Internal Wiring for In Ear Monitors

Precision Inside, Performance Outside

Linum estron Internal Wiring for IEMs

Consistent Quality and Maximum Product Safety

Pre-Tinned and Ready to Use

Delivered in fixed lengths, with short and accurate tinning for faster and safer assembly.

Designed for Stability and Signal Integrity

Silver-plated, enamelled litz wires that minimise the risk of short circuits and acoustic feedback.

Easy Handling with SWH™

The Small Wire Harness simplifies assembly, improving efficiency and product consistency in earphone and IEM manufacturing.

Reliable Internal Wiring for Professional Earphones & IEMs

The internal wiring may be a small detail—but it plays a big role in the overall quality of your product.
With decades of experience in hearing instruments and audio applications, estron offers internal wires that meet the highest demands for durability, safety, and ease of integration.

Choose from two specialised solutions:

  • SWH™ (Small Wire Harness) – Pre-assembled multi-stranded wire harness for fast, reliable internal connections
  • ESW™ (Extra Strong Wire) – Durable, individually tinned litz wires for precision assembly


Both options are designed to reduce handling complexity, improve production safety, and ensure stable signal performance in every unit.

Standard Recommended Variants:

  • SWH™ – 2 or 3 conductors, 30 mm standard length
  • ESW™ – Single litz wire, available in multiple colours


Packaging:
Standard boxes of 1000 pcs. / Bags of 50 pcs.
Applications: Internal wiring for IEMs, earphones, hearing aids, communication devices

  • Construction: Pair or tri-twisted ESWTM litz wires
  • Conductor: 7x Ø0.050mm silver-plated copper
  • Resistance: 1.40 Ω/m
  • Tinning: 0.5mm ± 0.2mm
  • Colours: Red, Blue, Black
  • Soldering: Max 390°C for 0.5 seconds
  • Construction: Single EWS litz wire 7x Ø0.050mm
  • Conductor: 7x Ø0.050mm silver-plated copper
  • Resistance: 1.30 Ω/m
  • Tinning: 0.5mm ± 0.2mm
  • Colours: Red, Green, Blue
  • Soldering: Max 390°C for 0.5 seconds
  • Simplifies wire handling and placement
  • Minimises assembly errors and rework
  • Improves consistency across production batches
  • 30 mm standard lengths available off-the-shelf
  • Other constructions and colours on request (MOQ applies)
  • Sample sheets available – Contact sales@estron.dk

For more information and variants check: https://www.estron.dk/products/litz-wires/