Master Amplifier
what does the master, bass and treble button are for?
im talking about a yb15 bass amplifier
The master is the main volume. You will probably also have a knob labeled gain - these two control the volume at different stages of the amp (gain: preamp - master: power amp). Some amps have only one volume, and this can be called gain, master or volume.
Bass controls the lower frequencies of the amp - treble controls the higher frequencies. Just play the amp with an instrument, turn the knobs and you will soon hear what they do - you won't ruin anything 
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 vintage 1979 MARSHALL JMP MK2 Lead Master Volume 50 watt tube amplifier combo US $1,795.00 |
 Marshall Master Volume Guitar Amplifier 1987 2203 2204 1959 Manual US $19.99 |
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 Peavey Rock Master GT10 10W Guitar Amplifier GT 10 Mint 203423 US $49.95 |
 Fender Band Master® VM Head Guitar Amplifier US $699.99 |
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