Thanks to parts express you can now build your very own hifi amplifier for considerably less than what one would cost you from a name brand hifi amplifier company. Get a grip on the gainclone universe.

How To Make Car Speakers Louder Without An Amplifier
How to build a car amplifier. Depending on your configuration of choice you need the parts. For the input circuitry i decided that it was best to use a high pass filter followed by a low pass. If you want to build your own amplifier then this is for you. The amplifier is one of the simplest i have encountered and it gives out a decent sound. However your car may not be doing your custom audio system justice and your radios built in amplifier might not supply enough power to the new components. Watch the video to see just how.
Building your diy amplifier luke the warm input circuitry. Make your first serious amplifier step 1. In this tutorial we are going to build a stereo amplifier that you can use to play music from for example your mobile phone or your computer. Im not an audiophile and not an expert on amplifiers either. Tighten securely using pliers while keeping the machine screw from turning by holding a screwdriver. This is why you might need an external amplifier or amp as your audio setup becomes more and more elaborate.
M41 i only used it because i had it. For the triangle generator i used an lmc555 which is the cmos variant of the famous 555 chip. Only a few components are. Build your own amplifier. Drill a 18 or close hole in each corner and mount a bracketstrap to each hole using a 8 machine screw washer on the top amp side and on the back side use a washer and nut.