The IT01s has moderate amount of sub-bass quantity and it is extended well. The sub-bass reproduction provides a nice rumble. Bass decay is quick and the agility elevates the engagement level. Bass texture rendered in a smooth manner. The mid-bass has little quantity and the slam is expressed incisively. Each bass note is delivered in a punchy manner which creates an exciting listen.
The midrange of the IT01s is expressed in a clear manner with good transparency level. The lower midrange has moderate quantity and male vocals are expressed without sounding dry. The upper midrange has slight forwardness and offers some intimacy for female vocals to be expressed well. The midrange has a good balance of body and details which provides a nice vocals listen.
The treble is extended well and it showcases its finesse with a controlled presentation. There is no sibilance and harshness. The treble has moderate body and it is articulated precisely. The amount of air rendered is good and contributes to a moderately airy feeling. There is well-defined crisp with sparkle to liven up the top end without any signs of aggression.
The IT01s excels in its soundstage with a natural expansion. There is an open feeling without feeling any congestion. The width magnitude is great to improve the overall positioning of vocals and instruments. There is nice depth with a good amount of space rendered.