ELECTRONIC CIRCUIT

Preamps Microphone Mixer circuit
Choosing a good power amplifier is very easy but to choose the perfect microphone preamps is not easy, because the adjustment of sound pressure level (SPL) with volt level (dBu).
Matching microphones and preamplifiers requires proper research and measurement, so to do this does not depend on your budget – but on [...]

4 channel Audio Mixer circuits using IC CA3048
R1 500 k Ω      C1 0.47 µF      U1 CA3048
R2 820 Ω         C2 50 µF         U2 CA3048
R3 100 Ω         C3 0.008 µF    U3 CA3048
R4 8.2 k Ω       C4 0.008 µF    U4 CA3048
R5 8.2 k Ω       C5 50 µF
R6 100 Ω [...]