You need an amp with passive speakers, which don’t have built-in amplification. There are a few different ways to power passive speakers: on the less-expensive end, consider a stereo receiver, which combines amplification, an AM/FM tuner, and control features. Consider investing in a good-quality dedicated power amplifier or integrated amplifier for better sound. If you’re looking to bring new functionality to passive speakers, consider something like the Marantz Model 40n integrated amplifier, which offers built-in music streaming via its HEOS system, Spotify Connect, Apple AirPlay, and Bluetooth, and covers all of your components with a full range of analog and digital I/Os, including phono in and HDMI ARC. Check your speaker specs to determine how much wattage it can handle. Powered, or active, stereo speakers have built-in amplification, meaning you won’t have to worry about matching components or adding extra gear and cables to your space.