horn boxes

[fritosaregood 0]

I've recently wanted to start making a horn style box, I've build one on accident before, but didnt know it was a horn box. Now im just needing some advice or basic tips on building and tuning of them.

[JimJ 11]

If you're talking about subbass horns, they're usually pretty massive and impractical for anything except home use. Unless you happen to have multiple sheets of 4x8 material laying around when you go to assemble boxes, it's hard to assemble one "by accident"

Now, if you have a full size cargo van or a couple rooms you want to pressurize, now that's a different story...

[ogahyellow 0]

you could try the whornok: http://www.decware.com/whornok.htm

that site also has some other stuff on horns. Some people have apparently tried to use the horns in cars, but I don't know how much it would work as compared to a room. with a car you get serious cabin gain, and the sound doesn't work the same way as in free air.

[///M5 2,833]

What is this going into?

[Acidburn 10]

omghi2u!!1

[Mike P. 0]

Another car horn is the AutoTuba

http://www.billfitzmaurice.com/autotuba.html

[DevilDriver 28]

I think to call pretty much anything you've seen in a vehicle a "horn" (and in fact, what you've seen in houses) is a bit of a misnomer, especially in the lower frequencies a subwoofer typically covers. The size required to behave like a horn at these frequencies is enormous (particularly the size of the mouth). Most of Fitzmaurice's own measurements show this to be the case.

If I ever have the money to do so, I will be building a horn in my truck. Mind you, this will require a blow-through and the enclosure will take up much of the space from the seats to the tailgate.

[ogahyellow 0]

please excuse my ignorance about horns, but I thought the size of the mouth depends on both horn placement and desired bandwith. So In full space you need a mouth where the circumference equals the wavelength. But in 1/2 space you need half, in 1/8th space, an eighth, etc.

Assuming a 30hz horn, (wavelength ~38ft) we would be talking about a mouth with a 12ft diameter in free space, but in a car, with corner loading, we are talking about a much more managable 1.5ft diameter. The idea behind the wornock is that you will also be able to use the car's boundaries to increase the effective length of the horn.

The problem I would see is that you would have a much harder time getting the geometry of the horn correct, and figuring how to fold 9.5 feet into a managable enclosure for a typical car. If i was into SPL, I think it would be worth looking into. But since not, I'll leave it be.

[fritosaregood 0]

can anyone help with advice on building a horn box. ive built one, but i dont have a disign program for that style and it sounded flat on a range of frequencies.

[JimJ 11]

If this isn't for a house, a full size cargo van or SUV I wouldn't bother...

[fritosaregood 0]

its for a house, and a van eventually

[fritosaregood 0]

ok sorry i havent been on here in a while.

by accidentally buildin one, i saw a box called a phase box on the internet a while back and built it. and with later research i found it was actually a horn box,

[buggsson 0]

If you want managable sizes on your horn, try a tapped horn, can be calculated by hornresp (free) much info can be had in the sub section at diyaudio.com

With a tapped horn and the right driver, you are in the border zone for what can be done in a trunk. For a larger vehicle, approx 150 cm long and 50 cm diameter will rock