Frequency response of the Fidelio L1, right channel, driven by 5-ohm (blue trace) and 75-ohm (green trace) output impedance, with results normalized at 1 kHz. Adding 70 ohms output impedance to the V-Can’s 5-ohm output impedance to simulate the effects of using a low-quality headphone amp boosts the bass slightly, by less than +2 dB at 20 Hz.
