Professional Passive Hifi Stage Speakers 2 pcs 1000 W BlackThese professional passive Hifi stage speakers are durable and suitable for medium sized activities, events and parties. Both speaker boxes are designed with two bass reflex holes, which can extend the frequency response to the lowest range and provide bass. These are produced by 2 heavy duty 8 inch (20 cm) woofers whose bass relief membrane contributes to avoiding destructive local vibrations. The bass is especially suitable for dancing and music