Westone triple balanced armature driver 3-way passive crossover custom. 1 High, 1 Mid, and 1 Low drivers.
“I bought these as an upgrade from the W3, which while extremely fun, I soon became disappointed in, due to mid bass bleed into the midrange. This caused vocals to become too chesty and distortion rock guitar notes too rounded instead of hard edged. Enter the W4. Fit and Isolation: Westone 4 is extremely comfortable. I love their size and weight. They only...” --shotgunshane
UM Pro 30 High performance Dual Driver in-ear Headphone The ultimate in-ear headphone, the UM Pro 30, stands next to none. Boasting an unmatched sound signature and tuned for performing artists, the UM Pro 30 challenges the conventions of other in-ear headphones and is backed by 50+ years of experience with in-ear applications. With a three-way crossover that's matched to individual low,...
“ 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
“ This a relatively solid case, well cushioned, good sized and very functional. Given that - I am at a complete loss as to why the closure is so poorly made. I bought 2 of these and within 60 days BOTH case latches developed a lateral crack running along the clasp left to right - in one instance it broke off completely. I had bought them from Sweetwater and they replaced both of them...” --Lifter59
Superior sound isolation for stage or studio Triple-driver design User-replaceable cable
Westone has been at the forefront of in-ear musicians' monitoring technology since the early 1990s, developing both custom and universal-fit products. From professional in-ear monitors to personal listening earbuds, they are designed to help you accurately hear what matters most to you: your music.
“ http://www.head-fi.org/forum/thread/524282/review-unique-melody-miracle-6-driver-custom-iem That's my full review. In summary: These are simply the best customs, and possibly the best headphones of any type, that I have ever heard. I prefer it to my JH13pro due to it's better deep bass response and more natural tone. These sound great paired with a simple portable...” --project86
“ Westone ES5 Disclaimer: This review is just a reflection of my opinions and experience. Specifications: Sensitivity: 120 dB SPL/mW Frequency response: 8 Hz - 20 kHz Impedance: 20 ohm Speaker Technology: Five balanced armature drivers with a passive three-way crossover Features : Replaceable cable, one year parts and labor warranty on internal components, 25 dB...” --Tronz
“This is the first review i am going to do on head fi . Firstly i am just a junior teenage audiophile so ya my review might be slightly inaccurate , just slightly. These Unique Melody mages have 4 balanced armature drivers in them, 2 lows 1 high and 1 mid. Now i will start of with build quality. Build quality: The build quality is superb i can say! When i compared it with my friend's jh 16...” --JuzModa