Horn for Neo hot spot

brsanko · 5th May 2009, 08:45 PM

This driver seems to model exceptionally well in a rather small horn design. http://www.mcmelectronics.com/produc...S5N-8-/55-1906. Here's my drawing.

GM · 5th May 2009, 11:16 PM

Your link appears to be no good, but if you mean this one, then based on some measured specs it's HF mass corner is much too high for me, though some of the Lowther folks don't seem to mind such high acoustic XOs.

GM

Scottmoose · 5th May 2009, 11:44 PM

Heck, I make that up around 619Hz per Keele. Too high for my taste.

brsanko · 6th May 2009, 12:51 AM

Well I guess I don't know what that means.

brsanko · 6th May 2009, 12:58 AM

Oh yeah I forgot to post my hornresp data.

rjbond3rd · 6th May 2009, 03:00 AM

Quote:

Originally posted by brsanko
Well I guess I don't know what that means.

Check out GM's post here: http://www.diyaudio.com/forums/showt...79#post1643579

brsanko · 6th May 2009, 05:26 AM

Quote:

Originally posted by GM
Your link appears to be no good, but if you mean this one, then based on some measured specs it's HF mass corner is much too high for me, though some of the Lowther folks don't seem to mind such high acoustic XOs.

GM

Yes that's the one.

Scottmoose · 6th May 2009, 08:15 AM

Hmm. Even using Qe rather than Qt, it's still up around 394Hz. High.

GM · 6th May 2009, 05:52 PM

FWIW, it's ~403 Hz with the measured specs I have. BTW, Qts is the most correct value to use for calculating the mass corners and what sealed, ported box design is based on, but for horns we're mostly interested in a driver's effective motor strength, which is Qes.

Since the majority of the math side of my design knowledge was 'distilled' by the pioneers of audio, Altec and later, Prof. Leach, I wasn't aware of Keele's formulas until they cropped up on the Sound Practices list (AKA joelist), so never having compared the two, not sure if there's any audible difference with typical point source drivers meant for simple box loading, though for horn drivers (low Qms) such as the Galaxy, there's enough of a difference that AFAIK a person would have to be tone deaf to phasing issues not to hear it.

GM

brsanko · 8th May 2009, 03:16 AM

could you tell me in simple terms what effect that would have on the sound. I plan on reading up on this but I haven't been feeling good and have a pounding headache at the moment so I'm not really in the mood to do a bunch of reading. Don't mean to be a PITA but I would appreciate it alot.

5th May 2009, 11:16 PM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Your link appears to be no good, but if you mean this one, then based on some measured specs it's HF mass corner is much too high for me, though some of the Lowther folks don't seem to mind such high acoustic XOs. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

6th May 2009, 12:51 AM	#4
brsanko diyAudio Member Join Date: Dec 2003 Location: Cloquet, MN	Well I guess I don't know what that means. __________________ PASSIONN

6th May 2009, 05:52 PM	#9
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	FWIW, it's ~403 Hz with the measured specs I have. BTW, Qts is the most correct value to use for calculating the mass corners and what sealed, ported box design is based on, but for horns we're mostly interested in a driver's effective motor strength, which is Qes. Since the majority of the math side of my design knowledge was 'distilled' by the pioneers of audio, Altec and later, Prof. Leach, I wasn't aware of Keele's formulas until they cropped up on the Sound Practices list (AKA joelist), so never having compared the two, not sure if there's any audible difference with typical point source drivers meant for simple box loading, though for horn drivers (low Qms) such as the Galaxy, there's enough of a difference that AFAIK a person would have to be tone deaf to phasing issues not to hear it. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

8th May 2009, 03:16 AM	#10
brsanko diyAudio Member Join Date: Dec 2003 Location: Cloquet, MN	could you tell me in simple terms what effect that would have on the sound. I plan on reading up on this but I haven't been feeling good and have a pounding headache at the moment so I'm not really in the mood to do a bunch of reading. Don't mean to be a PITA but I would appreciate it alot. __________________ PASSIONN

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5th May 2009, 11:44 PM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Heck, I make that up around 619Hz per Keele. Too high for my taste.

6th May 2009, 08:15 AM	#8
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Hmm. Even using Qe rather than Qt, it's still up around 394Hz. High.

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