Insert the red and white plugs on a two-prong stereo RCA cable into the red and white main output jacks on the rear panel of the Gemini PS-525. Plug the other end of the RCA cable into a mixer or other amplified audio system.
Connect two audio sources to the Gemini PS-525 via the RCA or 1/4-inch instrument cable input jacks on the rear panel.
Connect a pair of headphones to the 1/4-inch headphone output jack on the control panel.
Locate the power switch at the top right of the control panel and flip it to the "On" position.
Slide the "CH-1" and "CH-2" faders all the way down and press "Play" on each of the two audio sources to begin playback.
Slide the "X-Fader Control" fader all the way to the left and slide the "CH-1" fader up to increase the playback volume of the audio source connected to Channel 1. Stop sliding the fader when the "CH1" LED meter peaks at 0 decibels.
Slide the "X-Fader Control" fader all the way to the right and slide the "CH-2" fader up to increase the playback volume of the audio source connected to Channel 2. Stop sliding the fader when the "CH2" LED meter peaks at 0 decibels.
Slide the "X-Fader Control" back and forth to fade between the audio sources connected to Channels 1 and 2. Adjust the "High," "Mid" and "Low" knobs to adjust the equalization on Channels 1 and 2.