Wow. What a fantastic pair of headphones.   I've been using these for a few days now. I found the treble a little harsh on some songs initially, but after about 20 hours of listening, it became a lot more relaxed. I'd really urge listeners to persevere past this out-of-the-box harshness...

I've been searching for a few months for a good IEM and have settled on the ER-4P. In the process, I've tried (in chronological order) the Klipsch Image S4i, Monster Turbine, Thinksound TS02, Hifiman RE0, Hifiman RE-262, Monster Turbine Pro Copper, Etymotic HF3 and the Westone 4. My source is an...