The Pioneer QX-646 is a quadraphonic receiver that was part of the company's audio offerings in the 1970s. It features a power output of 25 watts per channel across four channels (quad output). The receiver has various settings allowing users to adjust sound quality and balance according to their taste. It includes built-in AM/FM tuners, along with multiple input options for connecting turntables, cassette decks, and other audio sources. The QX-646 comes with multiple speaker outputs which allow for a more immersive listening experience, and it is equipped with tone controls to customize treble and bass settings. Additionally, it includes a scope meter for visual feedback on audio levels and performance. The design is typical of the period, featuring chrome knobs and a sleek layout, enhancing both functionality and aesthetic appeal. Overall, it's a representation of the evolution of audio technology in its time, catering to enthusiasts looking for multi-channel sound experiences.
