“ So after a day of somewhat abusive run in (free and impatient) and tip rolling, I can say these easily play in a realm at or above their $100 price point. The stock tips are fine and Grado tips also work well but try a few doubles on them all the way to the base and you may get really great results. The stock tips are short and I prefer those up near the tip, the Grado/Orto tips...” --goodvibes
“The HY3 is a three-way, three-driver hybrid custom in-ear monitor from Sweden-based Cosmic Ears. It utilizes a dynamic driver for the bass and twin balanced armature drivers for the midrange and treble, which used to be a very rare configuration, although hybrids have increased in popularity over the past year. The bass unit looks to be around 8mm in diameter and has its own sound bore. The two...” --blueangel2323
The HY2 combines a dynamic driver for lows and a balanced armature for the mids and highs. This dynamic driver also delivers an increased soundstage. The HY2 is a great sounding monitor for those looking for something a little different by combing the 2 driver technologies. Twin hybrid – 1 for lows, 1 for mids and highs Full sized medical grade hard acrylic shell Various...
The Pure model is the fantastic entry model to our range of customs yet it still has the benefits of custom in ear monitor. The Pure fits perfectly to your ears, these high-quality headphones deliver a rich sound that off-the-shelf earbuds simply cannot match.
The Flex model is designed to allow you to configure your earphones enabling you to build the perfect listening companion.
“Copied from: http://www.head-fi.org/t/686039/cosmic-ears-ba4f-review I'm finding it hard to rate these, for the price I would give them 5 stars on every department. But I'd rather rate them, referenced with the idea of what the very best cIEM could be. The BA4f with the Ice Blue color Short History Before I started my journey into the cIEM...” --Marleybob217
“These headphones have powerful bass (comes with a lot of ommph) which is good and lets honest if your interested in these earphones main reason will be for the bass For listening to music such as Pop and dubstep these are very good as the beat/bass just comes alive. For rock I found them good but not excellent. For classical and new age music its OK I found them a...” --butter30
“Foreword: I'm a production manager, but mainly focus on live sound engineering and lighting. I install and tune P.A equipment, and mix live acts in: - live venues, - concert halls, - bars, and - nightclubs. I've taken a huge liking to headphones - IEMs in particular. I like the idea of having my own personal PA system that I can take with me anywhere. With Rockbox being in such...” --White Lotus
“ I am always on the search for great in-ear headphones, however I always seem to find the same problem, because they are in ear, they tend to have very small drivers, meaning there is never much bass, and in most cases the highs are also messed up in an effort to get more bass! So I am always on the lookout for in-ear headphones that have good bass, yet have a nice flat frequency...” --MyConnor5Review
“Introducing HiSound Audio's Crystal IEMs After reviewing HSA's E212 and PAA-1Pro recently, Jack approached me and asked if I'd like a review sample of the Crystal (IEM) and Living (Earbuds). I jumped at the chance, and after paying for the freight - they duly arrived a couple of weeks ago. I’ve listed price at the RRP of ~ USD $69 – this is not what I paid for them...” --Brooko