Ultra-Low Noise Triple-Rail Linear Power Supply

ULTRA-LOW NOISE LINEAR REGULATION | TRIPLE-RAIL ARCHITECTURE |

INDEPENDENT POWER RAILS | DESIGNED FOR SMALL-SIGNAL ANALOG STAGES

Silentio 305

Designed and Manufactured by Nereneas

Silentio is a precision-built linear power supply designed for ultra-sensitive small-signal analog circuits.

In high-gain audio electronics such as tape head preamplifiers or phono stages, the quality of the power supply becomes critical. Even small amounts of noise present in the power rails can be amplified together with the signal.

Silentio was developed to provide exceptionally clean and stable power, allowing analog circuits to operate at their full performance potential.

ULTRA-LOW NOISE POWER DELIVERY

Silentio is built around one essential principle:

• the power supply must remain sonically invisible

Instead of relying on switching converters or generic regulators, Silentio uses a carefully optimized linear power architecture designed to minimize noise, ripple, and power-rail interference.

The result is a power supply that allows the audio circuit to perform exactly as intended.

Silentio achieves an ultra-low noise floor of just 0.8 µVrms, ensuring that even the most sensitive small-signal analog stages operate without power-supply contamination.

• 0.8 µVrms output noise
• ultra-low noise performance
• stable voltage regulation
• no switching artifacts

PRECISION REGULATION STAGES

SILENTIO power board

Each rail is independently regulated using LT3045 and LT3094 devices, ensuring vanishingly low ripple and perfectly symmetrical voltage delivery.

Close-up images of the LT3045 and LT3094 regulators from the SILENTIO power board

These regulators are widely regarded among audio engineers as some of the lowest-noise linear regulators available, making them ideal for powering small-signal analog stages where power integrity directly affects sonic performance.

Combined with carefully selected filtering components and a clean PCB layout, the result is a power delivery system optimized for extreme noise performance and long-term stability.

TRIPLE-RAIL ARCHITECTURE

Inside SILENTIO PSU

Silentio provides three independent regulated rails, designed specifically for powering sensitive small-signal analog electronics.

In high-gain audio circuits, interactions between different supply rails can introduce subtle noise and instability. By separating the rails and regulating them independently, Silentio ensures that each stage receives clean, stable, and isolated power.

This approach minimizes cross-interaction between circuit sections and preserves the integrity of delicate analog signals.

The triple-rail architecture is particularly beneficial for devices such as:

• tape head preamplifiers
• cassette head preamplifiers
• phono stages
• precision analog circuits

By maintaining extremely low noise across all rails, Silentio allows these circuits to operate with maximum transparency and stability.

Why a Separate Power Supply

High-gain analog circuits operate at extremely small signal levels. In devices such as tape head preamplifiers or phono stages, the input signal can be only a few microvolts.

At this level, even minimal electrical interference from the mains transformer, rectification stage, or power filtering network can influence the signal path.

By placing the power supply in a separate enclosure, Silentio keeps the sensitive analog circuitry physically isolated from the components that generate electromagnetic fields and mechanical vibration.

This separation allows the powered device to operate in a cleaner electrical and mechanical environment, improving overall system performance.

• reduced electromagnetic interference
• minimized mechanical vibration
• cleaner signal environment
• improved system stability

The result is a power architecture designed specifically for ultra-sensitive analog electronics.

DESIGNED FOR SYSTEM INTEGRATION

Backside of the SILENTIO

Silentio is housed in a rigid steel enclosure, designed to provide mechanical stability and effective electromagnetic shielding.

The internal layout keeps sensitive regulation stages isolated from the mains section, helping maintain clean power delivery.

The rear panel provides a robust locking power connector, ensuring reliable connection to compatible Nereneas devices.

Integrated linear power supply and control electronics, carefully separated from the audio signal path.

aRCA includes a fully integrated linear power supply designed for stable and reliable operation.

The transformer and control electronics are carefully positioned to remain physically separated from the audio signal path, minimizing the possibility of interference.

Once the switching state is set, the latching relay architecture maintains the selected signal path with absolute stability, requiring no continuous power to preserve the connection.

Machined aluminum isolation feet provide a stable mechanical interface between aRCA and the supporting surface.

aRCA rests on solid aluminum isolation feet, designed to provide mechanical stability and reduce the transmission of external vibrations.

Machined from solid aluminum and finished to match the aesthetic of the chassis, the feet provide a stable mechanical interface between the component and the supporting surface.

This approach contributes to the overall rigidity, stability, and long-term durability of the unit while maintaining the refined visual identity of the product

Designed for ANalog Systems

Rear panel of aRCA showing the RCA inputs and outputs

aRCA is optimized for high-end single-ended analog audio setups.

The rear panel provides:

• 5 × RCA inputs
• 2 × RCA outputs

This allows aRCA to act as a central hub for complex audio systems, connecting multiple sources, DACs, tape machines, or preamplifiers.

The result is a stable and extremely short signal path between components.

True Power Control

A discreet power switch is located underneath the front-left corner of aRCA...

A discreet power switch is located underneath the front-left corner of aRCA, allowing the unit to be completely powered off rather than placed in standby.

The current switching state is stored in non-volatile memory (EEPROM), so when the unit is powered on again, aRCA automatically restores the previously selected configuration.

Thanks to the latching relay architecture, power-up is completely silent, with no switching noise or audible clicks during startup.

  • Inputs
    5 × single-ended RCA

    Outputs
    2 × single-ended RCA

    Switching
    Latching relays

    Control
    Capacitive touch interface

    Power supply
    Internal transformer

    Chassis
    Powder-coated steel 1.5 mm steel chassis providing mechanical and EM shielding

    Ultra-flat enclosure

    Hand-assembled and individually tested in Romania

    Warranty: 2 years from the date of purchase (parts and labor)

  • Inputs: RCA, single-ended
    Outputs: RCA, single-ended

    Power: Standard IEC 60320 C8 inlet

  • Width: 301 mm

    Depth: 203 mm

    Height: 70 mm (with feet)
    55mm (without feet)

    Weight: 3.5 kg

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