The Siren Board

FahmiRBLX wrote: ↑

Thu Feb 22, 2018 7:53 am

Well, the first questionis not to be meant to be so, but to increase its dB output.

It would most likely explode if you tried to do that.

the relief would blow, and blowers would be rendered ineffective.

Just remember you are putting air into a hole about the size of a piano key. It’s already almost at the maximum amount you can force through it with one blower. Once you exceed that amount you are basically looking at actually decreasing the DB output and/or damaging the siren.

realistically is the chopper would not turn, being stuck open, the relief would blow, and then the siren might be forced to pieces bc of the pressure.

I also should add this: the sutorbilt legend series blower has varying pressure and CFM at different RPMs. There is a reason the 4M screams along and the 6M basically idles and causes that pulsating sound. If you were to run the 6M up to the same RPM that the 4M runs at, you’d have a lot more pressure going into the siren that would most likely, at the least, pull the relief valves. I do believe the RCM1 panel can dictate how many RPMs get sent to the motor based on the model... or there may be a setting on the motor itself... the thing I remember though is what a difference those stinkers made at the same RPM. So now that I’ve kind of explained that I hope it can put in perspective what THREE blowers would do. Not to derail a topic or beat a dead horse but... there you go.

EDIT: oh and also for the record: the 6M still shovels MORE air into the siren AT ESSENTIALLY IDLE than the 4M at it’s screaming pace.

Alright. So, what can I do to increase the dB output without making blantant change onto the head? (e.g not enlarging the horn)

FahmiRBLX wrote: ↑

Sun Mar 04, 2018 2:52 am

Alright. So, what can I do to increase the dB output without making blantant change onto the head? (e.g not enlarging the horn)

Fitting a 5M if there wasn't one already.

Yea that’s about all you can do. Also making it single tone can bump it up a dB or 2. There is also very loose evidence amongst a few bolt enthusiasts that say that on a higher tap, it does maybe get a decibel or 2 more because the port is “open longer allowing more air to escape.” But I don’t think anyone’s studied it in depth... the other thing: why would you want to increase it? Let me tell you boss, I recorded a 5M single tone in Nebraska. When it was pointing away, I thought “hmm... doesn’t seem that loud.” But when it pointed right at me, the ground shook like there was an earthquake. (Well maybe not THAT crazy but I could hear my shoes slapping the ground...) And the siren was mounted pretty high and I was standing pretty far back.

coastalsyrolover wrote: ↑

Tue Mar 06, 2018 3:40 pm

Why would you want to increase it?

Since I live in Malaysia and having a plan to own a 1003, I lived in an area in which has no nearby sirens AT ALL, and I wanna use my siren to warn on, worst natural disaster can ever I found here is storm, possibly up to a severe one. I've already seen several trees got uprooted, cr4ppy billboards toppled down, etc. Oh I just remembered in a WhatsApp video that has a Highwayside Rest Area's roof flew in a storm, and if I serve it right, the ceiling fans swayed violently and lights got flown, probably.

So warning everyone's can be also a deal and also as an enthusiast, though. But my main reason of installing that is for warning, obviously.

Sure sure. But keep in mind they are pretty loud already. Sure there is maybe a siren or 2 that are louder close by, but the dual tone bolt sounds like no other siren that I’ve heard and the single tone one carries on forever. (Not literally...)