Hi all,
I'm busy putting together a dummy load for testing headphone amplifiers. The necessary resistor values are straightforward enough, but I'd like to add some reactive loads that the headphones themselves as well as their cabling would present.
For capacitance, I'm thinking selectable 100pF, 220pF, 470pF, 1nF , 2.2nF and 4.7nF should cover things. Any thoughts here?
Inductance I'm less sure of - what sort of values would headphones likely possess?
I'm busy putting together a dummy load for testing headphone amplifiers. The necessary resistor values are straightforward enough, but I'd like to add some reactive loads that the headphones themselves as well as their cabling would present.
For capacitance, I'm thinking selectable 100pF, 220pF, 470pF, 1nF , 2.2nF and 4.7nF should cover things. Any thoughts here?
Inductance I'm less sure of - what sort of values would headphones likely possess?
For high frq, an inductor in series with the resistor should provide a rising impedance slope, although it probably won't be exact. But for the low frq resonance, you would need to provide a parallel LCR in series with that, and those values can be quite large.
For my DT-880 headphones I guesstimated:
250 ohm + 1mH + (20uF || 200mH || 40ohm)
For my DT-880 headphones I guesstimated:
250 ohm + 1mH + (20uF || 200mH || 40ohm)