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Pure Class A  Discrete PSU
High Speed & Low Noise

Price:   (Included two group PSUs, Exclude shipping cost)

       Pure Class A PSU design, with dual V+ or dual V- output, offer the best speed, lowest noise and most neutral sound .
       Idle Current 80mA , and can custom order with other idle current parameter  .
       Temperature Range : 0°C to 85°C
        Installation :L51 x W89 x H45   (mm, without feet)
        Quality Components: Custom order NOVER (England brand) , WIMA capacitor , Toshiba transistors ect.
 Applied: For CDP, DAC, Preamp and power amp gain stages modify . ( Can't working for laser and motors drive circuits in CDP)

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 background .
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 response.   
          In our test , the Pure class A PSU had better sound than battery.

Detail views



VIN: Connect the DC power.
Vout1 and Vout2 :  Voltage output.
GND : Power ground .

Must read before operate :
1, This is a Pure Class A PSU, its current output had limit .If you want the PSU had higher idle current (not over 200mA), please contact  :  audio-gd@vip.163.com .
2,  Only support dual + or dual - voltage outputs.
3, The pure class A PSU can't working long time without connect the load circuit.
4, In default, the PSU input DC voltage is higher 3 to 12V than output voltage. For example, if output is +3.3V, the input DC voltage is between +6V to +15V.
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.

Model Output voltage (VDC) Max output current (mA)
and I
nput voltage range (VDC)
PSU-2019-3V3 Dual+3V3 80mA / 6-15V
120mA / 6-12V
160mA / 6-9V
PSU-2019-5V Dual+5V Or Dual-5V 80mA / 8-18V
120mA / 8-15V
160mA / 8-12V
PSU-2019-9V Dual+9V Or Dual-9V 80mA / 12-20V
120mA / 12-18V
160mA / 12-15V
PSU-2019-12V Dual+12V Or Dual-12V 80mA / 15-24V
120mA / 15-22V
PSU-2019-15V Dual+15V Or Dual-15V 80mA / 18-30V
120mA / 18-26V
PSU-2019-18V Dual+18V Or Dual-18V 80mA / 22-30V
120mA / 22-28V
PSU-2019-24V Dual+24V Or Dual-24V 80mA / 28-36V
PSU-2019-36V Dual+36V Or Dual-36V 80mA / 40-46V
PSU-2019-45V Dual+45V Or Dual-45V 60mA / 48-56V
Custom order If the input voltage higher voltage than upon form specs, please replace by large heatsink, or install the transistors on metal chassis board.
This DIY kit without warranty.
If you want larger current output (not over 200mA), please contact  audio-gd@126.com




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