The impedance of a pair of headphones determines the amount of energy needed to operate them. If the impedance is greater than 100 ohms, we recommend you use an amplifier. For an impedance of 80 ohms or less, a simple smartphone or tablet may be enough to power the headphones.
However, we recommend that you use a digital-to-analogue converter (DAC) to take full advantage of your headphones’ performance. There are several reasons for this: using a DAC improves sound quality and reduces distortion. Finally, a DAC makes for a more immersive sound experience.