In a DAC system, the controller and DAC chip are working at 5V or 3.3V. This can be easily powered by USB. But some DAC need a operational amplifier buffer or driving output stage, it need 12V-18V.
A stand alone power supply may be the best solution, but it really make users uncomfortable. A 5V to 12V DC-DC converter may be a solution, but some said the DC-DC will make the sound quality worse. I understand the total power of this solution is limited. For a headphone amplifier it may cause problem, but digital source doesn't need much power.
High frequency noise is another problem. But this can be avoid by using high freq DCDC chip and good shielding.
So, what other side effects of DCDC will meet in a DAC system? How to deal with it?
A stand alone power supply may be the best solution, but it really make users uncomfortable. A 5V to 12V DC-DC converter may be a solution, but some said the DC-DC will make the sound quality worse. I understand the total power of this solution is limited. For a headphone amplifier it may cause problem, but digital source doesn't need much power.
High frequency noise is another problem. But this can be avoid by using high freq DCDC chip and good shielding.
So, what other side effects of DCDC will meet in a DAC system? How to deal with it?