Sony TC-580
A three-speed, two-direction reel deck that turns up in odd places, including the credits of a Mission of Burma record.
Overview
This machine keeps surfacing in unlikely corners of the tape world. Bob Weston sent a correction to EQ magazine about the gear used on Mission of Burma's ONoffON. The tape deck in the chain was a Sony TC-580 - a three-speed, two-direction reel-to-reel, not the machine the original article had named. So this deck earned a place in a working studio's rack, and it did it without much fanfare.
The TC-580 was priced at $499.95, according to Sony/Superscope's own advertising in Audio (March 1973, p.51). There it sat between the $229.95 TC-353D and the $895.00 TC-850 in the lineup. That's a mid-tier slot in the early-'70s Sony reel family. The ad pitched the whole range as the obvious choice for anyone building a tape library, and it ran with a literary theme, name-dropping Shakespeare and Poe alongside the model numbers. Marketing copy is not a verdict, but the price and the placement show where the deck sat in the hierarchy.
The documentation keeps coming back to two phrases: three speeds and two directions. The three speeds are the practical part. An owner can record at one speed for fidelity and archive at another for economy. The two-direction design is the more interesting engineering claim, and it sets the TC-580 apart from the single-direction decks around it in the catalog. Most consumer decks of the era were content to do one job.
The surviving documentation doesn't give the full spec sheet. There's no published frequency response, no wow-and-flutter figure and no head configuration breakdown in the material at hand, and rather than guess, the page leaves them out. What can be said is that the TC-580 was a Sony/Superscope product of the early 1970s, sold through the same dealer network as the rest of the line. It also turns up in period open-reel directories from Audio (April 1973, p.46) alongside the other Sony machines of the moment. It has a documented place in the product lineup and at least one confirmed studio credit.
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