Open the three telescoping legs on the MSt-4B. Turn each leg barrel a half turn clockwise to lock them out. Pull the center tube up and turn the barrels clockwise until the tube is locked and in the upright position.
Lift the Nady WA 120 PA amplifier up, with an assistant. Lift with the knees to prevent back injury. Place the amp so the tripod tube is in the center of the amp. Align the tube's threaded center screw to the amp's screw hole.
Turn the amp clockwise until it stops and the screw mount is connected between the tripod and the amp. Turn the tripod to position the amp; do not turn the amp counterclockwise to position the speaker.