Dual drivers in 1 horn.

lbg · 30th December 2007, 07:00 PM

Hi

I am thinking about 2 Monacor SP-80X side by side in 1 box.

If possible one off the Spawn Family horns http://www.frugal-horn.com/spawn-plans.html

Cons ? dont work :-)

Pro ? more DB

Scottmoose · 30th December 2007, 07:23 PM

Can't say, without any information about the driver[s].

lbg · 31st December 2007, 04:03 PM

I am a newbie

so just tell me if it an bad idea

http://www.monacor.dk/produkter/hoej...257&no_cache=1

Svein_B · 31st December 2007, 04:17 PM

The short answer: It is generally not a good idea to run two fullrange speakers in parallel. It crates uneven frequency responses.

The model you propose is probably not the best choice among the Monacor drivers, unless you already have them.
The reasons are lack of published T/S parameters (such as Vas and Qts), and a little troublesome frequency response.

SveinB.

Peter M. · 31st December 2007, 04:21 PM

http://www.thehornshoppe.com/model2.html

Svein_B · 31st December 2007, 04:37 PM

Quote:

Originally posted by Peter M.
http://www.thehornshoppe.com/model2.html

It does not help even if the guy who made them is called Ed, and has a collection of firearms

It is still not a very good idea.

See attached graph. As you move off-axis you loose parts of the frequency range due to comb-filter effects.

SveinB

Scottmoose · 31st December 2007, 05:25 PM

Right. Ed's a bright bloke, and I enjoy our occasional (lively) debates, but you can't beat the laws of physics. Lobing is going to occur. On occasion, you might get away with it. But I prefer not to risk it in the first place.

As noted, sadly, the data sheet for those Monacors is valueless, because it basically doesn't give any.

chrisb · 31st December 2007, 09:54 PM

Svein / Scott - you should know better than to invoke "inviolate laws of nature", and mathematical modeling programs of any flavor in the same post as E'd name

BTW - ask him if he has a playlist of favorite demo tracks he'd be willing to share with you.

Now, if one was to bipole load a single BLH with small FR driver, how would that model ? If so, then I've got CAD sketches for such a design concept that are carbon dated at least 5yr ago.

planet10 · 31st December 2007, 10:20 PM

Quote:

Originally posted by Peter M.
thehornshoppe model2

The only stand out there are the optional grills....

dave

ronc · 31st December 2007, 11:23 PM

you can't beat the laws of physics\

Unless you change the laws.

ron

30th December 2007, 07:00 PM	#1
lbg diyAudio Member Join Date: Dec 2006	Dual drivers in 1 horn. Hi I am thinking about 2 Monacor SP-80X side by side in 1 box. If possible one off the Spawn Family horns http://www.frugal-horn.com/spawn-plans.html Cons ? dont work :-) Pro ? more DB

31st December 2007, 04:21 PM	#5
Peter M. diyAudio Member Join Date: Jan 2005 Location: Østfold	http://www.thehornshoppe.com/model2.html __________________ Note to myself: Never again use fingers to check if there still is voltage left in a capacitor...

31st December 2007, 09:54 PM	#8
chrisb diyAudio Member Join Date: Aug 2002 Location: victoria BC	Svein / Scott - you should know better than to invoke "inviolate laws of nature", and mathematical modeling programs of any flavor in the same post as E'd name BTW - ask him if he has a playlist of favorite demo tracks he'd be willing to share with you. Now, if one was to bipole load a single BLH with small FR driver, how would that model ? If so, then I've got CAD sketches for such a design concept that are carbon dated at least 5yr ago. __________________ you don't really believe everything you think, do you? community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi

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30th December 2007, 07:23 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Can't say, without any information about the driver[s].

31st December 2007, 04:03 PM	#3
lbg diyAudio Member Join Date: Dec 2006	I am a newbie so just tell me if it an bad idea http://www.monacor.dk/produkter/hoej...257&no_cache=1

31st December 2007, 04:17 PM	#4
Svein_B diyAudio Member Join Date: Oct 2005	The short answer: It is generally not a good idea to run two fullrange speakers in parallel. It crates uneven frequency responses. The model you propose is probably not the best choice among the Monacor drivers, unless you already have them. The reasons are lack of published T/S parameters (such as Vas and Qts), and a little troublesome frequency response. SveinB.

31st December 2007, 05:25 PM	#7
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Right. Ed's a bright bloke, and I enjoy our occasional (lively) debates, but you can't beat the laws of physics. Lobing is going to occur. On occasion, you might get away with it. But I prefer not to risk it in the first place. As noted, sadly, the data sheet for those Monacors is valueless, because it basically doesn't give any.

31st December 2007, 11:23 PM	#10
ronc diyAudio Member Join Date: Mar 2003	you can't beat the laws of physics\ Unless you change the laws. ron

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