The Retro Instruments Link Panel is a 1U rack-mounted accessory designed to facilitate stereo linking of two Retro 176 or two Retro Sta-Level units. It features a front-accessible toggle switch to engage or disengage stereo linking as needed. The panel includes an integrated RCA-terminated cable that connects to the “couple” input of the corresponding units, enabling switchable dual mono or stereo functionality. This setup is particularly useful when maintaining a stable stereo image is crucial, such as during mix bus processing