Ferrum Audio Link DC power cord
Complementary products
Ferrum Audio Power Link DC Cable
Between the HYPSOS power supply and components from the Ferrum range, the quality of the current delivered depends as much on the cable as on the source itself. The Power Link DC embodies this belief with a four-conductor architecture that separates power delivery from its control. This proprietary approach, called Ferrum Power Link (FPL), enables real-time regulation of the voltage supplied to the connected device.
An architecture designed for electrical precision
The Power Link DC is based on the principle of 4-Terminal Sensing (4TSD), a measurement technique used in precision instrumentation. Two of the four conductors carry current to the powered device, while the other two provide a feedback loop to the HYPSOS. This configuration allows the power supply to measure the exact voltage at the device’s input, rather than just at its own output.
The inherent resistance of any cable normally causes a voltage drop between the source and the load. On a traditional two-conductor DC cable, this loss remains invisible to the power supply and therefore impossible to correct. The Power Link’s feedback circuit allows HYPSOS to instantly compensate for these variations, maintaining a stable voltage regardless of the connected device’s changing power draw.
Carefully engineered construction and finish
Manufactured in Poland like all Ferrum products, the Power Link DC is 50 centimeters long and uses four-pin Weipu connectors with gold-plated contacts. This surface treatment ensures optimal conductivity and long-term resistance to oxidation.
The cable length matches the compact dimensions of the Ferrum ecosystem: HYPSOS and compatible devices share the same footprint and naturally stack together. For setups where a greater distance is needed, it is advisable to check with the manufacturer for available options.
Devices compatible with the FPL link
The proprietary 4-pin connector features on several products in the range:
- OOR: headphone amplifier and preamplifier
- ERCO and ERCO Gen 2: combined DAC and headphone amplifier
- WANDLA and WANDLA HP: converters and preamplifiers
Each of these devices works with its original power adapter, but the FPL connection via HYPSOS activates 4TSD mode and fully exploits the hybrid power supply’s regulation capabilities. Without this specific cable, the benefits of four-point sensing remain inaccessible, even when using a standard DC cable to the HYPSOS.
A key link in a coherent system
The Power Link DC is not a universal accessory but a component dedicated to the Ferrum ecosystem. Its relevance depends directly on owning the HYPSOS and at least one compatible device. For users with this combination, it is the technical link that allows both elements to communicate and mutually optimize their performance.
This cable is not systematically included with the HYPSOS: some bundles include it, others do not. It is therefore important to check when purchasing the power supply unit to avoid having to place a separate order later.
Technical specifications
Connectivity
- Connector type: 4-pin DC
Technical construction
- Configuration: 4 conductors
- 2 conductors dedicated to power supply
- 2 conductors dedicated to feedback
- Technology: proprietary Ferrum Power Link (FPL)
- For a perfectly stable, noise-free power supply
Materials
- Contact plating: gold
Compatibility
- High-end HYPSOS power supply
- OOR headphone amplifier / preamplifier
Frequently Asked Questions
Is the Power Link DC essential for using HYPSOS with a Ferrum device?
No, Ferrum devices also feature a standard DC input (5.5 × 2.5 mm) that can be used with the cables supplied with the HYPSOS. However, the FPL Power Link enables the 4-Terminal Sensing function, which is not otherwise available. Without it, HYPSOS operates but without an active feedback loop.
Can I use this cable with devices from other brands?
No, the 4-pin FPL connector is proprietary and is only fitted to compatible Ferrum products (OOR, ERCO, WANDLA and their variants). Third-party devices require the standard DC cables supplied with the HYPSOS.
What audible difference can be expected with this cable?
Ferrum states that the FPL link improves transient response and power supply stability. In practice, perceived benefits vary depending on the listener’s sensitivity, the quality of the rest of the system, and listening conditions. The improvement mainly concerns dynamics and precision rather than tonal coloration.
How do I activate the 4TSD function on HYPSOS once the cable is connected?
The 4-Terminal Sensing mode is activated in the HYPSOS menu. A dedicated pictogram on the OLED display indicates its status (active or inactive). According to Ferrum’s documentation, this mode brings greater clarity and resolution, while disabling it produces a sound described as more “relaxed.”
- Eco-contribution included in the sale price.
