This is the SONY top-of-the-line Denon TC-D5M. It supports metal tapes. Prior to listing, it has undergone cleaning of all parts, restoration treatment, replacement of drive system parts, and sound adjustments, making it fully overhauled and essential for continued use. Despite being old, its appearance is good (in my opinion). It offers ultra-high sound quality and is very rare. You will hardly notice the typical sound fluctuations and excessive noise common with cassette tapes. It produces powerful and good sound. It showcases the performance and sound quality of a professional Denon. The Sony power adapter AC-9 shown in the photos is included. Basic cleaning of the exterior and interior, cleaning of mechanical parts, reassembly, main belt replacement, counter belt replacement, cleaning of the headphone jack, cleaning of the microphone jack, cleaning and polishing of the head section, replacement and cleaning of rollers, and cleaning of volume parts. Azimuth adjustment and speed adjustment. All functions have been checked: playback, recording, stop, fast forward, rewind, and auto shut-off. The level meter, peak indicator, lamp lighting, and counter are also operational. Long-duration operation tests and listening tests have been conducted. Measurement tools were used for speed adjustment, wow and flutter measurement, and azimuth adjustment. Appropriate chemicals and oils were used during the repair process. Although it is a very old machine, it has been restored to a condition very close to its original state through disassembly cleaning, replacement of key parts, and fine sound adjustments. I would like to pass it on to someone who will take good care of it. It is a vintage item, but you can enjoy it with the pleasant sound just like back in the day. However, please note that this is a personal sale of used electronics (antiques). If you require after-sales service or are overly sensitive, please refrain from purchasing. Those individuals should seek out new products. I will definitely respond, so please rest assured.