[harveywecpk4]

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I agree - for half the cost of the ER4P, you can buy the HF5 and get almost the same sound quality, identical isolation and better build.
 
Quote:

Etymotic is pretty much the unchallenged king when it comes to noise attenuation. But that doesn't mean you must get the er4p. As anaxilus already mentioned, there is the ety hf5, which the company rates as being equally isolating.

Thanks for your effort! This is what I'm looking for, It's comprehensive.

 

[alphaphoenix]

Even cheaper, depending on what IEM you may already own, getting the triple flanges tips may give you the same isolation as the ER4 series and equivalent if you can tolerate that sort of deep insertion, which I for one cannot.