The Yamaha YST-SW 320 is a subwoofer designed to enhance the low-frequency performance in home audio and music systems. It features a built-in amplifier that delivers substantial power output for deep, impactful bass. This model uses Yamaha's Advanced YST II technology, which provides improved performance and efficiency. The subwoofer typically has adjustable volume and crossover settings, allowing users to tailor the bass response to their specific preferences and room acoustics. Its design is compact enough for easier placement in various environments, and it is suitable for both music and home theater applications.