Frequency Response: FiiO E17 Alpen and E12 Mont Blanc
July 09, 2013
The Bode plots below show frequency response curves from 5 Hz to 1 MHz for two FiiO headphone amplifiers. The measurements were performed under
identical test conditions for both amplifiers with a line-in signal level of 0.50 Vpeak. For the E17 Alpen, the gain range was set
at 6dB and the volume adjusted to the maximum value of 60 providing a 1.20Vpeak output. For the E12 Mont Blanc, the gain range was set at
16 dB and the level adjusted to obtain 1.20Vpeak output. 33 ohm load resistors were used to load the headphone outputs. For the E12 Mont Blanc,
the two response curves demonstrate the effect of enabling the Bass boost switch.
A Digilent Analog Discovery dual-channel digital oscilloscope with Bode plot software was used to obtain the curves:
