A dense field of deep indigo felt dominates the surface of this large-scale work, its matte texture absorbing light in a way that seems to pull the viewer inward rather than reflect outward. Naama Tsabar, whose practice moves fluidly between sculpture, sound installation, and performance, here continues her ongoing investigation into the felt series by embedding an electric guitar pickup directly into the material. The pickup, nearly swallowed by the fabric, transforms this quietly monolithic object into a latent instrument, capable of amplifying the ambient vibrations of any space it inhabits. What reads at first as a minimal color-field composition gradually reveals itself as something far more charged, a surface with a nervous system. Tsabar's Work On Felt series occupies a compelling position at the intersection of visual art and music, and Variation 15 in dark blue carries the full weight of that conceptual ambition. The choice of felt is not incidental. Associated with acoustic dampening and the suppression of sound, the material stands in productive tension with the live pickup embedded within it, inverting the felt's usual role from silencer to conductor. The work is signed by the artist and was exhibited at Kunsthaus Baselland, situating it within a serious institutional context that reflects the critical attention Tsabar has received internationally over the past decade. For collectors, the work functions on multiple registers simultaneously. As a wall-based object it holds its own through sheer formal presence, the saturated blue and compressed texture demanding sustained looking. Yet its performative potential remains intact and available, making it a living acquisition rather than a static one. Tsabar's practice has been shown at major institutions across Europe and the United States, and this signed example from 2017 represents a confident, fully realized moment within one of her most significant ongoing bodies of work.