{"product_id":"m-903s-dual-tube-microphone-power-supply-tf39-tf47-tf51-ak-47mkii-ar-51-m16","title":"M 903S Dual Tube Microphone Power Supply (TF39, TF47, TF51, AK-47MkII, AR-51, M16)","description":"Designed and assembled in the USA, this compact M903S dual power supply design provides safe and reliable power in a small footprint. The circuit features premium quality capacitors, improved regulation, and RF suppression. The M 903S has two on-board 3-position polar pattern switches, and will power two TF39, TF47, TF51, AK-47 MkII, AR-51, or M16 tube microphones.\n\n7-Pin XLR Pin-out:\n\n1 – B+ (120VDC)\n\n2 – Heater (6VDC)\n\n3 – Polarizing (0\/60\/120VDC)\n\n4 – Ground\n\n5 – Audio (-)\n\n6 – Audio (+)\n\n7 – Ground\n\nThese units are hand-built in South Windsor, CT, USA with premium components including a Triad transformer, Nichicon capacitors, Neutrik connectors, and a PCB layout made to maximize current handling. They are built well over-spec to ensure reliability and safe operation for decades. They are burned in as a full unit to ensure optimum performance and operation.","brand":"Telefunken Elektroakustik","offers":[{"title":"Default Title","offer_id":45417020784726,"sku":"AM-PSU-M903S","price":459.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/0255\/9318\/files\/M903S-2026.jpg?v=1784559679","url":"https:\/\/www.telefunken-elektroakustik.com\/products\/m-903s-dual-tube-microphone-power-supply-tf39-tf47-tf51-ak-47mkii-ar-51-m16","provider":"Telefunken Elektroakustik","version":"1.0","type":"link"}