HansHolland
Active Member
Is there anything conceivable that could be done post amp to prevent this EMF energy from coming back into the output? Something akin to a one-way street?
It doesn't necessarily bother me at these levels, but it would be interesting to attempt and compare if a practical solution could be made available.
Ok, this is from a while ago. Sorry, but I just registered.
It is about the back-emf of headphones influencing the headphone amplifiers THD figures (for worse).
I use an IFI EarBuddy for using the volume control of my RME work closer to 0 dB.
The EarBuddy is an "expensive" resistive divider. Around 16 Ohm input resistor and a 2.7 Ohm output resistor.
I don't hear my RME having problems driving that load. Both the PHONES and the IEM output.
And I have a Beyerdynamic DT 150 (250 Ohm impedance) that also feels fine with the EarBuddy.
But seen from the DT 150 the back-emf is loaded by a 2.7 Ohm resistor in parallel with the 16 Ohm resistor (and the output resistance of the RME).
If I was current, then I would choose the 2.7 Ohm path.
I expect that the back-emf of headphones would have less impact on the performance of the headphone amp when using this kind of devices.
But the headphone amplifier must be able to drive the low load.
So, could reducing efficiency improve compatibility.