When connected to the 40 AMP, the 40 PSU provides the power amp section with a serious boost of clean power, further stiffening the main power supply rails to the amplifier, meaning that the amplified signal can more accurately track the input signal. You hear this accuracy in the music which becomes more transparent and more detailed. The Pre-Amp section is completely driven by the 40 PSU, again this means a stiffer supply – leading to greater accuracy.
This leaves the internal power supply to run the DAC section, and because it is now doing less work, the supply it can provide to the DAC is more robust. In our listening tests we observed a massive improvement on the 40 AMP. We got more weight, more authority, better detail, better attack, overall better control of rise and fall of notes, and more accurate timing.
 
Specification
Low voltage supply - Standby mode +5V DC
Low voltage supply - Operational +5V DC
Fixed voltage supply - Standby mode 0V
Fixed voltage supply - Operational +24V DC
Variable supply - Standby mode 0V
Variable supply - Regulated +10V to +45V DC
Variable supply - Unregulated +45V or +56V DC
Mini USB For Firmware Updates
Size (H x W x D) 88 x 220 x 365 mm (3.46” x 8.66” x 14.37”)
Weight 9.4kg (21lbs)