adjustment
amp
amplifier
amplify
audio
balance
button
channel
close
closeup
console
control
controller
detail
device
dial
electronic
entertainment
equipment
hifi
knob
levels
loud
macro
metal
modern
music
numbers
panel
play
player
power
radio
receiver
scale
shiny
silver
slider
sound
speaker
stainless
steel
stereo
system
technology
tuner
tuning
up
volume