Your recording or live performance will only sound as good as your speaker. That's why it's one of the most important pieces of any setup. Typically, loudspeakers have their own amplifier in the cabinet (active), though some may need to be externall amplified (passive). Of course, speakers vary in quality and in applications. QSC mainly produces heavily amplified loudspeakers for live events, while Focal and Genelec focus on studio applications. Some, like Yamaha H series, will feature a woofer and a tweeter, but others, such as Focal Trios, offer 3 drivers, for maximum precision and clarity.