Hi all! I have been lurking for a while.
I have purchased the Arya last year (non-stealth) and was running it with an Amp/DAC device (SMSL M500). I recently ordered a separate Amp (Topping A90) on amazon to test out because I have been reading so many different things on what to pair with the Arya.
To me it seems like the sound has improved noticeably. Especially bass has a lot more kick and the sound overall seems to be more energetic. Now I am unsure whether I am just tricking myself. When people talk about the fact that headphones "need power" what does that actually mean? Because the Amp/DAC was driving the headphone to very high volumes already. Yet I think that the sound sounds better with the separate amp.
I am a bit lost because you read so much information where you don't really know what to believe (battery powered speaker cables/USB noise isolator etc..).
Are there any "scientific" explanations to my observation?
Sorry for the newbie question.
That is a super weak amp compared to the A90, so you are most likely actually hearing an improvement. A90 does 1.4a so you are covered for any hard to drive planar that exist right now, as planars are typically low impedance and use more current. Here is a power guide by solderdude on the other form(asr) to sorta rack your brain around it. I think a tell tale sign of being under powered is shouty highs and uncontrolled bass. Once meet and exceed your power requirements for headroom there is no "scaling", it simply a matter of people listening to different amps and preference.
If you don't have any ground issues or RF interference then you don't need any "noise" solutions and cables objectively do not make a difference.
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