Got mine for a week during Canadian Vision sell.
Had really high hopes/expectations for these cans.
un-boxed it, used it, big disappointment in about 2 minutes.
at first i thought my normal turbine sounded twice as good.
What right?
PROBLEM 1:
The natural EQ of these coppers are just too "bullet" shaped, Way too much mid frequencies around 1KHz
and it actually hurts my ears when I listen to them above a certain listening level Un-EQed.
I am not a bass head, and i like high frequencies.
and guess what, with this bullet shaped tone came with copper,
I dont have enough bass because the mids are relatively way too much.
and I dont have enough highs because the mids are relatively way too much too.
so i am forced to EQed it with my custom "U" shape freq.
EQ preferences might be a very subjective area,
but i am comparing it to at least 4 other IEM including AKGs, Sonys, MEE, and even the normal Monster Turbine.
PROBLEM 2:
this copper of mine are with control talk.
the extra MIC ch means that this will have 3 stripes VS the normal 2 for stereo L and R
and the very annoying part comes when I connect that 3 Stripes to the 1/4 adapter and use it on anything like a external DAC/AMP.
it mixed my stereo into mono, unless i press the talk button.
tried 3 to 4 1/4 adapter and all assaulted the same mono mix-down.
some time later I managed to MANUALLY fix this by slightly unplug the 3 stripes from the adapter.
and then the mono mix-down go away.
might be a personal case, but it s really annoying.
now after two to three days of "U" shape EQed critical listening.
it started to sound like a $350 IEM.
the below are some of the reasons that stand out the most.
PROS 1:
First is the "Headrooms" are super big.
I personally find that headroom are the only characteristic that low-mid headphones DO NOT have.
and the Coppers has super noticeable big headroom compare to all my other IEMs that are less than $100.
this characteristic itself puts coppers in the mid-high range no doubt.
PROS 2:
Mid Bass is super detailed.
now even after my U shaped EQ settings.
The mid bass level are still a little too much for my personal liking.
but it is not even close to MUDDY.
I can clearly hear the separation of lower instruments like kick drum VS bass.
very good quality & characteristic here.
however here is my over all conclusion:
if you are expecting copper to have a flat frequency responds, avoid it.
The bullet shape EQ hurts my ear when i listen to music above a certain level.
and note that this level is not near my usual desire level.
so i have to listen to music at lower volumes.
personally i hate EQing for any reason,
but for me it is not usable if I don't EQ.
Am I the only one didn't like the bullet shape tone and have problems with the mono-mix down?