The Pioneer CS-100 is a speaker model produced by Pioneer during the late 1970s to early 1980s. It features a two-way speaker design, facilitating a balance of bass and treble frequencies. The CS-100 is specifically noted for its acoustic suspension design, which helps to deliver clear sound reproduction and minimizes distortion. It typically includes a 12-inch woofer, which provides ample low-end response, and a 5-inch midrange driver, allowing for detailed mid frequencies. The high-frequency range is managed by a dome tweeter, which aids in the clarity of vocals and high notes. The cabinet design is typically a wooden enclosure, which contributes to the overall sound quality and aesthetics. The CS-100 was compatible with a wide range of audio equipment, making it versatile for various listening setups. Overall, this model is appreciated by audiophiles for its sound quality and design features.