The Sansui S-900G is a three-way loudspeaker that was manufactured between 1985 and 1988. With dimensions of 330 mm in width, 600 mm in height, and 264 mm in depth, it weighs 8.9 kg. The loudspeaker features a 250 mm woofer, a 100 mm midrange driver, and a 50 mm tweeter, allowing for a frequency response that ranges from 30 Hz to 25,000 Hz. The power handling is rated at 40 W nominally and 80 W for music. Its impedance is 8 Ohm, and it has transitional frequency ranges of 2,500 Hz and 8,000 Hz. The speaker is known for its rear bass vent, which enhances the low-end response. The original price was approximately 900 DM. Various modifications and upgrades can be applied to improve its performance, reflecting a level of engagement from D.I.Y. enthusiasts.