[size=x-small]V100 and V200 are not very similar in terms of their amplifiers,[/size]
[size=x-small]but they are quit close concerning their output voltage.
Both are best suited to drive high impedance cans like T1
As V181 is intended to operate best in balanced mode,[/size]
[size=x-small]it is compareable to V100 and 200.
In unbalanced mode the output voltage swing is only 50 % of the voltage swing of the balanced mode.
So - for my opinion - it is not as good suited of high impedance cans like V100 or V200.
From the sonic aspects V100 and V181 are quite similar.
Compared with V200, V181 gives more room or open sound in balanced mode.
V200 on the other hand seems to be more "musical".
So, if you want a balanced headphone amplifier for balanced headphones, V181 would be best choice.
If you want highest quality sound, V200 would be the best.
All our amps are totally neutral in sound an will not change anything coming from your source.
V181 is ALLWAYS equipped with 4-pin XLR and no USB input.[/size]
[size=x-small]The standard USB input 16/48 will cost 100 EUR,[/size]
[size=x-small]The 24/96 USB will cost 150 EUR but it is not ready in the moment.
We hope we can deliver in July.
But USB options are very easy to install afterwards without soldering, only pushing a connector in place and fixing 3 screws.[/size]