There are two large rectangular blocks. The left one is labeled preamplifier and the right one is labeled power amplifier. They are connected together by a stereo audio cable. At the top of the diagram is a representation of a wall with an electrical outlet on it. A line cord goes from the preamp and is plugged into the wall outlet. Similarly the power amp is plugged into the wall outlet. The two line cords and audio cable form a rough triangle. The area inside this triangle is shaded. End verbal description.
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