XLR 3 to 1 Source Selector

This source selector is a passive audio switcher with one XLR input and three XLR outputs, designed to manually route an analog signal to several devices. Its fully balanced circuit preserves conductor separation and limits sensitivity to interference, while the absence of a power supply and active stage maintains unity gain without any additional signal processing. This architecture allows the source to be routed directly to one of the three outputs, in order to alternately feed several amplifiers, preamplifiers or active systems, while maintaining a balanced connection suited to professional audio chains as well as high-fidelity installations.