15 Inch Full Range Speakers
15 inch two-way loudspeakers are pro audio speakers that have a fifteen inch woofer for low frequencies, and a compression driver or a tweeter for high frequencies. This category contains 15 inch speakers that are passive, in other words they require an external pro audio power amplifier in order to work. In contrast, you can get 15 inch active, or powered speakers that have an amplifier module built-in.
15 inch two-way speakers are very popular in pro audio because they can produce a decent amount of bass for those gigs where you do not wish to bring a subwoofer.