Suyama FitEar, Japan's foremost custom IEM maker, has come out with a universal fit version of their flagship monitor, the MH334. As denoted by FitEar's naming scheme, it's a three-way, three-receiver, four-driver earpiece, denoted to be 'Mastering Grade' as it was tuned by recording engineer Mitsuharu Harada. As the TO GO! version of the MH334, the TO GO! 334 sports a precision-machined titanium sound tube directly connected to the treble driver, and a proprietary exit nozzle that provides separate pathways for the mid/low and low frequency drivers. Though not many people outside of Japan have FitEar's products, they have been very well received. FitEar is believed to provide some of the best and most robust build quality for acrylic-shelled earphones on the planet, as well as top-notch, quality sound. For people living in Japan, the FitEar TO GO! 334 retails for 105,000¥. For overseas customers, purchase options are limited, but FitEar now has a network of authorized overseas retailers: http://fitear.jp/music/support/dealer.html Spoiler: More%20Pictures The universalized body of the TO GO! 334 The TO GO! 334 comes with a soft pouch as well as a hard Pelican case for protection Size comparison of the TO GO! 334 against a custom version of the MH334 Clear shell version of the TO GO! 334, showing the titanium treble sound tube as well as the midrange and bass drivers surrounding it In early 2013, the FitEar TO GO! 334 (and all other universal-fit models from Fitear) underwent a build revision for improved durability. For the list of build changes, see here: http://www.head-fi.org/t/597146/fitear-to-go-334-suyamas-custom-iem-made-universal/2010#post_9126690 Sound signature remains unchanged. In July 2012, FitEar also introduced a second model to the TO GO! universal line with the TO GO! 111. It has since been renamed the FitEar F111 (more discussion here: http://www.head-fi.org/t/619034/fitear-to-go-111-appreciation-discussion-and-reviews-thread). Sporting a lower profile body and an integrated titanium horn bore, the F111 is voiced similarly to the venerable Etymotic ER4S. With a Japanese retail price of 42,800¥, the TO GO! 111 is less expensive than the TO GO! 334. Following the runaway success of both the TO GO! 334 and the F111, Suyama proceeded to debut the dual-driver, horn-equipped Parterre (more discussion here: http://www.head-fi.org/t/662182/fitear-parterre-appreciation-thread), which prompted a limited release white version, the Parterre Blanc, and now the black and white Mélomane, which is tuned differently from the Parterre. FitEar is poised to release more universal-fit models in the future.