How to make amplifier at home easy with 4 transistors D718, 12v source, make amplifier simple more powerful. Uses up to 3 bass speakers. The circuit has been carefully tuned I opened up the volume, so the sound could shuffle, adjust the volume down, the sound would be better. My project Thank you. Please share the video, so that my channel will grow a little better. Thanks for watching Channel: Alfred Google+: https://plus.google.com/u/0/101341691653861442619 facebook: https://www.facebook.com/thanhhai.bui.58910