Any DC power supply within the range of 7v – 16v DC with sufficient power (> 12vA) can be used.
Further question: Also, if my DAC is not powered by USB, what voltage is recommended for the micro IUSB3.0? Could a 5v or 12v input from the linear power supply be used?
Answer: There is no specific voltage recommendation other than that this range should not be exceeded in either direction and it is not related to the fact if power is drawn from USB port(s) or not. Most linear power supplies will tend to have worse noise than the supplied iPower and if using an inadequate linear power supply the performance of the iPower may be worse than using the original power supply.
