How to Increase TDA2030 Amplifier Gain

TDA 2030 is a widely used 14W audio power amplifier monolithic integrated circuit in Pentawatt [ package, intended for use as a low frequency class AB amplifier. However some home theater prototype came with

TDA2030 design has a problem of low volume. There are two ways to increase the speaker volume that uses TDA 2030A design. 

1. Simply use a pre amplifier

For low frequency subwoofer amplifier using 2030, you can increase the volume level using a pre amplifier. The best method is use a subwoofer filter board using DUAL LOW-NOISE OPERATIONAL AMPLIFIER - NE 5532. The power supply required for this NE5532 board is asame as that of TDA 2030 requires (12 - 0 - 12) The advantage of using this type of pre-amp is that we get high frequency cut-off as well as necessary gain for the input signal from DVD player or computer.

2. Circuit Change -  Closed loop gain control resistor.

Some circuit board designs usually soldered  a 10K or less value resistor in place of default 22K recommended by the 2030 designers. USe 22K or more instead of 10K to increase the gain thereby reducing the bypass of input to ground. (input should be noise free) However the increasing gain over the reccomended value may result in overheating the IC unless you have  best heat control methods.

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