A microphone preamp in the 500 Series module format that mounts into a master 500 Series chassis (sometimes known as a “lunchbox” or “500 Series rack,” depending on the form it takes), which provides the power supply, input and output connections, and in some cases other features such as mixing, sidechains, and more. The 500 Series format offers advantages such as reduced price, increased portability, standardized design, compact form factor, and more.
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