pre-amplifier

Bass volume control circuit: This is a bass volume control circuit diagram for the amplifier. every amplifier needs this type of circuit to make a good sound. this diagram does not require any voltage. and it’s only for the Bass and the volume. it’s a simple diagram. it’s also a …

DIY bass tone circuit: This is a DIY bass tone circuit for the audio amplifier. this circuit makes the sound the best quality. every amplifier needs this type of circuit. this circuit needs 15+0+15 voltage.  Diagram  We have another post for you. like Stk 4101   repairing amplifier, transistor circuit diagram of 2sa1943 …

Pre-amplifier for bridge mode: This is a Pre-amplifier for bridge mode amplifier. this circuit needs to make the amplifier in bridge mode. when we need dual power in one channel, we have to use this circuit. left and right channel makes output together. that time no need for the ground. …

Fnord effect discord: This is a guitar Fnord effect discord circuit diagram. this circuit needs 9 voltages and 2 amperes. there is a switch to mute the sound. it’s a mono-circuit diagram. it’s also like pre-amplifier  Circuit diagram   We also can use another PNP and NPN transistor in this …

Guitar Effect circuit diagram: This is the Guitar Effect circuit diagram. this board is for guitar sound effects. It runs with 9 to 12 voltages. it’s also like a pre-amplifier. we can use 9 9-voltage battery for this board. it has 3 vol.  the component list      We have …

How to make bass tone: How to make a bass tone. this is the equalizer circuit for the amplifier. this circuit does not need any voltage to run. it’s a passive circuit. this circuit requires a pre-amplifier to make a good performance. it’s a mono-circuit diagram. if we need stereo, …

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 …