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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