In spite of the relative inconvenience and generally more expensive media, reel-to-reel systems developed in the early 1940s remained popular in audiophile settings into the 1980s and have re-established a specialist niche in the 21st century. By writing the same audio signal across more tape, reel-to-reel systems give much greater fidelity at the cost of much larger tapes. Reel-to-reel preceded the development of the compact cassette with tape 0.15 inches (3.8 mm) wide moving at 1 + 7⁄ 8 inches per second (4.8 cm/s). All standard tape speeds are derived as a binary submultiple of 30 inches per second. Domestic consumer machines almost always used 1⁄ 4 inch (6.35 mm) or narrower tape and many offered slower speeds such as 1 + 7⁄ 8 inches per second (4.762 cm/s). The end of the tape is manually pulled from the reel, threaded through mechanical guides and over a tape head assembly, and attached by friction to the hub of the second, initially empty takeup reel. To prepare for use, the supply reel (or feed reel) containing the tape is placed on a spindle or hub.
Reel-to-reel audio tape recording, also called open-reel recording, is magnetic tape audio recording in which the recording tape is spooled between reels. A reel-to-reel tape recorder (Sony TC-630), typical of a 1970s audiophile device.
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