英文關鍵字
amp
amplifier
amplify
appliance
audio
background
begin
beginning
black
blinking
blue
blues
booting
closeup
concert
connection
cord
device
distortion
down
electric
electrical
electro
electronics
energy
equipment
finger
guitar
jack
knob
led
level
light
loud
mix
panel
plug
power
red
sound
standby
studio
switch
symbol
technology
turned