NAD 6125
What the record shows: it is a stereo cassette deck, made in Japan, dating to the early 1980s. It uses two heads and carries the designation “M/X Head,” though what specific head technology or circuit topology that referred to has not survived in any readily available literature; a contemporary review noted that capacitor dielectric type could affect performance (HiFI-Stereo, Dec 1983, p.26).
The 6125 appears to have been sold alongside other NAD cassette decks of the period - the 6100, 6140, and 6155. At least one owner paired it with the NAD 7125 amplifier and NAD 5125 turntable, which suggests NAD positioned it as a component in a matched system.
User reports are sparse. One owner on Tapeheads.net described a unit as “normal dan quite mint condition” and noted a slight channel imbalance between the two outputs. Another used the deck for mixing car stereo. The most commonly reported issue is belt wear. Belts slip or fail, which causes playback speed errors and transport problems. Aftermarket belt kits are available (compatible with the 6100, 6125, 6140, and 6150C). A service manual exists at servicemanuals.net, and the user manual is preserved in the HiFi Engine library.
Original MSRP, detailed specifications (power output, frequency response, THD, signal-to-noise ratio, wow and flutter), Dolby noise reduction type, and physical dimensions are all unrecorded in the sources found so far. Used prices have appeared at $97 (2017), AU$325 (Etsy, date unspecified), and $159.99.
Known specs at a glance:
- Type: 2-head, single compact cassette deck
- Heads: 2 heads, branded “M/X Head”
- Country of manufacture: Japan
- Production period: Early 1980s (conflicting sources cite 1982 and 1983)
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