Ok, so I know that doing this is generally wrong, frowned upon, and "ghetto" for the lack of better term. But my question is this. Is there a "right" way to do this, or "proper" way to do so. If so, what equipment should be used. Any product recommendations? For those not understanding what I'm referring to, is when people have, generally, weather proof PA Speakers mounted externally of their vehicles, playing music. Again, please skip the whole, "this is wrong and retarded" phase, and just provide some good advice. And no, don't do it, isn't the advice I'm looking for lol. So from experience, what I have seen people use is those PA speakers, that are mounted to cop cars, and they splice those into an car audio amplifier, and the horns are facing downward. For whatever is recommended, I know that the speaker itself has to be waterproof, something like marine speakers. I don't want to use marine speakers as they don't, generally, have the same output as an PA Horn, tho more clarity. Anyways, any advice would be great!