YONGSE
Shipping to
Estimated delivery on
Canada, Mexico, Romania, United States: import duty of 10 USD
Couldn't load pickup availability
The YONGSE Koi Fish is a premium IEM upgrade cable that combines 16-core Litz 29AWG pure silver gold-plated conductors with 28AWG 5N pure silver in a hybrid construction, delivering exceptional signal purity, extended treble clarity, and a refined, musical presentation. Terminated with a standard 0.78mm 2-pin connector, it is compatible with a wide range of IEMs and available in 3.5mm and 4.4mm balanced configurations.
🎨 Custom Termination Available
This cable can be customized to match your IEM's connector type. If you need a different plug or connector configuration, please contact our customer service before placing your order and we will arrange a custom build for you.
16-Core Litz Construction 29AWG Pure Silver Gold-Plated 28AWG 5N Pure Silver 0.78mm 2-Pin Connector 4.4mm Balanced / 3.5mm SE 1.2m Length Custom Termination Available YONGSE Brand
16-Core Litz Pure Silver Gold-Plated Construction
The Koi Fish uses a 16-core Litz 29AWG pure silver gold-plated conductor geometry, where each strand is individually insulated to minimize skin effect and proximity effect. The gold plating further enhances conductivity and long-term oxidation resistance, preserving signal integrity over time.
5N Pure Silver Hybrid Design
Paired with 28AWG 5N (99.999%) pure silver conductors, the Koi Fish achieves a hybrid construction that balances the warmth and body of silver-plated copper with the extended resolution and air of pure silver — resulting in a natural, detailed, and fatigue-free sound signature.
0.78mm 2-Pin Connector — Wide IEM Compatibility
The standard 0.78mm recessed 2-pin termination ensures compatibility with a broad range of IEMs from brands including YONGSE, Kinera, DUNU, Moondrop, and many others. A reliable, secure connection with no wobble or signal loss.
4.4mm Balanced Termination — Full Balanced Output
Available in 4.4mm Pentaconn balanced and 3.5mm single-ended configurations, the Koi Fish is ready for use with balanced DAPs, DAC/amps, and portable sources to unlock the full dynamic range and channel separation of your IEMs.
Custom Termination — Built for Your IEM
Need a different connector? The Koi Fish can be custom-built to match your specific IEM plug type (e.g. Sennheiser MMCX, A2DC, IPX, etc.). Simply contact our customer service team before ordering and we will arrange a bespoke configuration for you.
Premium Craftsmanship
At approximately 1.2m in length, the Koi Fish is ergonomically sized for portable and desktop use. The cable features a supple, low-microphonic jacket with a refined aesthetic — a worthy visual and sonic upgrade for any high-end IEM.
YONGSE Koi Fish Cable × 1
| Brand | YONGSE |
| Model | Koi Fish |
| Conductor Material | 16-Core Litz 29AWG Pure Silver Gold-Plated + 28AWG 5N Pure Silver |
| Core Count | 16 Cores |
| IEM Connector | 0.78mm Recessed 2-Pin (Custom available) |
| Plug Termination | 3.5mm Single-Ended / 4.4mm Balanced (Custom available) |
| Length | Approx. 1.2m |
| Customization | Yes — contact customer service for custom connector/termination options |
A new tariff system will take effect across all 27 EU member states starting 1 July 2026. The EU is abolishing the duty exemption for low-value parcels — all goods entering the EU will now be subject to customs duties, including a fixed duty of €3 per HS tariff code category for IOSS-declared goods under €150.
A handling surcharge of USD $5 has been applied to all standard shipments to EU countries on orders under $100. Orders over 100 qualify for free expedited shipping.
We collaborate with the following courier companies:
In the event that a shipment is refused, undeliverable, or returned to sender, HiFiCat will process a refund to the original payment method. If a customer requests reshipment, a reshipment fee will apply. A restocking fee of up to 20% may also apply.
All taxes and duties are prepaid (DDP). 5–10 working days. Free standard shipping.
Tracking examples:
Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Cyprus
All taxes and duties are prepaid (DDP). 10–15 working days.
💰 Shipping cost: $5.00 USD (orders $0–$100) | Free (orders $500+, via DHL Express)
Tracking examples:
Norway, Switzerland, Ukraine, Armenia, North Macedonia, Moldova, Monaco, San Marino, Vatican City, Serbia, Albania, Kosovo, Montenegro, Bosnia & Herzegovina, Belarus, Georgia, Andorra, Guernsey, Jersey, Faroe Islands, Svalbard & Jan Mayen, Guadeloupe, Réunion, Gibraltar, Isle of Man, Mayotte, Iceland, Liechtenstein, Turkey
All taxes and duties are prepaid (DDP). 10–15 working days. Free standard shipping.
Main tracking portal: https://t.17track.net/
📧 Email: support@thehificat.com
📞 Tel: +8619270016096
