Hifisonix Standard PSU

Hifisonix Standard PSU

Here is a low noise general purpose linear power supply that can be used to power the HPA-1 Headphone amplifier or any other low noise small signal application.

The Hifisonix Standard PSU features low noise, up to 400mA per rail output current, a MUTE relay driver to ensure when the load powers up or down there are no clicks or thumps, a +12V 40mA relay PSU and an auxiliary +5 or +3.3V supply (60mA).

There are no pots on Standard PSU. This means the output voltage spread given the LM317 reference voltage tolerance of 4% and 1% resistors is in the region of +-6% (total spread c. 12%) which is too great. This simple spread sheet below will allow you to trim the output voltage to exactly +-18V – full instructions in the spread sheet.

You can buy PCB’s by clicking on the link below. All PCB’s are shipped traced and signed for.

Hifisonix Standard PSU

You can also buy a Standard PSU + HPA-1 Headphone Amplifier PCB bundle to save on shipping costs – please go to the X-Altra HPA-1 page for details http://hifisonix.com/hpa-1-class-a-headphone-amplifier/