Don't toss old speakers in the garage—they can enhance your TV experience for nearly free. Active speakers (with built-in amps and 3.5mm or RCA ports) work directly with most TVs. Passive speakers need an external amplifier. Check your TV's audio outputs: analog 3.5mm/RCA jacks work best, optical requires a converter, and HDMI ARC needs specialized gear. USB-powered PC speakers need separate audio cables since TV USB ports typically only deliver 2.5W—enough for small desktop speakers but not power-hungry models.
Some TVs have HDD-marked USB ports that supply up to 900mA, which may work better. Test your setup at low volumes first to avoid power issues.
Source: Engadget · Summarized by HeadlinesBriefing