What's different between
Class A PSU and Linear PSU ?
1, The different like the class A amp than the class B amp .The Class A
PSU is a class A design PSU, it suit the small current request
circuits, like DA chip, OPAs, DAC output stages , preamp gain stage.
The Linear PSU is the linear design, it can output large current less limit.
2, In sound, the Class A PSU have more neutral, more extend , blacker
AC IN: Connect the transformer AC output.
V- OUT : Negative voltage output.
GND : On bard the two PSU is separate, if users use for power
supply same circuit parts, please connect the two GND together， then
connect to the circuits.
V+ OUT : Positive voltage output.
Must read before operate :
1, This is a Pure Class A PSU,
its current output had limit at less 30mA than idle current .If
you want the PSU had higher idle current , please contact :
2, If you want large power supply, dual V+ (V-) output, please
contact us for custom order.
3, The pure class A PSU can't working long time without connect the load
4, In default, the PSU input DC voltage is higher 5 to 12V than output
voltage. For example, if output is +3.3V, the input DC voltage is
between +8V to +15V, so your transformer output AC voltage is around 6V
to 12V AC. If you want the PSU can working with higher AC voltage ,
please inform while place the order . We want to replace the larger
heatsink on board.
5, This design for the best sound quality, it had not applied negative
feedback, so its output voltage will drop a little while it become warm,
this is no problems for digital audio and analog audio designs.
The advantage of the Class A PSU :
The Class A design always is
the best design in audio field .
The class A PSU had some
limit , the heat is a little hotter than the normal PSU ,
the output current have limit , but
these all are not the points, it have the most neutral sound reproduce
keep most DIYers like to applied it in their gears.
The Class A PSU had
very high input impedance and low output impedance can avoid power
disturbs . It working at class A state , have the fastest output current
In our test , the Pure
class A PSU had better sound than battery.