The Vintage Pioneer QD-240 CD-4 Four Channel Demodulator Audio Processor is a rare and sought-after piece of vintage audio equipment. Made in Japan by Pioneer, this demodulator is designed to enhance the audio quality of CD-4 discs by converting the quadrascopic audio into two channels for a more immersive listening experience. With its mint, no signs of use (Mint) condition, this audio processor is sure to be a valuable addition to any vintage audio enthusiast’s collection. Comes with Original Box and packing, RCA Cable, Operators Manual, Repair Schematic, Test Record, Tag, Brochure. “ITEM WILL BE VERY WELL PACKAGED AND DOUBLE BOXED” for safe arrival to buyer.