Apologies, that was a poorly put question there now that I have reread it.
I have seen Amir and other reviewers casually mention/touch upon amplification power and the effects it has on bass and dynamic passages on tracks. I am trying to wrap my head around what is
really required in regards to amplification and headroom for normal headphones ranging from 32 to 300Ω with a sensitivity ~100 dB/mW... so not talking about difficult to drive HE-6s / HE-560s nor super sensitive Andromedas.
Case in point. Take the middle of the road headphone the Senn HD600 and power it by one of the following AIO DAC+HPA devices... would the Meizu's ~10mW handle the most difficult bass parts and ~20-25dB peaks of a dynamic track as well as the DX7 Pro providing ~54mW? At 1.748 Vrms would the bass be slightly anemic with the Meizu compared to the Aune or DX7 Pro?
My lean is toward the objective rather than the subjective so I am interested more in the audio science and math
.
Meizu HiFiPro
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Aune X1S 2020
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Topping DX7 Pro
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By the way, the two (2) cans in my signature that you mentioned our custom made earbuds from Singapore and Thailand. The Kryptonites @ 150Ω have a sensitivity of ~95 dB/mW and the Blurs @ 300Ω have a sensitivity of ~105 dB/mW. The rest of my earbud collection ranges from 16Ω to 600Ω with a sensitivity ranging from ~93 up to ~120 dB/mW.