Linsoul Terras IEM Cable — 4N Single-Crystal Copper

The Linsoul Kiwi Ears x B_Media Terras Black Edition is a 1.25m, 4-core 4N single-crystal copper upgrade cable with modular 3.5mm, 4.4mm and USB-C plugs built for clearer, balanced playback and everyday durability.

Designed in collaboration with Axel Bostrom of B_Media, the Terras Black Edition pairs high-purity single-crystal copper conductors with a flexible, tough outer sheath to improve signal transmission while resisting daily wear. It’s a purpose-built replacement cable for IEMs that need a refined tonal balance — tighter lows, fuller mids and detailed treble — and a modular plug system so you can switch between consumer and balanced outputs quickly.

How does this cable change my IEM sound?

Using 4N single-crystal copper and a Litz-style 32AWG braid reduces signal distortion and enhances conductivity for clearer detail across frequencies. Expect a more natural presentation with controlled low end, present mids and crisp high frequencies without harshness.

• 4N single-crystal copper for improved signal purity and resolution
• Litz-style braid to minimize interference and maintain transparency
• 32AWG wires offering a balance of flexibility and reliable transfer
• Tonal outcome: tighter bass, forward mids, lively yet smooth treble

What makes the Terras durable and comfortable for daily use?

The cable is sleeved in a 400D bulletproof fibre-style jacket that provides high abrasion resistance while remaining pliable. The build reduces microphonic noise and stands up to repeated handling, making it a practical choice for commuters, performers, and everyday listeners.

• 400D tough outer sheath resists abrasion and daily wear
• Designer braid pattern enhances flexibility and longevity
• Reduced microphonics for quieter movement noise on the go
• Robust strain reliefs at connectors for long-term reliability

How does the modular plug system improve compatibility?

The Terras features a swap-capable connector that accepts 3.5mm, 4.4mm or USB-C terminations, so one cable services phones, DAPs, laptops and balanced rigs without buying separate leads. Changing plugs is straightforward, giving instant connectivity across devices and scenarios.

• Interchangeable plugs: 3.5mm unbalanced, 4.4mm balanced, USB-C digital
• Works with DAC/AMPs, portable players, laptops and USB-C smartphones
• No soldering or adapters required—simple modular swap design
• Ideal for switching between casual and high-resolution setups

Can I expect any trade-offs with this cable?

As an upgraded copper cable, the Terras emphasizes musicality and detail rather than changing an IEM’s core tuning dramatically. It’s heavier than ultra-thin stock leads but designed to remain flexible; users prioritizing absolute lightness may notice the added heft for durability gains.

• Improved detail and clarity without drastically altering timbre
• Slightly more substantial feel than featherweight stock cables
• Designed to balance robustness with wearable comfort

Who is this for: The Linsoul Kiwi Ears x B_Media Terras Black Edition suits audiophiles and musicians who want a dependable, sonically transparent upgrade for in-ear monitors. It’s well matched to users who need modular connectivity across devices, seek improved clarity and durability over stock cables, and prefer a balanced sound with enhanced low-end control. If you own high-resolution IEMs like Astral Orchestra II, Arete, or Hype4 and want a daily-driver cable that combines refined audio performance with rugged build quality, the Terras is built for that role.