pre-amplifier

Audio mixer circuit: This is an audio mixer circuit for the amplifier. Sometimes we need many inputs in an amplifier. then we can use this type of diagram to control all input. here, there is no need for any voltage. Equalizer Here have 6 input and 1 output socket. this …

Equalizer circuit diagram 7band: This is an Equalizer circuit diagram 7band. this board is for mono audio. if need a stereo then have to use a two-circuit. here no need for any voltage because it’s a passive circuit. every amplifier needs a good-quality graphic.  All voll will be 100k and …

Low Mid and High Circuit Diagram: This is a Low Mid and High control circuit board. this diagram is so easy and simple. it’s a mono-circuit diagram. it’s without a pre-amplifier circuit. this circuit does not need power because it’s without a pre-amplifier. it can control low frequency, high frequency, …

Turbo Bass Circuit: This is the Turbo Bass Circuit diagram. this circuit makes the extra bass. This is also a pre-amplifier. we need this type of board for the subwoofer. low-pass filter also for subwoofer but this circuit is different board. this circuit works with 2.0 stereo sound but the …

Mid-low high circuit diagram: This is the Mid-low high circuit diagram. this is one of the best single-voltage pre-amplifiers. here used 9 voltage. this is a mono board. if we need stereo then we have to use dual board for the dual side.  Component list: P1=0.022, P2=0.022, P3=100pf, P4=0.1, P5=0.01, …

Echo circuit diagram: This is the Echo circuit diagram for the amplifier. it’s a mono pre-amplifier. it’s needed for the microphone section. this circuit runs with 12 voltages.  Component list:   P1+P2+P5+P6+P7+P8=104. P3+P4=470. P9+P10=2n2. V1=20k. C1=47uf/50v. C2=1uf/50v. R1=22k. R2=4k7. R3+R4+R6+R7=10k. R5=15k. R8=220/2w. Z1=5.1v.  transistor circuit diagram of 2sa1943 and 2sc5200 Build …

Midrange control circuit diagram: This is a midrange control circuit diagram for an amplifier. this circuit is only for the bass control. every amplifier needs this type of pre-amplifier. without this circuit, the sound can’t be nice. it’s small and simple to make. this is a mono board. if we …

Bass control circuit diagram: This is a bass control circuit diagram for an amplifier. this circuit is only for the bass control. every amplifier needs this type of pre-amplifier. without this circuit, the sound can’t be nice. it’s small and simple to make. this is a mono board. if we …

Simple preamplifier circuit:  This is a simple preamplifier circuit diagram. this diagram for the amplifier. this diagram makes sound boosted. some of the amplifier has low sound amplifiers we can use this diagram to increase the sound. this diagram runs with 12 voltages. it’s a mono pre-amplifier.    Component list …

Bass tone circuit collection: This is a Bass tone circuit collection for the amplifier. here we can get some circuit diagrams for the amplifier. every amplifier needs a sound controller. all circuits are controllers for the amplifier. some circuits need extra power some do not need power.  5 band equalizer …