This is Preamp tune board,and with Treble, Bass and, left-right channel balance and volume control; components are carefully selected, and the 4558 op amp with high cost performance can be used instead of the 5532, and the circuit board wiring is reasonable. Low noise, beautiful component layout, very suitable for enthusiasts DIY
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Working Power: AC double 12V-15V(transformer)
Op amp type: NE4558
Product size: 15.2*7*2.8cm
Potentiometer specifications: 15mm / 20mm
With treble / bass / balance / total volume control