I bought this yesterday and installed it myself in about 1.5 hours. Not being a professional installer, I was shocked at how easy it seemed. I didn't have to read the instructions. A bit of common sense will help you figure out that red is power, black is ground, and the other two wires go to the speaker. I've paired it with a 100-watt XPrite siren, so it's almost a double check. But for two. I love it. Sounds very good. It's really loud! Not shrill, but definitely audible from miles away. Nice tones, not a fake electronic toy. It's authentic and dizzying. I'll have to go back and update this once I've hooked up my flashlights to this system and lived with it for a few months. But so far the first 24 hours have been fun! As for PA, I liked it, but not to my ears. it's not the clearest. It works well, just a bit static, but that might be due to the $60 XPrite speaker I shipped with this system. Would I buy again in the future for other vehicles for my security company. This is not a waste of money. Click on it and buy. You won't get upset. For the money is the top! Update 07/22/19 PA cables were not soldered to the best of our knowledge and belief. But now it sounds great, it's really clear!
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