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Silent Angel

Silent Angel F1 Linear Power Supply

Silent Angel F1 Linear Power Supply

Why Buy From Kronos AV? Here are just a few reasons...
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FREE 5 YEAR WARRANTY INCLUDED FREE 5 year warranty included on this item
Regular price £469.00
Regular price Sale price £469.00
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A Path to The Clear and Fresh Audio Forest

Forester F1, a reliable linear power supply tailored for N8 and Raspberry Pi 4 Model B.

The aim of F1 is to bring the most real, pure and intact voice to audience.

Zero noise, zero data corruption and zero power break-off, to feel the touch of winds, step into sunshine and hear the slight friction sound of leaves. Not matter wave’s lapping or rabbits’ whispers, all sounds can be distinguished.

To fulfill all Hi-Fi requirements on stable power source and multiple output connector type, Silent Angel perfectly adds multiple technologies, as high-efficiency toroidal transformer, advanced fully symmetric circuit design, low noise MOSFET in parallel and EMI filter.

With stable electricity input to ensure the consistency and integrity of the music enjoyment.

The LAN port on the Hi-Fi brings new challenge to power supply.

To playback digital music or high resolution music, network player needs to handle about 200MB - 1GB data for DSD format music in 5 minutes.

The working frequency is at least 1,000 times that a normal linear power can handle.

F1 is the solution to high frequency nature of network for 5V powered network devices (such as: Bonn N8), network audio player, Raspberry Pi board, etc.

Optimal Material

The shell of F1 consists of high-quality-thick material to reduce vibration of transformer.

The panel adopts CNC progressing to ensure congruence.

Toroidal-symmetric Transformer

The improvement of efficiency is obvious. 

The core permeability of toroidal design is higher than the laminated one, which conduces to the electrical efficiency of transformer trend better consequently.

In addition, the energy-saving superiority of toroidal design is that the no-load current is merely 10% comparing with the laminated one.

Advanced Full Symmetric Circuit

A distinct advantage of F1.

This design can eliminate noise inside mostly, the symmetric circuit is able to consolidate the accuracy of power output and ensure a stable power supply.

Low Noise MOSFET Parallelled

MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a vital component for F1 to control voltage output.

As MOSFET controls output by adjusting the gate voltage, its gate drive circuit is less complex than BJT’s base drive circuit.

As a result of less complex design, the switching frequency of MOSFET is higher than BJT’s, which supports a more precise and stable voltage output.

Effective Protection Mechanism

Adopting an output voltage detection circuit, an output current protection circuit.

Two temperature protection circuits to cut off the output. Preventing from damaging the device when unexpected failures.

As tailored for N8 and Raspberry Pie 4 Model B.

F1 covers two pairs of connectors, which consists of one USB and one DC plugs, and there are two 60cm x 5.5mm x 2.1mm DC plug to 5.5mm x 2.1mm DC plug  in packing box to help users to connect F1 to other appliances. 


Dimensions: 155mm (W) x 115mm (D) x 58mm (H)
Device Weight: 1.3KG
Input: 230VAC or 115VAC 50/60Hz (with voltage selector)
Output: Dual 5V@2A
Output Connectors: DC PLUG *2, USB Type-A Female Connectos *2
LED indicators: Status LED *2, Over-Temperature-Protection LED *2


1.2m IEC Type AC Power Cord *1
60cm DC Plug (5.5mmx2.1mm) to DC Plug (5.5mmx2.1mm) Cable *2
Quick Start Guide *1
Warranty Card *1

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