A keyboard amplifier is a type of audio amplifier designed specifically to amplify the sounds produced by electronic keyboards, such as synthesizers, digital pianos, and electric organs. Unlike traditional guitar or bass amplifiers, keyboard amplifiers are built to handle a wider frequency range to accurately reproduce the diverse sounds keyboards can create, from deep bass tones to shimmering highs. They typically consist of a built-in speaker system, often with multiple speakers (like tweeters and woofers) to deliver a full and clear sound across all registers.

Keyboard amplifiers generally have multiple input channels, allowing musicians to connect several keyboards or other instruments simultaneously. They also offer basic tone controls such as equalization (EQ) knobs to fine-tune the bass, mid, and treble frequencies. Some models include onboard effects like reverb, and some can function as a portable PA system due to their ability to handle microphones or other audio sources. This makes them versatile for live performances, rehearsals, or personal practice.