Live Sound is basically what it says; you're hearing sound, or music, and it's live. It could be an "unplugged" type of show where there is one performer with an Acoustic guitar and back up
instruments. It could be an arena with the headliner as a popular band that's getting air play.
In either case, there are items they need to make their show a success. What if the band in the arena blows a speaker? Surely they will need to replace it to ensure their sound is what the masses want. Most of the larger, well known bands will have extras but you never know. East Coast Music Exchange carries Speakers, Mixers, Stands, and Microphones to help any type of band complete their sound.