YONGSE BlackSea Earphone Upgrade Cable | 27AWG Litz Coaxial OCC + SPC + Graphene Shielded

The YONGSE BlackSea Upgrade Earphone Cable is a reliable, high-value HiFi replacement cable favored by budget-conscious audiophiles looking for a meaningful step up from stock IEM cables. Featuring a sophisticated Litz coaxial structure with 27AWG conductors combining silver-plated copper (SPC), OCC-grade cores and graphene shielding, it provides enhanced clarity, tighter bass control, reduced interference, and a subtly wider soundstage—delivering cleaner, more open presentation without veering into thin or harsh territory.

Ideal for everyday upgrades, the BlackSea adds a touch of warmth and smoothness, cleans up muddy lows on bass-heavy sets, and improves imaging/layering for a more engaging listen—all at an accessible price point.

Key Features

• Conductor Design: 27AWG Litz coaxial hybrid — SPC for speed and extension, OCC for natural warmth and low distortion, plus graphene for superior EMI/RFI shielding and a blacker noise floor.
• Build & Comfort: Nicely braided for a clean, premium look; low microphonics (minimal rubbing noise against clothes); ergonomic ear hooks and Y-split for secure, fatigue-free fit during long sessions.
• Length: ~1.2m — practical for pocket/portable use without excess drag.
• Connectors:
  • Plug: 4.4mm balanced (gold-plated for optimal conductivity and corrosion resistance).
  • Earpiece: 0.78mm 2-pin (standard; compatible with most modern IEMs).
• Compatibility: Works seamlessly with popular brands like TANGZU, Hisenior, CVJ, KZ, TRN, Moondrop, and many others using standard 0.78mm 2-pin connectors. Perfect match for balanced outputs on DAPs, dongles, or players.
• In the Box: Yongse BlackSea cable × 1 pc.

Why Choose the Yongse BlackSea Upgrade Cable?

Upgraders often notice:

• Improved Clarity & Detail — Better separation and micro-details emerge with a cleaner background.
• Balanced & Musical Tuning — Adds subtle warmth/smoothness, tightens bass, and opens up the soundstage for natural timbre across genres.
• Practical Performance — Low noise, tangle-resistant, comfortable for daily wear, and great value—no overhyped claims, just solid, audible improvements.
• Build Quality — Feels premium in hand with durable braiding and hardware, yet remains lightweight and flexible.

It's not a transformative "flagship" cable, but in the sub-$50 category, it's consistently praised as one of the better all-rounders for squeezing more performance from your IEMs.

Pairing Suggestions

The BlackSea's hybrid SPC + OCC + graphene signature pairs excellently with:

• Bass-heavy or Warm Sets (e.g., KZ, TRN, or CVJ models) — Tightens lows, reduces muddiness, and adds air/clarity.
• Neutral/Mid-Focused Chi-Fi (e.g., Moondrop, Tangzu, or 7Hz hybrids) — Enhances openness, imaging, and vocal smoothness without brightness.
• High-Sensitivity Budget IEMs — Delivers cleaner drive and dynamics on portable balanced sources like dongles or entry DAPs.

Its versatile, non-fatiguing profile works well for pop, EDM, rock, and acoustic—making it a go-to "safe" upgrade for most setups!

Product Specifications

• Brand: YONGSE
• Model: BlackSea
• Conductor: 27AWG Litz coaxial – SPC + OCC + Graphene
• Cable Length: ~1.2m
• Plug: 4.4mm balanced
• Connector: 0.78mm 2-pin
• Design: Braided, low-microphonics, ergonomic hooks
• Item Includes: Yongse BlackSea Cable × 1 pc

About Yongse 

Yongse is a leading Chinese manufacturer specializing in high-precision audio cables and upgrade solutions. With a strong focus on genuine premium materials (including OCC single-crystal copper, silver-plated variants, and advanced hybrids like graphene), strict ISO-certified production, and consistent quality control, Yongse has earned a global following for delivering exceptional price-to-performance cables trusted by audiophiles and supplied to major brands.