DJ Mixer

A DJ mixer is a type of audio mixing console used by Disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance club. Hip hop DJs and turntablists use the DJ mixer to play record players like a musical instrument and create new sounds. DJs in the disco, house music, electronic dance music and other dance-oriented genres use the mixer to make smooth transitions between different sound recordings as they are playing.

History
DJ mixing played a key role in the development of the African-American style of hip hop music. In hip hop music and occasionally in other genres that are influenced by hip hop, the turntable is used as a musical instrument by DJs, who use turntables along with a DJ mixer to create unique rhythmic sounds and other sound effects. In the 2010s, many hip hop DJs use DJ CD players or digital record emulator devices to create scratching sounds; nevertheless, some DJs still scratch with vinyl records.

Description
DJ mixers are usually much smaller than other mixing consoles used in sound reinforcement systems and sound recording. Whereas a typical nightclub mixer will have 24 inputs and a professional recording studio's huge mixer may have 48, 72 or even 96 inputs, a typical DJ mixer may have only two to four inputs. The key feature that differentiates a DJ mixer from other types of larger audio mixers is the ability to redirect the sounds of a non- playing source to headphones, so the DJ can find the desired part of a song or track and the presence of a crossfader, which allows an easier transition between two sources.

Outputs
The output from a DJ mixer is typically plugged into a sound reinforcement system or a PA system at a dance, rave, nightclub or similar venue or event. The sound reinforcement system consists of power amplifiers which amplify the signal to the level that can drive speaker enclosures, which since the 1980s typically include both full-range speakers and subwoofers for the deep bass sounds. If the DJ is performing a mix for a radio station or television station, the output from the DJ mixer is plugged into the main audio console being used for the broadcast.

Power
DJ mixers have an AC mains plug that is connected to the wall to supply electric power for the unit. Some DJ mixers can take batteries, which enables users to mix songs outside or away from electric power sources, with the output being plugged into a portable boom box or other battery-powered sound system.