Originally Posted by SmOgER
Why waste money on headphone then to begin with?
it doesn't matter if there's "enough volume", 300Ohm headphones simply aren't made to be powered by casual smartphones like M9 without external AMP nor will they'll even come close to their potential.
I'm asking this question too cause , some headfiers asked about the ability of driving 250 ohms + headphones from the headphone out. AFAIK, only a couple of them have this ability but for sure not the way it should.
a. Meizu Pro 5
b. Meizu MX Pro 4
c. Htc One M9
d. LG V10
Even if these 4 devices can power hard-to-drive cans, it won't be at full capacity to please the most demanding audiophiles, but at least if they have a proper desktop setup, then the headphones can be used occasionally on their smartphones as well. If they don't have a setup, it will be useless investing in 100 ohms + headphones.
I remember having some issues to drive my Koss Portapro (60 ohms) through usual mp3 players, a decade ago (2003-2006). It was painful to a point that I had to invest in flagship ipod devices and Nokia music editions, which were the only mobile devices compatible with cans of up to 100 ohms.
A smartphone is not meant to replace any dedicated dap/dac or amp. It can only be used as a backup on the go, the same reflexion applies regarding the camera modules. An all-in-one device does not focus on any specific function, we can only expect decent performances without being too demanding.Edited by thepooh - 2/13/16 at 8:49pm