Will the images be back, or is there some problem keeping me from seeing them? All I see is [img].

ASC recently posted a video to their Facebook page of them testing an I-Force 3200 next to a Clarity 832. It looks like they decided to switch from the 4 horn per module to 8 horns. This was a good move IMO considering that the angle of sound dispersion that these JBL horns have is pretty low. It's...

Are there any photos of the inside of a Whelen rotator? I'm interested to see what the internals look like, and how the limit switches are implemented.

I've synthesized some tones for DIY electronic sirens, which are as simple as lashing up some horn speakers to an amplifier and a computer's sound card. If you're in an area where you can make some noise, like out in the country, you can blast these out with impunity, but if you're in a city you nee...

I honestly think the idea would be great, but for very small areas. It reminds me of the homemade siren (cue joke here) I built a decade ago. I just don’t see that functioning well unless the sales pitch is one every couple hundred feet. Perhaps that is how it’s being marketed? Idk it just seems li...

Follow-up: So I purchased a couple of the PRV WGP275Ph horns, and they are okay, but the driver itself is not very robustly made - the plastic housing on one arrived damaged - causing the motor and diaphragm to fall out. I kept looking, and on eBay I found the PRV WGP270Ph (not sold at Parts Express...

I found these recommendations from PG&E for temporary service poles: 20 ft above ground, 4 feet below ground. This means whatever the exposed length of the pole will be above ground, you need to have 1/5 of that length below ground. You need to dig a narrow hole with a cone shaped bottom to keep...

Also, a clone of the square Selenium horn, with the low cost plastic body driver. (PRV was started by former Selenium employees after Selenium was acquired by Harman) https://www.parts-express.com/prv-audio-wg275ph-1-horn-loaded-midrange-8-ohm--294-2797 Edit: And because I've really latched onto thi...

And if you want, you too can also play with siren drivers. Here's one you can buy that is a phenolic-diaphragm horn midrange driver on a short horn (instead of a long one), much like the one used by ASC, although more cheaply made out of plastic instead of cast aluminum (ASC's horns - the JBL Seleni...

We really need a video at distance. But the meaningful take-away is that even for horn-loaded systems, there are differences between types of systems that are well suited to siren warning and systems that are well suited to voice announcements. Horns that are most efficient for siren warning are les...