Plug your microphone into the back XLR jack and the XLR Tube Output jack into your live sound or recording device input, making sure that input is set up for +4dB level input (if it is set for -10dB only, use the TRS 1/4 inch output instead). If your mic requires phantom power, turn it on with the power switch. Turn up the Tube Output gain to about 1 o'clock, turn the mic impedance (Ώ) to 10k, turn the Filter to On and set the High Pass control to 12:00, turn up Mic Gain while singing until you get occasional yellow lights on the meter and you are getting a proper sound level though your system. If you hear distortion even though the meter is not lighting red, turn on the pad switch and turn up the Mic Gain control.