deafdoorknob
1000+ Head-Fier
I've posted this before, but adding a 20-ohm impedance adapter to raise the input impedance of the IEMatch fixes the problem of it making the Andromedas sound thin- and dead-sounding out of sources with low output impedances.
Throw in a 10 cm extension cable to protect the adapter head from bending, and the combination sounds fantastic even out of a cheap FiiO Q1, which is normally a garden hose that spews hiss, with negligible loss of detail or dynamics to my ears. Frankly, I'd almost call it too revealing, as I am now painfully aware of the destructive effects of poor music mastering on audio quality.
I'd be hesistant to rely on finding a clean source to avoid hiss, as all too many of the "noise-free sources with black backgrounds" that Andromeda owners recommend aren't, including the iPhone.
it's more a give and take, if the hiss is unacceptable on the iphone to you you are truly blessed batman! or cursed... all good mate.