Knob
volume, balance, treble, bass
Operating voltage
DC 12-24V or AC10-16V
A types
Potentiometer Separated version . Potentiometer length 300mm
B types
Potentiometer fixed version. Potentiometer spacing: 25mm
Types of Amplifier
Preamplifier
product name
Op-amp Hifi Preamplifier Ne5532 Audio Tone Amplifier Board Preamp