These are slim speakers in the literal sense: thin enough to surface-mount straight onto a wall with no recessed cavity, for rooms where cutting into drywall or masonry is not an option. XSCACE calls the range Slim Array, and it is the thinnest way to put full-range sound into a finished space. The Bonsai is the slimmest speaker in the range at 12mm deep, using XS-Flow™ waveguide engineering to control directivity from an enclosure that shallow. The Cane sits at 23mm, and the QuadCane scales the same approach into a 16-driver vertical array for larger rooms at 21mm. All three share the PowerDense Dynamics™ copper-silver voice coil that keeps output from compressing as volume climbs. Because an on-wall slim speaker needs no void behind it, this is usually the answer in a completed room, a rented property, or any building where the wall is concrete or blockwork rather than stud — and the 95dB sensitivity of the QuadCane means a slim profile costs nothing in output.