Tascam T-2640
A cassette duplicator that records all four tracks in a single pass - so its real copy ratio is double what the speed number suggests.
Overview
The T-2640 is not a hi-fi deck with a fancy badge. It is a duplication system, sold as separate master and slave transports. It was built for the small operation that needed to turn out modest runs of music cassettes without buying a room full of industrial gear. The trick is simple. Copy speed runs at 8:1, but the machine records all four tracks in one pass, so the effective copy ratio is actually 16:1. That's twice the throughput for the same clock time.
Tascam sold it as two pieces. The T2640MS is the master, listed at $2,999.00. It carries the features that make the system usable: pitch control on the master deck, a built-in monitor speaker, an automatic rewind switch, and automatic stop on the slave synced to the master. The T26402S is the dual slave transport at $2,749.00, and up to ten of those 2S units can be slaved to each MS deck. A shop could start with one master and one slave and add to the stack as orders grew, rather than committing to a fixed-capacity machine.
The build details read like a manufacturer who expected these things to run all day. Plug-in amp circuit boards mean a failed channel gets swapped rather than sent out for service. Ball bearings go on all rotating parts, which suits the continuous-duty life a duplicator sees. None of that is glamorous, but it is what separates a production tool from a consumer deck.
The used market reflected it too — by the early 1990s, Tascam duplication gear of this era was still circulating among small shops, as seen in the classified listings of Recording Engineer (February 1992, p.68).
That is the honest framing for anyone considering one today. The T-2640 is a specialized production machine, and its value depends entirely on whether you have cassette duplication to do. Collectors note the master/slave modularity and the plug-in board serviceability as the interesting engineering; owners report the practical reality that a duplicator is only worth owning if it is running. It is a piece of small-shop manufacturing history more than a listening instrument — and judged on those terms, the 16:1 effective ratio and the ten-slave ceiling make it a genuinely capable one.
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