adjust

aluminum

amplifier

appliances

audio

blue

button

close

control

crank

cranking

device

dial

electric

electrical

electroacoustics

entertainment

equipment

finger

focus

hand

home

illuminate

knob

level

light

listening

loud

man

max

min

motive

music

night

off

old

people

power

press

radio

relaxation

retro

rotate

selective

silver

song

sound

speaker

stereo

system

technology

turn

volume