Karaoke Forums

anybody knows of a website to get a manual for a gemini mixer please let me know what i got is im doing karaoke using jvc tripple tray player,and since the gemini 727 has only one mic input im using a yamaha mixer just for mics coming out of the rec output to a line input on gemini,my karaoke player and cd player for djing,is hooked to other line inputs,the outputs are run to a mackie fr m1400i amperflier,i just cant get good mic volume any help will be apperciated thanks