PA 100-Watt Public Address System – Dual Horn Speaker & Handheld Microphone for Police, Fire, Tow, and Emergency Vehicle Communication

I recently got into STL products, and so far I absolutely love them. For this specific item, it’s loud, it’s clear, just what you need. The previous system I have was alright, the pa was hardly working brand new, but after I got this STL PA, I have no complaints. I highly recommend this system, it’s easy to use, easy to setup, just a great overall product.

This is my second one for another vehicle. No Siren to get you in trouble. I recently had to change out the cheap fuse holder on the older one. The new one is better, BUT I changed it out anyway to a Mini ATC style. I did not buy their horn this time. I bought a 200W Xprite Compact. Yes It's freaking LOUD !

Like a lot of other people, I had to rip it apart to reattach the horn switch, while it was easy to do, it shouldn't have had to be done. However, now that I have it fully hooked up, I LOVE it!!!! It's pretty loud and serves its purpose.

I like the PA feature--nice and loud. I dislike the two horns--they don't sound like the commanding dissonant electronic air horns used by emergency vehicles. The horn tones with this unit are too pure to really get people's attention, plus their pitch is too high and could benefit from lowering about an octave. If STL would lower the tones and make them more dissonant/aggressive (like the Lamphus SoundAlert horn, which has the ideal tone), then this unit would be perfect. I ended up using this unit just for the PA system and installed a separate switch and speaker for the Lamphus horn.

I’ve had one of these for about 9 months now. Great if you’re only trying to warn pedestrians, but completely ineffective for trying to actually move traffic. Not loud at all, and can’t be heard from inside other vehicles. Also, the PA feature on my unit quit working weeks ago.

The mic is way bigger than I expected (in a good way) and this thing is LOUD! I see some reviews saying it isn't, but that's likely due to the speaker. Anytime you have a PA, always use a cone shaped speaker. Those are always louder than the flat boxxy speakers. I previously had a flat speaker with a system that had a siren/ light controller combo with a hideaway corded remote. You could barely hear it. The box on this thing is extra heavy and well made. Also face your speakers into the engine bay or wheel well or even the fender. This will amplify it like putting a speaker in a box. I have a 2018 Tahoe and faced mine into the engine bay by the frame. It's so loud, with the door and hood open, I get feedback.

Horrible product. Cheaply built. The horn button was rattling around inside the device when it arrived. I had to fix it. The microphone is equally as cheap and the PA didn't work at all. Made a bit of noise but otherwise the microphone was completely useless. The 1 star is simply because the horn was the only thing that worked.

I found that it's loudness is highly dependent on thr quality of the speaker. My speaker came out of a totaled police cruiser and it is very loud. The PA100 was easy to install and worked flawlessly. The one CON that cost them a star: Even while off, this unit draws current. It WILL run down your battery after a few days. (Yes, I learned the hard way and had to get an embarrassing jump start from AAA.) So don't wire directly to the battery like I did. Install an on/off switch or run to a circuit that is not powered when the ignition is off.