This is a stunning Nakamichi 660ZX 3 head cassette deck that has recently been serviced and produces an awesome sound. Made in Japan, this vintage electronics gem is a must-have for any true audiophile. The brand Nakamichi is well known for producing high-quality audio equipment and this model is no exception. With its sleek design and superior performance, the 660ZX is perfect for anyone who appreciates the warmth and depth of analog sound. Whether you're a collector or simply looking for a top-of-the-line cassette deck, this is the one for you. Recently this audiophile cassette deck has been fully serviced the following work was done: it was rechecked again today just before listing it today . 1. New rubber idler tire installed for ultra fast forward and rewind time and rock steady playback . 2. The whole tape transport was dismantled painstaking cleaned and lubricated . The double drive Capstan shafts cleaned and polished of old tape residue for ultra smooth rotation . The two rubber rollers and their assembly removed the lubrication in these assembly dries and get hardened rendering their rotation with the shaft inpossible both these assemblies removed their bearings carefully cleaned , polished and lubricated the same was done for rubber roller shafts . The 3 motors front bearing lubricated for smooth rotation . The capstan rubber belt and transport mode belts are original and in excellent shape . One of the counter belt was replaced . The fragile cable activated record secured with custom screw and bolt .The heads are like new these too were carefully cleaned and polished for The moving parts lubricated resulting in like new performance . 2. The infamous trouble orange disease pp coupling capacitors found these quality tape decks that go out of order all of sudden for no reason causing all kinds of problem with the audio signal like noise erratic operation removed and quality audiophile GERMAN WIMA red coupling capacitors found in hi end audio equipment . 3. Every single electrolytic capacitor replaced with quality audiophile capacitors like nichicon fine gold, KT blue audio , wurth red German capacities . The very important power supply capacitors up graded to 10,000uf and 4700uf capacitor for rock solid power supply . I don’t like long ac line cords as they have a habit of getting into way and shorter the ac power cord the less resistance to ac current so the power cord length has been shortened to make it more manageable with less clutter . 4.Every square inch of this beauty and polished inside and outside although there imperfections still in finish and scratched on top of the black metal removable cover . The beautiful front face look like new. The tips of couple of sliding switches in the row of sliding switches on the right side has been reinforced with custom made copper metal covers and painted black to match the others resulting in better performance than orginal . All this hard work as paid off ! When you use this quality tape deck. It makes truly AWESOME RECORDINGS. The auto calibration works great on all three tape formulation as can be seen in the pics and there are video in the showing the tape deck sucessfully doing auto calibration with a TDK SA cassette tape . Please noe the auto calibration will not work with certain tapes that have gone bad . The BEST! Recording of course will be with a metal cassette tape with which the frequency is mind numbing ! 22,000hz according to this tape deck specs this kind of performance is expected only from a hi end pro reel to reel tape. YOU WILL LOVE IT! Note: NICE! FRIENDLY! AND SERIOUS BUYERS ONLY! NO SCAMMERS BUYERS PLEASE! No returns and no refunds on this vintage used item. Thank for your purchase and for your business both of which are greatly appreciated ! . You are a valued customer.