The LM358 has two op-amp module, you may build stereo audio pre-amplifier using single LM358.
Component list of simple preamp mic circuit:
R1, R3, R4 : 10K
R2 : 1K
R5 : 100K-1M Potensiometer
C1 : 0.1uF
C2 : 4.7uF/16V
IC1 : LM358 dual op-amplifier
Mic : Electret Microphone
sumber skema-amplifier.blogspot.com
