Design and features:The Spirit X2 has integrated microphones and volume, music player, and call connect/disconnect controls for paired Bluetooth devices. Additional features include a bass boost EQ setting, support for unspecified digital voice assistants when used with Bluetooth devices that have those features, and manufacturer claimed dust and water resistance. This model comes with five pairs of ear pieces in various sizes, three pairs of earbowl supports in various sizes, a USB charging cable, and a charging cradle/recharger battery/carrying case with a built-in rechargeable battery that the manufacturer claims can be used to recharge the earphone batteries approximately 3 times between its own charges.
Sound quality: We found the Spirit x2 delivers sound quality that falls in the very good range - it reproduces music and voice very well although it does have some noticeable sonic quirks. With the Bass Up feature set to "Normal" the bass (as in bass drums, bass guitars, stand-up bass, etc.) goes deep, but is prominent and boomy, and has excessive impact. The midrange (voices, guitars, horns, etc.) is fairly even, but somewhat grainy, a bit hazy, and somewhat overwhelmed by the bass. The treble (cymbals, the upper range of violins, etc.) is extended but is somewhat prominent and a bit smeared (sounds that should have a delicate shimmer sound blurred). The sound also has a good sense of liveliness and is somewhat open--sound-wise it almost seems like you don't have anything plugging up your ears. It does a good job of recovering room ambience (the sense of the acoustic space in which the audio program that's being listened to was recorded). Mixed character - warm bass with a neutral midrange and treble. The overall sound can be summerized as very bassy and somewhat grainy. The Bass Up feature makes the bass even more prominent and boomy.
Comfort: As typical of in-ear models they produce a sense of pressure in the ear canal opening that might be uncomfortable for some. Users with small, medium and large sized ear bowls will probably find that this model fits and stays in place with no problems and are very stable even during vigorous head movement, but it may take some fumbling to get them in place.
