Sony unveiled their all new Balanced Armature (BA) in-ear headphone series. With the new micro-size driver that is a quarter of the size of a conventional 13.5mm dynamic driver, the BA headphones offer incredible sound resolution.

Featuring the newly developed, micro-sized and fully tuned BA driver units, the XBA-1, XBA-2, XBA-3 and XBA-4 headphones include one (full range), two (full range + woofer), three (full range + woofer + tweeter), and four (full range + woofer + tweeter + super woofer) BA driver units, respectively. The ability to combine woofer and tweeter drivers in addition to the standard full-range driver is appealing to music lovers seeking an even more impressive listening experience, with bass and treble frequency ranges reproduced in even higher-fidelity.

Enclosed in a newly developed double-layered housing, the high-quality magnesium inner housing for the XBA-2, XBA-3 and the XBA-4 headphones, along with the Liquid Crystal Polymer housing of the XBA-1 model, holds the BA driver units rigidly in place for smooth sound response. The micro-sized BA drivers incorporate a noise blocking structure that prevents sound from leaking in or out, while also providing the ultimate in-ear fit and comfort.

For iPod, iPhone and iPad users, XBA-1iP through XBA-4iP models, come with Apple 3-button control and microphone.

The BA in-ear headphones will have following pricing: XBA-1, $79.99; XBA-2, $199.99; XBA-3, 279.99; XBA-4, $349.99; XBA-1ip, $99.99; XBA-2ip, $219.99; XBA-3ip, $299.99; XBA-4ip, $369.99. And the headphones are available for pre-order
on Amazon.