In other words, you need an amplifier to listen to something coming out of the speakers. No way, laptop PCs were built for audio line output. To hear an appropriate lever sound and also have a line output connector, the laptop was equipped with a very low power amplifier (to conserve battery). The line output is measured in volts, the output of the audio amplifier is measured in current(watts), you need an amplifier no matter which one (PC or laptop) you want to connect those speakers to. There are convenient ways to connect Bluetooth, WIFI and self-amplified speakers to a PC, and more... P.D. Some desktops, particularly those built for games, come with audio amplifiers and speakers inside.