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At this time I present a series of amplifiers that use IC TDA2030, but this series is equipped with a tone control. Tone controls include Bass, Treebel, and Volume. Power amplifier and tone control has been put together in a single PCB. As well as its power supply circuit was also used as one with the power amp, and tone control. Making it easier in the installation and will look neat. Schematics Layout PCB PCB design This amplifier is a mono amplifier type, can be modif for guitar amplifiers. If not coupled amplifier (mic preamp) then you must deactivated potensio treble and bass, why? because if not using a mic preamp and still maintain potensio treble and bass sound input (input) from the guitar will not or the maximum discharge is not tight on the speakers. So you must deactivated a way to decide which directly connected capacitor with the tone control circuit, and capacitor were connected directly to potensio volume and input jack.

This schematic is great for those of you who frequent of use IC TDA2030 . In addition to the simple schematic  is also very clear , in modification accurate enough to make a sound that is more clear, soft , and loud. And if you interest to try this schematic. See this circuit , datsheet ic TDA2030 and TDA 2040 , and IC TDA2030 equation below : Datasheet IC TDA2030 Vcc                = 6-18 V Pout               = 14 W RL                  = 4 Ohm Ft                   = 20hz - 20Khz Icco                = 40 mA Package         = TO-220 Manufactered = TELEFUNKEN Datasheet IC TDA2040 Vcc                = 3-20 V Pout               = 20 W RL               ...