6-driver balanced armature with passive 3-way crossover, acrylic body with Flex Canal (to ensure maximum comfort and sound quality, the body can also be re-molded if necessary), dual bore, MMCX connector type, 118 dB @ 1mW sensitivity, 8 Hz - 20 kHz freq. response, 46 Ohms nominal impedance, 25 dB passive noise attenuation
“ Disclaimer I bought these about 3 years ago, used them a lot and got to "know" them well. The (sort of a) good thing is: They still perform as good as they did when I first tried them on. But that was not too good. Back then I felt disenchanted: they somehow sounded unimpressive, which left me confused. I mean, I based my decision to buy the most expensive earphones I had ever owned solely...” --Checkbox G
“To keep it short..try him with a cowon d2., another neutral sounding source..u will be surprised how it sounds” --hifimanrookie
“ I personally prefer the sound of the "Westone" series to the "UM" products. I use my IEM's for listening to pre-recorded music. The sound of the UM series is very good, but the WESTONE 4R is the closest I have come to the sound of my FOCAL speakers. While the sound was pleasing when using the COMPLY foam tips, the UM56 custom tips took everything up a level. ...” --psych_major
“Review of the Westone UMPro50 + iFi iDSD Nano Pairing Intro I hereby declare that the review as it is , is honest and unbiased . In Ear Monitor Westone UM Pro 50 Signature Series [S$999] - 5 Balanced Armature - 3 Way Crossover - Westone’s Stock Cables & Tips - Designed and Made in USA Digital Analogue Converter AMR iFi iDSD Nano [S$250] - Burr Brown Texas Instrument...” --potatoe94
Adventure Series is the culmination of two decades of experience with audio and in-ear monitors. Designed for active users, ADV creates a new category of cross-over earphones that can be enjoyed in any environment. Westone's Adventure Series offers an Active Fit System with Up and Over cable routing and patented Star Tips to ensure superior fit, comfort, and retention. The Adventure Series...