The Pioneer CS-66 is a classic loudspeaker model that was part of the CS series, known for its dynamic sound reproduction and robust build quality. It features a three-way speaker design that consists of a 12-inch woofer, a 5-inch cone midrange driver, and a 2-inch dome tweeter, allowing it to produce a wide frequency range with high clarity. The cabinet is often made of high-quality wood veneer, contributing to both aesthetics and sound resonance. The CS-66 is designed for a nominal impedance of 8 ohms and can handle a power input of approximately 50 watts RMS. Users often appreciated its ability to deliver deep bass and detailed highs, making it suitable for various music genres. The speaker includes adjustable level controls for midrange and treble frequencies, giving users the ability to tailor the sound to their preferences. The CS-66 is typically paired with a compatible amplifier and is suitable for either home audio setups or more extensive stereo systems.