"Best macthing with ipod"4.5 starson by Jack.P.Song
Pros: Great sound quality, second only to ER4 series
Cons: some hard to put it in
Summary: At first, Cnet Video's product is not 'ER6i'. What Brian Reviewed is 'ER6'.
ER6i is diffrent from ER6. ER6i is designed for the Best Matching with ipod. Etymotic told that they researched with Apple Company. And ER6i has enhanced bass sound, Because ER6 has 'not good bass' sound.
So if you want to match your ipod to Etymotic Earphones you should buy ER6i not ER6.
Second, ER6i has Great sound quality, but the clarity is not better than ER6 and ER4 series. As Etymotic enhanced ER6i's Bass sound, they deteriorated the clarity of the ER6i(of course relatively. ER6i's Clarity is better than any other Open typed Earphones, you can still astonished with ER6i's clarity.).
Anyway ER4P has the greatest clarity and pretty good bass sound. but its price maybe twice ER6i.
So if you want greatest clarity and pretty good bass sound, Buy ER4P.
And if you want good clarity and pretty good bass sound, Buy ER6i(i usually use ipod nano+er6i Because they sometimes show me 'synergy effected Sound' lol)
And if you want greatest clarity and just plain bass sound, Buy ER6
Because I'm Korean and live in Seoul, my English isn't so good. But I wished to help someone who wants to buy Etymotic earphones because i have used all those ER6, ER6i, ER4P.
Thank you, Have a nice day-