amplifier
audio
bar
cable
communication
concert
connect
connection
console
control
desk
device
digital
electrical
electronics
end
engineering
entertainment
equalizer
equipment
fader
input
interconnect
jack
level
line
loud
metal
mix
mixer
mixing
music
output
panel
party
player
plug
professional
pub
rear
receiver
record
restaurant
socket
sound
stereo
studio
technology
volume
wire