No worries on speakers blowing up for karaoke use if you are a little careful. I have one of my DVD players (similar to Malata player) that has mic inputs and plays CD-Graphics discs too. I have a 2-wireless mic set.

The L/R (analog) outputs of the DVD player are connected to my Yamaha 1400 receiver which is connected to the M22's & M60's.

Definitely try and avoid turning off the mic.s when volume level on the amplifier is set to very high as this will create a loud popping sound.