{"product_id":"1-pair-reference-marantz-ma-9s2-hifi-audio-amplifier-board-pcb-with-midpoint-servo","title":"1 Pair Reference Marantz MA-9S2 HiFi Audio Amplifier Board PCB With Midpoint Servo","description":"Product Details:\n\n\nBased on the classic Marantz MA-9S2 power amplifier circuit. ,\n\nAdopt the same main circuit as the original machine. Using the HDAM-SA module topology, the input is a very nice Diamond Buffer circuit, also called \"diamond (diamond) expansion circuit\", and the I\/V mirror circuit is used between the voltage levels, and the matching characteristics before and after are excellent. The feedback form is current negative feedback, which has excellent load control ability. In addition, a midpoint servo circuit and a more complete speaker protection circuit are added. The intermediate voltage is very stable and is basically a few millivolts.\n\nPower supply range: main voltage dual DC 35~55V (dual DC 45V is recommended); speaker protection power supply single AC 12~17V (single AC 12V is recommended).\n\nPCB size: 167*83MM\n\nTips: We also have finished boards and complete kits for sale, if you need them, please contact us. Thanks! ! !\n\nPackage list:\n\n\n1 pair × Bare PCB\n\n","brand":"mickcara","offers":[{"title":"Default Title","offer_id":46440397275273,"sku":"NIMENJIAOWOZ","price":35.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0365\/2131\/2393\/files\/Hc963e87bb86e4b2abf679677c8f4b4f3v.webp?v=1778050152","url":"https:\/\/mickcara.com\/products\/1-pair-reference-marantz-ma-9s2-hifi-audio-amplifier-board-pcb-with-midpoint-servo","provider":"mickcara","version":"1.0","type":"link"}