I'm trying to make a custom PA system for my car, but I am confused about what type of amplifier I might need, or do I need one at all?
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 reason I think this is simply because the PA speaker is so much bigger than the cheap little speaker that came with the shirt, and the little sound unit amp in the shirt is run off 4 AAA batteries, whereas the Coga PA system the horn is coming from would run off 12 volt.
Couldn't find any specs on the shirt, but supposedly the Coga system would output 40 watts RMS 50watts Max to its speaker, so I'm guessing the speaker can handle 50 watts, and I just need to find a way to bump up whatever output is coming from the shirts sound unit, up to 50 watts. But then, I really don't know anything when it comes to audio and amplification.
Can anyone help?