Dynamic loudspeakers use traditional speaker drivers ("transducers") normally connected via crossover network to send the high frequencies to the tweeters, the midrange audio to the midrange driver and the low-frequency material to the larger woofers.
Dynamic speakers can commonly be found as two-way bookshelf speakers, three-way floor-standing speakers or in even more complex configurations. Dynamic speakers have the most popular speaker design in the audiophile and home theater market.
Unless you are looking for an active loudspeaker design, you will need something to power them, like a receiver or amplifier. Most speakers these days are paired with a subwoofer for better bass response.