{"product_id":"yamaha-eq-550-natural-sound-graphic-equalizer","title":"Yamaha EQ-550 Natural Sound Graphic Equalizer","description":"\u003cp\u003eYamaha EQ-550 Graphic Equalizer — Fully Serviced, Cleaned \u0026amp; Tested | Black Panel Era\u003c\/p\u003e\u003cp\u003eAdd precision tone-shaping and that unmistakable Yamaha spectrum analyzer glow to your system with this fully serviced EQ-550 graphic equalizer — a black-panel-era classic built for the golden age of Japanese hi-fi.\u003c\/p\u003e\u003cp\u003eService \u0026amp; Condition\u003cbr\u003eThis unit has gone through Black Panel Audio's full functionality and cosmetic protocol before listing:\u003c\/p\u003e\u003cp\u003e• Full exterior and internal chassis cleaning\u003cbr\u003e• Caustic glue residue removed and inspected\u003cbr\u003e• Pots, faders and switches cleaned, lubricated, and treated with DeoxIT\u003cbr\u003e• Slide faders exercised and verified smooth end-to-end\u003cbr\u003e• Spectrum analyzer display tested across all bands\u003cbr\u003e• All inputs\/outputs and tape monitor loops verified functional\u003cbr\u003e• Bench-tested for signal integrity and channel balance\u003c\/p\u003e\u003cp\u003eWhy Black Panel Audio\u003cbr\u003eWe specialize exclusively in curated 1980s–90s black-panel Yamaha gear — no mixed-era junk drawer, just era-correct pieces that were built to last and deserve a second life. Every unit we sell is inspected, tested, and cleaned by hand, and backed by our 30-Day Warranty so you can buy with confidence.\u003c\/p\u003e\u003cp\u003eWhat's Included\u003c\/p\u003e\u003cp\u003e• Yamaha EQ-550 Graphic Equalizer\u003cbr\u003e• Power cable\u003cbr\u003e• 30-day warranty from Black Panel Audio\u003c\/p\u003e\u003cp\u003eNotes\u003cbr\u003eCosmetic wear consistent with age — see photos for exact condition. Reach out with any questions before bidding\/buying. Follow us for videos @blackpanelaudio\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0674\/1360\/6461\/files\/EQ-550-manual.pdf?v=1792219302\" target=\"_blank\" rel=\"noopener\"\u003eOwner's Manual (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":43821508526141,"sku":"Z3048670Q","price":605.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/1360\/6461\/files\/browser-download-20261008T111539.443277239Z-0.jpg?v=1792036802","url":"https:\/\/blackpanelaudio.com\/products\/yamaha-eq-550-natural-sound-graphic-equalizer","provider":"Black Panel Audio","version":"1.0","type":"link"}