The ultimate Power Supply Units for music servers (and other devices for cleaner power source)

[marce]

https://www.audioxpress.com/article/Power-Transformers-for-Audio-Equipment

[marce]

10 hours ago, The Computer Audiophile said:

Many people have zero interest in conducting such research. They’d rather live and let listen. 

As long as what they are listening to supports their beliefs...😉

Sorry but there is often too much venom spilt when someone posts a reasonable post from the opposite camp.

[marce]

9 hours ago, sandyk said:

 

 Modern LEDs are low noise devices that are frequently used as low noise voltage references. e.g. the Walt Jung Low Noise Voltage Regulator.

They will not generate noise unless they are multiplexed (switched) as in a typical numeric display.

 

 However, if the brightness of the LEDs disturbs you ..….

Modern LED lighting is controlled by high frequency drivers though... Many produced to a price, I have one to replace with a squealing capacitor.

[marce]

A main PSU cannot react fast enough to the digital switching requirements on its own, a main PSU should provide clean steady power to the on board power delivery system, this is especially important on complex designs such as motherboards,  and other digital digital/analogue designs with multiple point of load power requirements and fast switching.

The front end could be linear or SMPS, as long as its a good clean supply.

[marce]

That is electrical contact resistance, not the power supplies internal impedance. At 1 amp current you'll drop 30mV (at the max. figure), just add this figure to the drop on the cable (determined by the cable's  resistance) and you'll have your total voltage drop from supply to load.

[marce]

Think of the power supply impedance (a mixture or resistance, inductance and capacitance) as the supply resistance to current flow, when a load demands more current the output impedance indicates how fast and accurately the supply can handle this current demand, the dynamic operation of the supply.

The connector and wire resistances are static and follow ohms law, and are resistance only., so they will drop the supply voltage depending on the current drawn.

Supply impedance is how fast the supply can accelerate, the lower the figure the better for a voltage source, 0 being the best. Consider 0 a turbo charged car it can do 0-60 in 2 sec, a supply impedance of say 10R would give 0-60 in 10 sec. The connector and cable resistance is the same as the road, tyre resistance, separate to the power of the engine!!!

Hope this helps illustrate the difference between the two.