In-ears for Stage or Studio Many here at Sweetwater know that you can never underestimate the power of clear and powerful in-ears. Xvive understands this notion, that’s why they had top IEM engineers design the T9 in-ear monitors. These earphones deliver high-quality sound that was previously only available to pro-level musicians. These in-ears dole out the crystal-clear audio courtesy of two balanced-armature Knowles drivers and custom-tuned micro tweeters. As for that crystal-clear audio, two balanced-armature Knowles drivers and custom-tuned micro tweeters ensure the high frequencies sound faithfully reproduced and the bass frequencies sound large and powerful.