I have a DX7S coming my way arriving next week (and a decent quality UL-certified €3.- USB cable to hopefully prevent the above problem).
And I have a perhaps somewhat silly question.
As I understand it the balanced internals of the DX7S feed one DAC chip with a left and right signal and another DAC chip with the same left and right signal with polarity inversed (or perhaps one DAC chip with the left channel twice, once polarity inversed and the other DAC chip with the right channel twice, once polarity inversed). This balanced signal made up out of 4 channels is kept throughout the op-amps to the balanced outputs.
Out of curiosity I was wondering how the unbalanced line and headphone outputs are made. Are these simply taking 2 of the 4 channels and discarding the other 2? Or are the out of phase channels phase inverted again and combined with the in phase channels so the 4 channels combine into two for the unbalanced outputs?
It looks to me that the two out of phase channels are probably not used for the unbalanced output as the balanced output has twice the voltage. Or am I missing something here?
This means that when using the unbalanced outputs one ES9038Q2M, two OPA1612, one TPA6129A2 and a whole lot of other components are basically wasted?
If so, are there any gains to be had besides the extra volume to turn the balanced outputs into unbalanced outside the DX7S? And if one wants to do this, what's a good way of doing so?
Edit: Call me crazy, I was able to cancel the DX7S before it shipped after finding a second hand Anedio D2 (ES9018 full chip not mobile) for about the same price
Comes with a host of measurements that exceed the DX7S and exactly the features I need.