I checked both the E10K and the Q1 MK 2 and it seems that they are only USB powered.
Q1 MkII is battery powered and has a little bit more power at low impedance if you use it in balanced drive.
Do you think they are powerful enough for video/movies? This is my main concern right now since when i watch videos in my computer i strain to hear the voice of the actors and the effects have no impact
The material isn't really what you need that power for, even if it was recorded with lower gain, in which case then an amplifier's gain has more bearing on that than outright power. What you need the power for is whether you're adequately driving a headphone (or speaker at a given distance, as the case may be), where the primary determinant is sensitivity (how much power it needs to hit a theoretical 120dB, while you realistically listen at roughly 85dB at 1000hz average) and impedance (amplifier output can vary depending on the load impedance and circuit design). And then there's distortion and noise - lots of power isn't going to do you a lot of good if the signal sounds like crap, even if it gets to the desired output level without clipping the signal.
If we're just talking about power, then either would have enough
if you were using something like Philips Fidelio X2, HiFiMan HE400
S, or Grado RS2e. Distortion and noise are well controlled for the money, but of course these aren't Violectrics.
The other thing that can affect that is the headphones themselves. Assuming you're not necessarily getting enough distortion to totally reshape the response curve on your headphones, ie, you're hearing the headphones mostly as it is just at lower overall volume, an amplifier isn't going to drastically change that unless you're running out of power for dynamic peaks. So basically just don't expect an amp to just magically, literally, change the overall sound signature of a headphone. Depending on what that is you might be better served by getting a different headphone and the associated electronics later on than spend a little now and not get the results you want nor have a really good amp for whatever you decide to upgrade to later.
I can stretch my budget to USD $200.
Perhaps for this particular need of mine, i would prioritize loudness over sound quality since main focus would be for videos.
Modi2 and Magni3.
