{"product_id":"sansui-qs-500-quad-decoder-rear-amplifier-tested-working-serviced-vintage-1972-1974","title":"Sansui QS-500 Quad Decoder \u0026 Rear Amp – Serviced (DeoxIT), Fully Tested, Clean","description":"\u003cp class=\"p1\"\u003eUp for sale is a vintage \u003cspan class=\"s1\"\u003e\u003cb\u003eSansui QS-500 quadraphonic synthesizer\/decoder\u003c\/b\u003e\u003c\/span\u003e, fully tested and in solid working condition. This unit has been carefully checked to ensure \u003cspan class=\"s1\"\u003e\u003cb\u003eall channels, inputs, and outputs are functioning properly\u003c\/b\u003e\u003c\/span\u003e, making it a reliable addition to any vintage audio setup. This unit has been a gem in my setup.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003eThis model is highly desirable for its ability to both \u003cspan class=\"s1\"\u003e\u003cb\u003edecode QS matrix quadraphonic signals\u003c\/b\u003e\u003c\/span\u003e and \u003cspan class=\"s1\"\u003e\u003cb\u003esynthesize 2-channel audio into immersive 4-channel sound\u003c\/b\u003e\u003c\/span\u003e. Additionally, it can be used as a \u003cspan class=\"s1\"\u003e\u003cb\u003erear channel amplifier\u003c\/b\u003e\u003c\/span\u003e, making it an excellent solution for building or expanding a quadraphonic system.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eFunctionality\u003c\/b\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003eFully tested – \u003c\/span\u003e\u003cspan class=\"s2\"\u003e\u003cb\u003eall channels working properly\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eAll inputs and outputs verified\u003c\/b\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eControls cleaned and \u003cspan class=\"s1\"\u003e\u003cb\u003eserviced with DeoxIT\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eSmooth operation across all switches and knobs\u003c\/li\u003e\n\u003cli\u003eStrong, clean quadraphonic output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eQS matrix quadraphonic decoder\u003c\/li\u003e\n\u003cli\u003e2-channel to 4-channel synthesizer mode\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003eCan function as a \u003c\/span\u003e\u003cspan class=\"s2\"\u003e\u003cb\u003erear channel amplifier\u003c\/b\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMultiple connection options for flexible system integration\u003c\/li\u003e\n\u003cli\u003eClassic warm Sansui sound\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003eCosmetic Condition\u003c\/b\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"p4\"\u003eThe unit is in \u003cspan class=\"s1\"\u003e\u003cb\u003egood overall cosmetic condition\u003c\/b\u003e\u003c\/span\u003e\u003cspan class=\"s2\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eScratches present on the wood case\u003c\/b\u003e\u003c\/span\u003e (typical for its age)\u003c\/li\u003e\n\u003cli\u003eFront panel remains clean and presentable\u003c\/li\u003e\n\u003cli\u003eNo major structural damage\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eiko Vintage","offers":[{"title":"Default Title","offer_id":52435813433631,"sku":"SANS#QS500","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/9869\/5199\/files\/8A49195E-1990-4EFF-B73D-45F6D41EB930_1_102_o.jpg?v=1777143677","url":"https:\/\/eikovintage.com\/products\/sansui-qs-500-quad-decoder-rear-amplifier-tested-working-serviced-vintage-1972-1974","provider":"Eiko Vintage","version":"1.0","type":"link"}