Course Description
This video demonstrates how to get the estimated power required for loudspeakers.
Who it’s for. Technicians, installers, and designers who need working command of electrical fundamentals before sizing circuits or wiring a rack.
Learning outcomes.
Define voltage, current, resistance, impedance, and power, and name the unit of measurement for each
Rearrange Ohm's Law to solve for voltage, current, or resistance in an AV circuit
Estimate the power required for loudspeakers and other AV loads, keeping draw within 80 percent of circuit capacity
Predict whether current will flow in a given series or parallel circuit, and explain how wire length and gauge affect resistance
Trace electrical power from the main distribution panel through feeders, subpanels, and branch circuits to AV outlets
Apply system and equipment grounding practices, including rack grounding and GFCI use, to reduce shock and noise risk
Topics covered.
Voltage, current, resistance, and impedance
Direct vs. alternating current
Ohm's Law and circuit components
Series and parallel circuits
Grounding, power distribution, and electrical safety