AV Power Amplifiers

About AV Power Amplifiers

AV power amplifiers are essential components in home cinema and high-fidelity audio setups, responsible for driving passive speakers with clean, controlled power. Unlike AV receivers, these dedicated units focus solely on amplification, allowing for greater clarity and dynamic range—particularly useful in more advanced or multi-channel systems.

They are available in a range of channel configurations, typically starting at two channels for stereo systems and scaling up to seven or more for immersive surround sound. The number of channels determines how many speakers can be driven, making it easier to tailor your system layout to the room and listening preferences. RMS power ratings, measured in watts per channel, give an idea of how much sustained power each speaker will receive. Higher RMS values tend to offer better headroom and lower distortion at louder volumes.

In terms of connectivity, AV power amplifiers usually offer a mix of options to integrate with a variety of preamps and AV processors. Common inputs include RCA (phono) and balanced XLR, while many models also include 12V trigger inputs for automatic power control—ideal for building a seamless system that switches on and off with your source equipment.

Well-known brands such as Anthem, Arcam, Audiolab, Emotiva, Marantz and Monitor Audio each offer their own take on amplifier design, balancing tonal character, build quality and system compatibility. From solid-state designs to those that emphasise warmth and musicality, there are plenty of choices depending on your audio goals.

With a dedicated AV power amplifier, you can unlock better performance from your speakers and create a more detailed, immersive soundstage that’s well-suited to film, music and everything in between.

AV Power Amplifiers FAQs

What are the three types of power amplifiers?

The three types of power amplifiers are Class A, Class B, and Class AB. These classes differ in how they handle signal conduction and efficiency. Class A offers high fidelity but low efficiency, while Class B and AB balance performance with power savings.

Why is it called a power amplifier?

It is called a power amplifier because its main function is to increase the power level of a signal. Unlike voltage or current amplifiers, power amplifiers deliver higher output energy to drive loads like speakers.

What makes a good power amplifier?

A good power amplifier is defined by its ability to deliver clean, distortion-free power efficiently. High signal fidelity, thermal stability, and low total harmonic distortion are essential traits. Effective impedance matching and energy efficiency also improve performance.