Ever think of building a Cornu Spiral horn? Now you can!

[bonjonno]

wo Cal, that's cold! Ur Canuck thermometer may be off tho; 32.7 here in paradise. My buddy in LA was just telling me how they can't crack 70 there.

 

[xrk971]

LOL, here in DC, we just hit 90F (32C) yesterday and my A/C unit decided it was time to stop working.

 

[Cal Weldon]

You guys really ought to catch up. Using ºF never did make sense, but if you must, it's 60F here and climbing.

 

[bonjonno]

oh yeah, C degrees. My apologies. We are way behind here...

 

[xrk971]

There’s more resolution with F (almost double at 9:5) and no need to use a decimal.

 

[phivates]

Fahrenheit was a subjectivist, basing his silly scale on human experience. No one of the slightest scientific bent would ever use such nonsense.

 

[Cal Weldon]

There’s more resolution with F (almost double at 9:5) and no need to use a decimal.

Found that silly rant on Google? I sure did. The guy is a... uh, a funny guy. X, you should know this sort of thing with your background. Seriously though, Your body can tell the difference between 19º and 20ºC in air or water but not necessarily so with 1ºF in air. Water? Maybe. So why do you need it to be finer than that? Besides you Fahrenheit people don't mind decimals do you, 98.6º anyone?
My car climate system increments in 1ºF or 1/2ºC so I have finer control with C than with F.
Shall we continue?
Nah, this is way OT.
Cheers.

 

[phivates]

I knew we could count on you Cal

 

[xrk971]

My home thermostat is in F and I can feel the difference in how cool the AC is between 75 and 76 that’s for sure.

Actually, in good old Amarhricann industrial labs like GE, Boeing, Lockheed Martin, Ford, GM, etc they still use F on experimental test stands. Inlet air on high performance gas turbine engines is 1050F not 565.5C. But we are way OT. I like my miles and Fahrenheit.

Did you know that a mile is a metric unit? It’s 1000 paces of an average Roman soldier’s stride. Pace is 2 steps (every other step). Walk a 1000 paces and it’s about a mile. Something to be said for that. I happen to like it because I have the exact Roman soldiers pace 5.28 feet.

 

[phivates]

My foot measures 304.8mm.

 

[Cal Weldon]

And apparently there is some sense to the Fahrenheit scale. If you mix equal amounts of ice, water and ammonium chloride you achieve 0ºF. Practical, right? I mean who doesn't have a bag of ammonium chloride on a shelf somewhere?

Oops, I did it again.
BS

Fred, you have big feet. Your wife must be happy.

 

[phivates]

Cal have you talked about your big Cornu somewhere?
Or are you not inclined to brag...

 

[phivates]

OK I found your big one. I'll have to stick to something in the 30 - I mean 76.2 - size. Is there a Vas/Qts/Fs code for sizing these re: volume?

 

[mondogenerator]

Actually, in good old Amarhricann industrial labs like GE, Boeing, Lockheed Martin, Ford, GM, etc they still use F on experimental test stands. Inlet air on high performance gas turbine engines is 1050F not 565.5C.

Don't be so sure.

Where I work...degrees Celsius is Good Enough

But MPH still makes more sense to me than KPH

 

[Cal Weldon]

In Canuckland we abbreviate it as km/h. Why does it not make sense to you?

 

[Cal Weldon]

Fred,
xrk is my source for size and depth. These boxes are not perfect but they are very forgiving. Just tell him the driver and hopefully he can help. Being a four mouth horn you might want to consider something with a lower Q.

 

[Cal Weldon]

Degrees F will always have its place. 45 years after we converted to Celsius, 95% of people here set there ovens in F.

 

[Doctor Why]

I prefer Kelvin (K)


"Hey Boss, it's 300 degree Kelvin - way too warm for working. I go home..."

 

[gazzamongo]

Thinking about cornu's as rear and ceiling speakers in a atmos set up. Pondering if this front horn on a faital pro 4re32 , 27" inch cornu , would work.

Speaker Plans for ES-300 Front Horn – Joseph Crowe

 

[scott68]

conundrum: Cornu vs T-line

I don't understand why two different length lines in a cornu work so well but all I have heard is that only one line length in a transmission line works. Does a cornu have two "humps' at different bass frequencies?