Midrange Horn Sanity Check

[CLS]

Hi there,

For the "on-planning" projet, I changed my mind on the OB midrange to a horn.

This will be a large throat, large mouth, and short horn.

Here are some screen shots:


The driver is TAD TM1201, I'm not so sure about the Cms and Rms. I can not find proper unit in the data on hand. And for a 12"er, the 4.8g Mmd is incredible!



Short and wide, almost conical, 100cm by 60cm mouth, large throat, only 50cm long. More like a "wave guide" I guess.
Maybe I'll try open back....



Pretty good on "paper".


So, is it OK? Any pitfall?

[Frode]

I don't get a graph even close to yours. When you load data into Hornresp, start with Sd, then doubleclick on the Cms field and put in what Hornresp asks for. You can do this with Cms, Mmd, Bl and Rms. With the numbers I've used, the Mmd of the TM-1201h is over 50g, more then 10 times your number.

Frode

[CLS]

Thanks for reply

Actually I also doubt that feather Mmd. When put in some "reasonable" figures, say 60g, the high would drop dramatically.

But, in reality, this kind of big throat horn tends to give pretty good bandwith since much of the direct sound could come out without any restriction. (this horn is so short)

I've never seen the FR of this driver. I guess the raw driver probably has a rising response, thus a pretty good balance with the help by horn on the lower end.

[Frode]

Originally posted by CLS

But, in reality, this kind of big throat horn tends to give pretty good bandwith since much of the direct sound could come out without any restriction. (this horn is so short)

I've never seen the FR of this driver. I guess the raw driver probably has a rising response, thus a pretty good balance with the help by horn on the lower end.

Yes, Hornresp doesn't show the whole picture(or FR). It would probably work well.

Frode