Posted by Mike.e [ 203.97.2.242 ] on December 31, 2003 at 09:32:42:

Okay!

so this is my horns modeled response above.

what input signals i have made-

220hz filtered pink noise
110hz filtered pink noise

sinewaves from 100hz to 200hz in 5hz increments too.. the HF rollercoaster in response im interested in.

-i know Speaker workshop will work better but i dont have that ready to use,no JIG ,no wm-60 mic, or anything.

which will give me the 'efficiency rating' that is comparable to many subs
and at what distance? its a horn remember. 1 metre,2 metres , aslong as i note it?

Or should i note SPL everywhere in the room at 10cm grid points and compare with john sheerins FEA lol!

Another issue
horn throats of my 30hz horn=

Original way.leaves little clearance.

one way

But how to calculate it,i dont know cone angle to avoid hitting the MDF in the middle.I can guesstimate.

;-)

COOL my password is saved for me! AA seems to forget it...
Cheers!

Replies:

• Re: Horn throat+SPL meter arrived. Measuring methods? - Mike.e 07:31:28 01/01/04 (0)
• Re: Horn throat+SPL meter arrived. Measuring methods? - Adrian Mack 21:00:32 12/31/03 (2)
  • Re: Horn throat+SPL meter arrived. Measuring methods? - Mike.e 21:14:50 12/31/03 (1)
    • Re: Horn throat+SPL meter arrived. Measuring methods? - Adrian Mack 03:42:51 01/01/04 (0)
• Re: Horn throat+SPL meter arrived. Measuring methods? - Wayne Parham 15:27:06 12/31/03 (2)
  • slow sine + dont lose your hearing :-P - Mike.e 20:56:08 12/31/03 (1)
    • Re: slow sine + dont lose your hearing :-P - Mike.e 21:01:12 12/31/03 (0)
• More notes - Mike.e 10:13:29 12/31/03 (1)
  • pic - Mike.e 10:13:50 12/31/03 (0)