Originally Posted by aug_aug
I have a noob question...I am about to order a set of Etymotics ER4-Ps. Is a CMoy amp going to do anything at all, I'm going to listen primarily through an iRiver E10 mp3 player.
I realize the Ps are for portables, delivering more power, etc., but is a portable amp going to be overkill or will they sound better?
Thanks in advance for any input here.
Depending on which CMOY you are talking about. I'd suggest an 18V (2 9V batts) and OPA2134PA setup. ER-4P itself does not require external amplification to sound good. But they do improve subtly with extra juice from external amps. Since you are going the amp path, may as well switch to ER-4S (with a P>S adapter). ER-4S will benefit termendously with amplification. The idea is simple, more current = better sound reproduction, it's a proven sound science. And on top of that, I'd recommend that you amplify Line-Out instead of headphone out. I am not sure if iRiver E10 have Line Out
If you have dough to spare, allow me to urge you to buy a used Xin SuperMini-IV or a MiniBox-E+ for your Ety
better do it now and save your money on upgraditis which tend to follow once you hang around here long enough.....