Can I use and SM-750v headset with my Maestro? If I can use the headset what would the mic settings

Basically, you can make any mic work. Your model is ideal, because it is a computer headset with a condenser mic. The plugs are correct for the Maestro's Mic 2 and headphone jacks. Start with the Default mic profile, and make a new mic profile, Create name is SM750. Menu > Phone/CW > Bias ON +20dB Enabled Press the mic gain button. Select M-Mic2, PROC DX, Level 50%, MON OFF, DAX ON, Low 150, High 2900. Save Press the mic knob then Press the large tuning knob until the menu appears. While transmitting, press the red record button. Press red record again to stop recording. Press the green pkay button and listen to yourself.