The X3II has moderate sub-bass quantity and the extension is good. The sub-bass reproduction is expressed with cleanliness and impact is brought out well without being too aggressive. Bass decay is rather quick and the agility contributes to the engagement level. The bass texture is moderately smooth. The mid-bass has fair quantity and the punch is presented in a lighter approach. Each bass note is articulated well with definition.
The midrange on the X3II takes on a laid-back presentation and vocals are expressed in a smoother manner. The transparency level is moderate. The lower midrange provides sufficient body for the expression of male vocals to prevent any signs of them sounding hollow. The upper midrange has moderate emphasis and female vocals are presented in a mellow approach. The midrange is controlled and relaxing to listen to.
The treble is extended well and there is an appealing listen. There is no sibilance and harshness. The treble has moderate body and the articulation is precise. The amount of air rendered is good and it provides an airy feeling. The crisp is defined and there is some sparkle. The treble expression is detailed and smooth.
The X3II has a natural expansion in its soundstage. The width magnitude is great and it aids in the positioning of vocals and instruments. The depth provides an effective amount of space.