Active speakers have a built-in amplifier. Compared to passive speakers, these don't need a separate amplifier to produce sound. This way, you don't have to use with extra wires or devices. Some active HiFi speakers are equipped with an integrated streaming technique. You can control your speakers wirelessly via an app with your smartphone or tablet. Choose 2 HiFi speakers to create a stereo set. Do you prefer to listen to surround sound? Add 2 more rear speakers.