Summary: I have heard some say that the bass response is overwhelming. I think they may have had their EQ settings set to something other than flat. EQ settings included with many portable devices are often misused.
Pros: Comfortable, Compact, Durable, Good Bass, Lightweight, Rich Sound, Set your EQ to flat
Summary: I found these Headphones while looking for a replacement for my over the ear headphones. My over the ear headphones are great, but they don't work well if I'm working out or cutting the grass. I was getting sick of other headphones that would fall out of my ears, not block outside noise, and sound flat compared to over the ear headphones. So I did what any audiophile would do and looked to higher end speaker companies to see what solutions might be available.
Summary: As a professional sound technician in the motion picture industry, I need a product that sounds good, is not cumbersome and is fairly indestructible. The Custom-3 In-Ear Stereo Headphones by Klipsch Audio fit the bill.
Summary: I own other products from Etymotic and Shure and these Klipsch earphones are the best yet. I've never been happy with the comfort of in-ear and have been able to wear these for hours without any discomfort.
Pros: Extremely comfortable, High Quality, Outstanding sound
Summary: I have to agree that these are not very easy to fit. I have come from Shure E2c, Shure E3c and UE pro.5s which were a lot easier to fit and keep fitted. However, once you get a good seal, the music quality is excellent. Just need to re-rip my collection now to a higher spec to get the most of these IEMs.
Pros: Sound quality Comfort once fitted Sound isolation
Cons: Initial fitting + further trial and error each time to get the proper seal.
Summary: I already had many earphones, most of them dynamic. Some of them give very good sound quality, like Hifiman RE0 or Sennheiser IE8, but I was willing to hear a good balanced armature set. In the past I heard some single armature phones, as Sound Magic PL-50 and S-Jays that were not bad, but not the quality level I was searching for.