Cons: Limited acoustic. Small sound size. Treble quality and detail level are below average. Even the bass is not complete
i know you already saw all the threads, reviews, comments speaking about the sweetness and cheapness of this earphone (eartrash actually). i also know that there's a common talk about it's fakes, which makes you feel like if you can get the genuine one, it's going to be the perfect earphone of the stars... there's also a talk about it's "beryllium" that you don't even know what it means. i know all of that makes you wonder this item more and more...
i know you want all of this turn out to be true... you want a cheap earphone that beats the rest of them. but for this particular earphone, all i'm going to say is: just don't buy this. don't spend your bucks for nothing... the people you see in the forum threads (and review pages), acting like there's no better alternatives and it's price is actually $1 or something. for them, the world of budget earphones is collapsed and only piston 2's are left.
actually, if you buy that piston they talk about, you'll be left with a very small acoustic (acoustic = soundstage, soundfield, positioning, separations etc.) which means unrealistic sound reproduction and below average sound quality. even if you manage to live with this kind of bass and treble performance, you're inclined to feel something missing between the bass and treble, the most important part, mids are suffocated.
this earphone is actually nothing new, pretty much identical to brainwavz m4 (except some frequency balance differences) sounds like cheap earphones from big companies (like sennheiser cx or creative ep series) same compact design, same unrealistic acoustic reproduction, same below average performance which excels in nothing.
come on, offer me $300 per month just to use this "thing". i'll not accept. just for $300 every month i'm not going to sacrifice my entertainment that much. if you up your hand to $500 maybe we can get to somewhere but that's just a maybe... you see the problem ?
bought from penonaudio.
if you think piston 2 is good just because of it's price tag, please take a look at this list first. they're my favorites and they're the real thing. if current prices are different than this list, i say wait for a discount or just try to spend a little more:
audio-technica cks77, $16 on aliexpress.
brainwavz beta, $9 on amazon.
koss plug, $10 on amazon.
moxpad x6, $15 on aliexpress.
notes: beta is the best of brainwavz (not treble wise), do not let prices cloud your judgement. cks77 sounds exactly the same with brainwavz beta. koss plug needs extreme equalizer reductions to sound normal. moxpad is an alternative but only if plug or beta-cks77 is not the choice for some reason.