Vented horn? - Page 2

tb46 · 31st March 2012, 11:28 PM

Hi mdocod,

By definition the throat chamber attaches through the Ap1/Lpt port to the horn @ S2. If you introduce anything but a very short L12 you are modeling a tapped horn with an offset tap, in other words the port does not attach to S1.

Try setting L12 to .01, and add the old L12 to L23. See if that makes a difference.

Regards,

mdocod · 1st April 2012, 12:06 AM

Hi Oliver,

You're right, I have that "messed up."

I went back and tried those changes- not much difference to the result. (small differences like this don't usually cause monumental changes so that's a blessing)

The more accurate simulation shows me that the result is still going to be a far worse sub than the original design was with the sealed enclosure

Eric

abcdmku · 5th April 2012, 03:19 AM

It's built. and at 40 Hz it is a beast, filled the entire basement with solid bass [with only 50 watts]. Something I noticed with this design, is that when I would walk away from the horn it would not phase in and out. Where my vented enclosure would. I just ordered the iNUKE NU3000DSP when it comes in I will give it one watt and do a spl test when I get the time.

kctess5 · 5th April 2012, 04:50 AM

Got any pictures? I'd be interested to see those graphs once you get them. Id be interested to see a front loaded horn with the rear chamber vented, like a lab horn except vented instead of sealed enclosure as opposed to this tapped horn type vented enclosure. Interesting idea, could work out

abcdmku · 5th April 2012, 11:52 AM

I'll get some pictures when I do the spl test, I think I'm going to do that later today.

epa · 5th April 2012, 01:31 PM

nice work ,maybe ur on to something

31st March 2012, 11:28 PM	#11
tb46 diyAudio Member Join Date: Jan 2006 Location: Texas	Hi mdocod, By definition the throat chamber attaches through the Ap1/Lpt port to the horn @ S2. If you introduce anything but a very short L12 you are modeling a tapped horn with an offset tap, in other words the port does not attach to S1. Try setting L12 to .01, and add the old L12 to L23. See if that makes a difference. Regards, __________________ Oliver

5th April 2012, 01:31 PM	#16
epa diyAudio Member Join Date: Apr 2010 Location: amsterdam	nice work ,maybe ur on to something __________________ one good thing about music ,when it hit you feel no pain. so hit me with music.

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1st April 2012, 12:06 AM	#12
mdocod diyAudio Member Join Date: Dec 2011 Location: Black Forest, CO	Hi Oliver, You're right, I have that "messed up." I went back and tried those changes- not much difference to the result. (small differences like this don't usually cause monumental changes so that's a blessing) The more accurate simulation shows me that the result is still going to be a far worse sub than the original design was with the sealed enclosure Eric

5th April 2012, 03:19 AM	#13
abcdmku diyAudio Member Join Date: Mar 2012	It's built. and at 40 Hz it is a beast, filled the entire basement with solid bass [with only 50 watts]. Something I noticed with this design, is that when I would walk away from the horn it would not phase in and out. Where my vented enclosure would. I just ordered the iNUKE NU3000DSP when it comes in I will give it one watt and do a spl test when I get the time.

5th April 2012, 04:50 AM	#14
kctess5 diyAudio Member Join Date: Dec 2011 Location: California	Got any pictures? I'd be interested to see those graphs once you get them. Id be interested to see a front loaded horn with the rear chamber vented, like a lab horn except vented instead of sealed enclosure as opposed to this tapped horn type vented enclosure. Interesting idea, could work out

5th April 2012, 11:52 AM	#15
abcdmku diyAudio Member Join Date: Mar 2012	I'll get some pictures when I do the spl test, I think I'm going to do that later today.