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A preamplifier, also known as a preamp, is an electronic device that strengthens an electrical signal from a source, such as a record player, to a line level before it reaches the power amplifier. It has a volume control but lacks a tuner and tone controls found in a receiver.

A receiver, on the other hand, is an all-in-one unit that has a preamplifier, power amplifier, and a tuner in one chassis. It also includes tone controls and various other features such as Bluetooth, USB, and more. It is meant to be the centerpiece of a home stereo or home theater system.