This course provides an introduction to the physics of electricity, emphasising critical concepts such as Ohm's Law, Watt's Law, and both direct current (DC) and alternating current (AC) theory. These foundational principles equip students with the necessary understanding of basic sound equipment circuits, which is essential for any aspiring sound engineer. The curriculum further explores conventional and switch-mode power supplies, providing insights into their operational characteristics and applications. Students will delve into reactance and filters, which are vital for understanding signal processing in audio systems. The course will also cover operational amplifiers (op-amps) and amplifiers, enabling students to grasp the fundamentals of amplification in audio electronics.