Amplifiers

An amplifier, in its most basic form, is an electronic device for increasing the amplitude of electrical signals. It’s used primarily for sound reproduction. It can increase the voltage, current, or power of a signal. When talking about Hi-Fi components, you will typically be talking about an integrated amplifier, which combines a preamp and power amp, typically for 2 channel stereo sound. The integrated amplifier has inputs for devices such as a turntable, CD player, or network player. It powers passive speakers since those speakers don’t have their own power supply.

An integrated amplifier not only powers speakers, but lets you select your audio source and control volume. A stereo amp handles two channels. An AV receiver is an amplifier plus a built-in tuner that also processes video signals and routes them to their intended displays. An AV receiver has the ability to power from 5 to 15 channels, delivering enveloping surround sound. All receivers are technically amplifiers, but not all amplifiers are receivers.

If you are looking for a single unit that handles both audio and video sources, you will want to look at an AV receiver. But if you don’t need an AV receiver and just need a way to hear your turntable or other hi-fi gear, then get an amplifier. An integrated amplifier is generally smaller in size. Many audiophiles will say that a dedicated, integrated amplifier will take your sound stage from “OK” to brilliant.