wire

1. Choose diameter

Select the millimeter variant, using the approximate AWG as a guide; finer sizes suit multi-strand cables and tiny windings.

2. Choose length or spool

Order the continuous length or spool quantity needed. Cable builders often combine several fine OCC strands per conductor.

3. Note bare vs insulated

This is bare wire with no coating; add your own insulation or sleeving when building cables and harnesses.

Common Applications

HiFi interconnects Headphone cables Earphone / IEM cables Internal audio wiring Signal wire Fine coil winding Small inductors Probes & instruments DIY audio builds Experimental electronics
  • HiFi & audiophile
    Interconnects, internal wiring, and signal conductors for custom audio equipment.
  • Headphones & earphones
    Fine OCC strands for replacement and upgraded headphone and IEM cables.
  • Fine winding & instruments
    Delicate coils, probes, sensors, and laboratory and experimental windings.

Bare Wire vs Enameled Wire

  • Bare OCC wire (this product) has no coating, so the entire surface conducts and solders; it is used for exposed signal paths, cable building with separate insulation, and fine connections.
  • Enameled (magnet) wire has a thin insulating film so touching turns do not short, and is used for wound coils.
  • For a bare-wire coil, keep turns separated or add an insulation layer where they would contact.

Custom Lengths and Requirements

6N solid OCC wire is supplied in continuous lengths or on spools to the order. Diameters outside the standard ultra-fine range, specified spool lengths, or additional processing are handled as custom orders, with handling time extended according to the difficulty and complexity of the work. Every standard variant uses the same 6N, 99.9999% single-crystal copper material.

Shipping & Delivery

Standard (in-stock) 6N solid OCC wire ships within 1–5 business days.

Custom-cut or processed orders require additional handling time based on processing difficulty and complexity.

After shipment, delivery typically takes 7–15 days to arrive, depending on the destination.

6N Single Crystal Copper Wire FAQ

What does OCC mean?

OCC stands for Ohno Continuous Casting, a process that forms copper into a long, continuous single-crystal structure with far fewer grain boundaries than ordinary drawn copper.

What does 6N mean?

6N indicates 99.9999% purity. Purity documentation is available for this material; it is not the same as lower-purity 4N or ordinary copper.

Is this wire solid, stranded, or insulated?

It is one single solid strand and is bare, with no enamel or plastic insulation. Cable builders add their own sleeving or combine several fine strands.

What diameter range does this OCC wire cover?

The ultra-fine range covers 0.01mm to 0.05mm, ordered by millimeter with approximate AWG shown (about 38 AWG to 24 AWG).

What is 6N OCC wire used for?

HiFi interconnects and internal wiring, headphone and earphone cables, fine signal paths, small coil and probe winding, and precision audio and experimental builds.

Does bare OCC wire solder easily?

Yes. With no coating to remove, bare single-crystal copper solders quickly with fine solder and flux for clean signal joints.


Related products: OCC Wire Collection · Fine Copper 110 Wire · Copper Foil · Heavy Copper Wire
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