At 50 ohm impedance and 108 sensitivity, we'd only need like 1.5mW of power to get over 110 SPL. The E6 can output ~1.2-1.3v, which would result in 31.25 mW of power.
At 50 ohm impedance and 108 sensitivity, we'd only need like 1.5mW of power to get over 110 SPL. The E6 can output ~1.2-1.3v, which would result in 31.25 mW of power.
The sensitivity of 108 dB is for 1 Vrms, rather than 1 mW, but the 1.2-1.3V is probably enough anyway if you do not want very loud sound. For the HD598, it is important however that the source should have a low output resistance, since the headphones have a large resonant peak around 90 Hz (reaching almost 300 Ohm) in the impedance curve.
The sensitivity of 108 dB is for 1 Vrms, rather than 1 mW, but the 1.2-1.3V is probably enough anyway if you do not want very loud sound. For the HD598, it is important however that the source should have a low output resistance, since the headphones have a large resonant peak around 90 Hz (reaching almost 300 Ohm) in the impedance curve.
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