Klaw is unable to regain his original organic form. He has a susceptibility to vibranium, which can cause his mass/energy form to temporarily collapse. He is also subject to temporary mild insanity when forced to exist as sonic energy without humanoid form for long periods of time. As a result of his transformation, Klaw was at first unable to exist outside a medium that allows the propagation of sound waves (i.e. in a vacuum) without the technological improvements made to his sonic converter by AIM. But after being reconstituted by A.I.M. his "solid sound" body has different properties than normal sound waves and is not affected by a vacuum. It was demonstrated that in this form that Klaw could also generate and direct sonic attacks through physical objects without needing his emitter by merely touching the material.