Eric B,
You must stay in the mic directly on the screen sing not loud and adjust the input voulme to max just before the red light. I use a peavy mic like comes with the small escort pa an a S W R workingmans 12 amp. Also use the standard harmony for ladies and the country girls for men this keeps the harmony on the scale no blanks so to speak. I also play a PSR 8000 in a five piece band I use Brass, Sax, 12 string guitar, Fiddles, Strings, Vibes. all with one hand. Lost the left in an electrical accident I also use full keyboard on the psr 740 this allows the background to follow the right hand melodie the psr 740 does this better than the psr 8000 dont know why. I play the 8000 through two 6-14e webb steel guitar amps talk about a sound wow heaven here on earth. Hope this helps.
Looking for a 9000 PR0 in the near future.
Wvamouse