Audio power amplifier design professional#
Audio power amplifier design series#

Audio power amplifier design professional#

REVAMP1680 is a professional 16-channel digital power amplifier with 16 x 100 watts output power 4 ohms, but the unit is also bridgeable to 8 x 200 watts 8 ohms. When the priority input has been activated, 24V DC outputs will be available to activate priority relays of loudspeaker attenuators or other devices. The volume of the program input can be set at the front and the volume of the priority input at the back of the amplifier. The PA240P comes with a removable metal protection cover so that unauthorized people cannot change the amplifierвЂ™s volume, bass, and treble tone controls from the front panel.

The bass вЂ“ treble tone control guarantees an excellent sound experience, even in tough acoustical conditions. The amplifier has an input for background music (with link through) and a priority line input (for paging or evacuation messages), which can be activated by contact closure. The unit is able to drive 4 ohms or constant voltage loudspeaker lines (50 вЂ“ 70 вЂ“ 100 volts). Besides high reliability and the basic functions of a power amplifier the PA240P excels above similar products by the inclusion of its extra technical features, possibilities and protection. It is the device to build larger professional industrial sound applications. Enclosure the complete circuit in small box and connect the primary winding to mains supply.The PA240P is a fully equipped 240-watt constant voltage power amplifier that can meet all of your requirements.Variable resistor VR 2 should be adjusted to about 11в„¦.Audio input connector (CON3) and variable resistor VR 1 fit on the front panel of box.Connect all the component as shown in circuit diagram.Adjustment of the Circuit |В Best Audio Amplifier Circuit This network reduces the high frequency noise available at loudspeaker by forming a low-impedance path. One RC network formed using resistor R 8 and capacitor C 11 is connected across the loudspeaker LS 1. Transistor T 1 and T 2 is used to drive the loudspeaker capacitor C 10 is used here to block the DC signal. This bias current set by these resistive elements solves the problem of turn on base emitter drop of transistors T 1 and T 2, this current is also used to keep the transistors T 1 and T 2 active in-order to produce the output power when either load is connected or not. Two diodes D 2 and D 3 do the job of multiplier. R 2 and R 5, where bandwidth of the amplifier is set by resistor R 5 and capacitor C 8.Д«ias Current is set by two resistors R 6 and R 7 which is further adjusted by variable resistor VR 2. Gain of the amplifier is set by two resistors i.e. Electrolytic capacitor C 6 reduce the low frequency noise and min-frequency noise available in power supply, whereas ceramic capacitor reduces high frequency noise available in power supply lines. Two capacitors, one electrolytic capacitor (C 6) and one ceramic capacitor (C 7) connected in parallel used as de-coupler i.e. Capacitor C 5 is used as bypass capacitor. A voltage divider network designed using resistor R 3 and R 4 is connected to non-inverting terminal in order to supply Vcc/2 voltage i.e. Variable resistor VR 1 is used to control the level of volume and capacitor C 4 block the DC signal. Input audio is given to inverting terminal of IC 2 (pin 2) through variable resistor VR 1 and electrolytic capacitor C 4. The amplifier section is designed around operational amplifier IC LME49710 (IC 2). Audio Amplifier Section |В Best Audio Amplifier Circuit Pure 12V DC is available at connector CON2.

Audio power amplifier design series#

A LED is also connected with series current limiting resistor in order to indicate the power supply whereas resistor protect the diode from over voltage and current. One diode 1N4007 (D 1) is connected across the output pin (pin 3) to input pin (pin 2) of IC 1 as shown in circuit diagram of power supply unit in order to protect the IC from reverse voltage. DC output available at pin 3 of IC 1 is filtered by capacitor C 3. This pulsating DC is filtered using 1000 в™џ electrolytic capacitor (C 1) and is given to the input of the series linear voltage regulator IC LM7812 (IC 1). This 15V AC is given to input of bridge rectifier BR 1 and pulsating DC is obtained from output of rectifier. Mains line input is given to primary winding of the transformer which step-down the voltage to 15V AC. Power supply unit is designed around step-down transformer, rectifier and series voltage regulator. Power Supply Unit |В Best Audio Amplifier Circuit

The circuit of audio amplifier need separate power supply unit thus, we are also going to show the power supply circuit and designing method. working frequency: 20 Hz to 40 KHzДescription of Best Audio Amplifier Circuit Specification of Best Audio Amplifier Circuits