Are EQ settings OK for Etymotic Er-4p ?

Do whatever sounds best. Dumb question, but are you sure you're getting a good seal?

I got this reponse from Etymotic:

"Please be advised that some of the earphones and/or earmuffs have larger diameter speakers than the ER-4. Bigger speakers are capable of higher outputs at lower frequencies. The ER-4 earphones, by design, have a flatter frequency response. That means without adding extra bass by using an equalizer or bass boost, the ER-4 may sound like it has less bass than other earphones. The other thing that is very important is the issue of sealing the ER-4 in the ear. It must seal in the canal like an earplug or the bass frequency response will be diminished. With some earphones, you can get away with not having a good seal and your earphones will sound o.k.; e.g. Grado 80 and your iPod earphones.

The ER-4P is capable of outputting more than 100 dB SPL at low frequencies, the other earphones are capable of greater low frequency output because the speakers are larger. The ER-4P has a flatter low frequency response compared to the other earphones mentioned. Doing a side-by-side comparison of all the earphones would result in the ER-4P sounding like it has less bass than the others. Extra bass can be added by adjusting the equalization or adding bass boost.

Lastly, based on the shape of one's ear, one may want to consider a musician's custom earmold for comfort and seal to replace the "standard" foamies and white flanged eartips. "