Dod Preamp I Have A Dod 240 Resistance Mixer That I Was Hoping To Use As A Preamp Mixer (CD) And Mics. Will This Work?

I have a dod 240 resistance mixer that I was hoping to use as a preamp mixer (CD) and Mics. Will this work? - dod preamp

I need a combination of music RCA input (karaoke), and wireless microphones. He hopes to observe 240 DOD Preamp Mixer resistance Including use of my rope. It works. It seems, 45-51 Ohm m Ohm resistor. Sounds like a lot to me. Does anyone have any suggestions. I needed something very small, and waiting for something that does not require energy.