The horn opens very fast, it's more of a wave guide than a horn. Well, at that price nothing can go catastrophically wrong. Or can it? The thing is, because of the wide horizontal dispersion, you're losing a lot of spl and hit a lot more than you really want to. If the neighbours talk to others and they say "I've heard it too!" you get other ppl kinda quickly against you. And if it's not ppl, then it's humans best friend who's maybe behaving erratically. Not what the situation actually improves.
But let's look at the practical side. If you aren't satisfied with the result with these piezos, it's a lot more of work to adapt them to a tube or a different horn, which quickly negates the savings on the piezos. It's essentially "if it works, it's still not what I want but if it doesn't, I have to throw it away" - doesn't sound very appealing (well, at least to me).
The screw-on model piezo drivers can be (re-)used in a lot of things, tubes, different horns, in a speaker, they can be modified a lot easier and you can mount or replace them without any tools. That seems to be a lot better, versatile choice. And to be honest, I don't feel that good in the role to 'sell' you the one type or the other. I don't make any money off of it (nor would I want to) and I've already wrote a ton of ways to realize your "acoustic assault" and reasoning why the one or other would potentially be better choices. It's been an interesting assignment but I am not that excited to write novels just because you want to save a few bucks while it was already said why the other ones are quite obviously a much better approach, it gives the impression you didn't read the posts very thoroughly. That does not make me mad but tbh, makes me lose interest gradually.
On a side note: If the neighbour finds out or got a suspicion, google will gladly help finding this thread - which might make the argument "I didn't know" towards the guys in uniform (or the ones in suits) a bit stale if it might come to that.
But let's look at the practical side. If you aren't satisfied with the result with these piezos, it's a lot more of work to adapt them to a tube or a different horn, which quickly negates the savings on the piezos. It's essentially "if it works, it's still not what I want but if it doesn't, I have to throw it away" - doesn't sound very appealing (well, at least to me).
The screw-on model piezo drivers can be (re-)used in a lot of things, tubes, different horns, in a speaker, they can be modified a lot easier and you can mount or replace them without any tools. That seems to be a lot better, versatile choice. And to be honest, I don't feel that good in the role to 'sell' you the one type or the other. I don't make any money off of it (nor would I want to) and I've already wrote a ton of ways to realize your "acoustic assault" and reasoning why the one or other would potentially be better choices. It's been an interesting assignment but I am not that excited to write novels just because you want to save a few bucks while it was already said why the other ones are quite obviously a much better approach, it gives the impression you didn't read the posts very thoroughly. That does not make me mad but tbh, makes me lose interest gradually.
On a side note: If the neighbour finds out or got a suspicion, google will gladly help finding this thread - which might make the argument "I didn't know" towards the guys in uniform (or the ones in suits) a bit stale if it might come to that.
It's not that I haven't listened or appreciated your input as much as I simply do not understand this type of speaker technology very well. Piezos, compression drivers and horns and the differences between different ones are not something i've ever learned about and it is quite different to making a set of 2 way conventional speakers and a class D amp which is all the diy audio i've done. I am enjoying learning though. I get your point, anything that is not long an narrow will not focus the sound enough and waste the SPL and is therefore not suitable for the intended application. Based on this I will go with the screw on ones. It wasn't about saving a couple of dollars, just saw the graph provided in the review and thought at least I would know where the peak SPL was in the frequency range which I couldn't find with the screw on ones. The reference to the cost was a bit of a joke because what can you get for $4 these days?
I'm not too worried about the police. As far as I can see i'm not doing anything illegal and i'm not actively trying to harass anyone, just standing up for my right to not be harassed by providing some negative feedback. That's why i would really like it linked to the volume of their music.
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The Accoustic assault is what is what I am being subjected to. Its probably getting a bit off topic for the Class D forum so I'll leave it there. Thanks for all of the advice everyone.
Do you mean you think a pipe will not work i.e. the end connected to the piezo would need to be tapered to the diameter of the threaded connection?
Yes and no - it depends on the diameter in relation to the driver exit. Just a pipe only extrends the exit further and after the sound leaves the pipe it more or less disperses like a membrane of the size of the pipe inner diameter. And if you use a drain pipe and remove the rubber seal, the little flange to stick in the next piece is actually enough to get a certain directivity. If you cut it at an angle, it got some kind of directivity too. You get a better result with an step up adapter to the next or 2nd next size but that's not what I was talking about. I was talking about an array (ie 3x3, 4x2, 4x4 etc), which actually is directional even with just straight cut pipes. The tube/pipes got three purposes, mounting and pivoting gets a lot easier, it's a kind of primitive/half assed weather proving so it gets harder for something to get in and it makes the aiming a lot easier.
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