{"product_id":"rvb-95055633-akai-gx-635d-pro-serviced-open-reel-stereo-tape-deck-fully-tested-w-video","title":"Akai GX-635D Pro Serviced Open Reel Stereo Tape Deck, Fully Tested w\/Video","description":"\u003cp\u003eOffered  here is a beautiful and fully serviced AKAI GX-635D, one of the most  desirable open-reel decks from Akai's classic late-1970s lineup. This  unit has just been professionally serviced and calibrated by Vic at  Wiktor Amps (March 2026) and is performing to — and in several areas  exceeding — original factory specifications.\u003c\/p\u003e\u003cp\u003eThe  GX-635D is well known among tape enthusiasts for its extremely durable  GX glass-ferrite heads, excellent frequency response, and refined  transport. With proper servicing these machines remain superb performers  for playback, tape archiving, or home recording.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eProfessional Service – March 2026\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eService was completed by Wiktor Amps, a respected technician experienced with vintage reel-to-reel equipment.\u003c\/p\u003e\u003cp\u003eWork performed includes:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTransport calibrated to original manufacturer specification\u003c\/li\u003e\n\u003cli\u003eSpeed verified and adjusted\u003c\/li\u003e\n\u003cli\u003eHead alignment performed\u003c\/li\u003e\n\u003cli\u003eRecord and playback electronics calibrated\u003c\/li\u003e\n\u003cli\u003eOutput level calibrated (0 VU set to 0.775V \/ dBm, output control reference position \"8\")\u003c\/li\u003e\n\u003cli\u003ePlayback level calibrated to 185 nWb\/m, period-correct reference level\u003c\/li\u003e\n\u003cli\u003eRecord section calibrated for Quantegy 456 tape formulation\u003c\/li\u003e\n\u003cli\u003eKnown-issue transistors replaced with proper substitute components\u003c\/li\u003e\n\u003cli\u003eElectrolytic capacitors in the input preamp replaced\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBench testing confirms:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFlat response to 15 kHz\u003c\/li\u003e\n\u003cli\u003eNear-flat response approaching 20 kHz\u003c\/li\u003e\n\u003cli\u003ePerformance exceeding original manufacturer specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eGlass ferrite heads show no visible wear, suggesting comparatively low lifetime use.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eThis GX-635D is in excellent working condition and has just been tested extensively on the technician's bench.\u003c\/p\u003e\u003cp\u003eHighlights:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTransport runs smoothly and quietly\u003c\/li\u003e\n\u003cli\u003eRecord and playback functions operate correctly in both directions\u003c\/li\u003e\n\u003cli\u003eStrong and stable frequency response verified on test equipment\u003c\/li\u003e\n\u003cli\u003eHeads are exceptionally clean with no observable wear\u003c\/li\u003e\n\u003cli\u003eAll controls operate properly\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCosmetically  the deck presents very well for its age. The faceplate is clean, the  wood panels remain attractive, and overall the unit has clearly been  well cared for.\u003c\/p\u003e\u003cp\u003ePlease review the photos carefully, as they form part of the description.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003ePerformance Verification\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eIncluded  with the listing is video showing the unit under test, demonstrating  frequency response from 1 kHz through 20 kHz in both directions using  laboratory test equipment including an oscilloscope and distortion  analyzer.\u003c\/p\u003e\u003cp\u003eThis documentation confirms the deck's excellent operational condition following service.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eModel Highlights\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eThe GX-635D is one of Akai's most respected consumer reel-to-reel machines, known for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003cstrong\u003eGX Glass-Ferrite heads\u003c\/strong\u003e\u003c\/b\u003e — extremely durable and resistant to wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e\u003cstrong\u003eThree-motor transport\u003c\/strong\u003e\u003c\/b\u003e for stable tape handling\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e\u003cstrong\u003eSix-head design\u003c\/strong\u003e\u003c\/b\u003e (two record, two playback, two erase) enabling full record, playback, and erase capability in \u003cb\u003e\u003cstrong\u003eboth directions\u003c\/strong\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e\u003cstrong\u003eAuto-reverse\u003c\/strong\u003e\u003c\/b\u003e for continuous playback or recording in both directions without flipping the reel\u003c\/li\u003e\n\u003cli\u003e7½ and 3¾ IPS speeds\u003c\/li\u003e\n\u003cli\u003e10.5 and 7-inch reel capacity\u003c\/li\u003e\n\u003cli\u003eWide frequency response and low distortion performance\u003c\/li\u003e\n\u003cli\u003eClassic brushed aluminum faceplate with wood panels\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese decks are prized both for reliable playback of vintage tapes and for analog recording projects.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eIdeal Uses\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlayback of vintage prerecorded tapes\u003c\/li\u003e\n\u003cli\u003eVinyl or cassette transfer to tape\u003c\/li\u003e\n\u003cli\u003eAnalog recording and mixdown\u003c\/li\u003e\n\u003cli\u003eTape archiving\u003c\/li\u003e\n\u003cli\u003eClassic hi-fi systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003ci\u003e\u003cem\u003e(Any tape reels shown in photos are for demonstration only unless otherwise stated.)\u003c\/em\u003e\u003c\/i\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cstrong\u003eShipping\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eThis unit will be carefully packed for safe shipment, with particular attention to protecting the transport and reel tables.\u003c\/p\u003e\u003cp\u003eShipping will be fully insured and require signature confirmation.\u003c\/p\u003e\u003cp\u003eLocal pickup is welcome.\u003c\/p\u003e\u003cp\u003eInternational shipping rate is based on shipping cost to Australia, the furthest destination from my USA location. Please inquire for shipping cost to your non-US address.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Very Good\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLocation:\u003c\/strong\u003e Andover, MA, United States\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSeller:\u003c\/strong\u003e Booty\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSource URL:\u003c\/strong\u003e \u003ca href=\"https:\/\/reverb.com\/item\/95055633-akai-gx-635d-pro-serviced-open-reel-stereo-tape-deck-fully-tested-w-video\"\u003ehttps:\/\/reverb.com\/item\/95055633-akai-gx-635d-pro-serviced-open-reel-stereo-tape-deck-fully-tested-w-video\u003c\/a\u003e\u003c\/p\u003e","brand":"Akai","offers":[{"title":"Default Title","offer_id":50300161065206,"sku":"95055633","price":3200.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/2882\/7894\/files\/a61617ca-1bc9-4ce4-b9a9-8c33aa0e8ee6.jpg?v=1775229917","url":"https:\/\/envoy-music.myshopify.com\/products\/rvb-95055633-akai-gx-635d-pro-serviced-open-reel-stereo-tape-deck-fully-tested-w-video","provider":"Envoy Music","version":"1.0","type":"link"}