4U

4U groups modules in Buchla and Serge formats.

Module dimensions

The height of 4U format synthesizer modules is 7", or four standard rack heights. Buchla modules are multiples of 4.25" wide, and most Serge modules are full-width panels that are 17" wide (they occupy the full space within a 19" rack's mounting hardware).

See also

• Comparison of 4U module brands
• 4U DIY parts