SB-G90 is a Grand Class floorstanding loudspeaker employing a Point Sound Source system with a coaxial 2‑way Phase Precision Driver and a 16 cm long‑stroke woofer. The Balanced Driver Mounting Architecture (BDMA) minimizes enclosure and driver vibrations to preserve imaging and dynamic accuracy. A high‑quality network circuit supports accurate signal transfer, delivering transparent detail and coherent tonal balance across the listening spectrum.