Great for workout, stays in ear, cancels out noise, lightweight, and excellent sound quality.

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These things are great. The detail is great. You can pick out any instrument. The highs and the base are excellent as well. The foam plugs are very comfortable you can ware them all day if you want and they block out most noises. I am very satisfied with these earbuds. I cannot find anything negative to say about them. For the price...unbeatable. Don

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There's plenty of reviews on epinions and cnet to decide if the ER-4Ps are for you. To summarize, the clarity and isolation they provide will impress, and the self-proclaimed "live music" dynamics response just might be true. But for someone trying to get prevalent bass out of these with an ipod, you will have to be very clever, setting your EQ presets, volume levels and position of the phones themselves in your ears, all taylored to your kind of music. All while trying to avoid going deaf from the high frequencies. It IS possible to get good bass and tamed treble though! Here's a hint for ipod users: The "Small Speakers" EQ setting and a little extra volume will take you far! Also be careful removing and replacing silicone or foam flanges. You can pull the little filters out partially, and this will make them sound like they suddenly lost all of their volume. Pressing them against a flat surface with the flanges off will fix this. Overall, for use with an ipod, it will take some doing, but are well worth the price and the effort to get them sounding good.

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Let me join the choir in singing the praises of this excellent set of headphones. Every review I read prior to purchase described in detail the excellent audio quality, reponsiveness, output, range and fidelity provided by this set, and I am here to agree with that assessment. The sound quality is superb, with perfectly clear highs, mids and lows. Add to this the noise cancellation inherent in the design and you are treated to an ocean of sound without any outside interference. The only thing missing is an equalizer to allow more control, but listening to cd quality recordings is astounding; you are treated to the closest representation of live-quality music. I use this set with my Ipod Shuffle. I recommend these earphones wholeheartedly.

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Best of the Best Previous to purchasing the Etymotic Research Er4p High Fidelity Earphone I was sceptical that any earbud could compete with my HD650 headset. My problem with headphones, however, was that they weren't portable enough and somewhat uncomfortable when sitting on my deck soaking up the rays. I decided I needed earbuds and researched the web for 50 hours to find the BEST earbuds. I set the Er4P as the gold standard without ever testing them. Much to my surprise, the Er4P was superb and a close second to the HD650. They are very comfortable and the sound quality, especially the enhanced bass, was excellent. I highly recommend the Er4P for anyone looking for a complement to their iPods. It's a winner for the person looking for the latest and greatest sound experience. It is well worth the money, despite it's relatively high price. Go for it--you won't be sorry. [...]

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