Which of the following is NOT a variable to consider when selecting microphones?

When selecting microphones for a specific application, several factors are critical for ensuring optimal performance and compatibility. Among these factors, microphone type, cost, and size/stands are essential considerations that influence the microphone's functionality, integration into existing setups, and budget constraints.

Microphone type refers to the specific technology and design of the microphone (such as dynamic, condenser, or ribbon), which affects sound quality, sensitivity, and application suitability. Microphone cost plays a vital role in budgetting and ensuring the equipment meets the financial constraints of the project or organization. Size and compatibility with stands ensure that the microphone can be positioned correctly to capture audio effectively based on the intended use.

In contrast, microphone color has little to no impact on the audio quality, performance, or functionality. While it may play a role in aesthetic preferences or branding, it does not influence the operational capabilities of the microphone in a practical sense, making it an irrelevant factor in the selection process. Therefore, identifying microphone color as a non-variable helps clarify the focus on more pressing considerations in microphone selection.