Building a passive crossover for a speaker involves designing a network of passive electrical components (resistors, capacitors, and inductors) that split an audio signal into different frequency ranges and direct those ranges to the appropriate drivers (such as woofers, midrange speakers, and tweeters) in a multi-driver speaker system.. Here the simple passive schematic diagram of… Read More »
This is a simple active speaker protector circuit which has a very important use, expecially to protect the loudspeakers of a audio system. It prevent the speaker from noise sound when we turn on the power amplifier. The circuit drives the speakers after 3 to 10 seconds so that the source of the same stabilizes… Read More »
This is 2 way speaker box design for audio system. I’ve used this design for my home audio system, the sound quality is good. Two speakers used for this speaker box that are tweeter / high frequency speaker and woofer / low frequency speaker / subwoofer. Alternatively you may replace the woofer with fullrange loudspeaker.
Here the 20 band graphic equalizer schematic diagram. This is stereo graphic equalizer, it should be 2×10 channel equalizer. Graphic equalizers device are popular with both domestic users and professional users. This equalizer is has simple design and easy to construct. It has no coil. It uses 15V split / dual polarity power supply to… Read More »
This is the circuit diagram of power amplifier 45W using power uPC 1230 as the main component. The pre amp head has been added in the circuit using uPC 1032. This is an popular old circuit for hobbysts and the 45 Watt amplifier circuit should be working fine since the PCB already on the market… Read More »
9 Volt Siren Kit — CK1207 A simple 9 volt siren kit with a surprisingly loud output. Uses voltage controlled oscillator; comes with a half-watt 8 ohm speaker. Good as a sound module to attach to an alarm system, etc.
This is the circuit diagram of 70W OCL power amplifier with output power of 70 watts single channel. It uses power transistor TIP2955 and TIP3055 as main component. The power supply used for this amplifier is a symmetrical / dual polarity power supply with output voltage 25V – 32V. This amplifier dan be used to… Read More »
This is the circuit diagram of laser communication system that transmit the sound or music signals by way of a laser beam. The intensity of the laser beam varies together with the amplitude of the sound signal. The variation within the intensity of the laser beam is converted into a variation in the voltage level… Read More »
The following schematic diagram is a small surround sound decoder circuit. You may use this decoder surround sound systems for your home audio system to make the audio system sound more “alive”. Parts List: R1-2-7-8-12-13-18-19-20=47Kohm R3-4-5-6-21-22-34-35=10Kohm R9-10-11-14-15-16-17=15Kohm R=23-24-25-33-36=100ohm R26-27-28-31-32=100Kohm R29-30=5.6Kohm C1-8=47uF 25V C2-7-9-14-23=47nF 100V C3-6=1uF 100V C4-5-10=33pF 100V C11-12-15=10uF 25V C13=82nF C16=18pF 100V C17=100pF mini… Read More »