I'm trying to make a custom PA system for my car, but I am confused about what type of amplifier I need, and if I am able to make one with a basic schematic and minimal parts, or buy one.
I'm wanting to take the main sound unit out of a "personal soundtrack shirt" like this http://www.thinkgeek.com/tshirts-apparel/interactive/a5bf/
but remove the speaker from the shirt and replace it with a PA horn.
I already have a pa horn that came with a "coga pa system" http://www.cogapa.com/
I actually have already hooked up the sound unit from the shirt, to the pa horn, just by simply cutting the audio output wires, and hooking them to the wires of the PA speaker, and it does work, and is louder than I would have expected, but I don't think its nearly as loud as its potential. The sound unit is only running off 4 AAA batteries right now, thats only 6 volts, and I believe the pa speaker is probably 12 volts (at least the normal PA amp that normally goes to that pa speaker is a 12 volt device). According to the specs the amp that normally outputs to that PA speaker is a 40watt RMS 50watt max. Unsure if that is the max of the speaker or not, but I believe I need to find a way to increase the output of the sound unit from the shirt, from whatever it is, to 50 watts.
Can anyone help? Thanks.