Frac rack: Difference between revisions

Like the [[Eurorack]] format, Frac is considered a [[3U]] format. The height of most modern modular synthesizer modules is measured by the number of vertical units it consumes in a standard [[19-inch rack|19" equipment rack]]. Modules conforming to the 3U format will take up three vertical units in a 19" equipment rack. Each vertical rack unit is {{frac|1¾|3|4}}", so a 3U module is {{5¼|3|4|}}" (133.35 mm) tall. The Frac format has a standard width unit of {{frac|1½|1|2}}". So 3" (76.2 mm) and {{frac|4½|1|2}}" (114.3) wide modules are common in this format.<ref name="measures" />