Looking for phase plug ideas for horn loaded 10" and 12" drivers

Eva · 7th January 2008, 09:55 PM

I'm dealing with 10" and 12" horn loaded drivers and I'm looking for phase plug layout ideas (or drawings) allowing to get as wide as possible horizontal coverage and smooth frequency response up to as high as possible. Pictures of existing systems are also appreciated. I just need food for thought

MaVo · 7th January 2008, 10:05 PM

perhaps this helps...

http://www.users.bigpond.net.au/ggoo...diy/plugs.html

here is the front page...

http://www.users.bigpond.net.au/ggoodacre/centauri/diy/

pinkmouse · 7th January 2008, 10:29 PM

Have you seen the Turbosound ones? If not, I'll take some pics tomorrow as I have a Floodlight box on the bench, (well, not literally, but you know what I mean) at the moment.

Eva · 7th January 2008, 10:42 PM

Thanks MaVo, this website gave me some ideas and motivation for lathe work

Hi Pinkmouse. From Turbosound I only had the chance to study the old TMS-4 compact boxes, and the mid horn and driver combination in this box was not particularly good. I suppose they have much better stuff, so please show me some pictures

pinkmouse · 8th January 2008, 07:00 PM

Here you go. The high and low mids of a floodlight box. Bottom is a 12", the top missing one is a 6.5", removed as the box had been dropped and the VC was seized.

pinkmouse · 8th January 2008, 07:01 PM

And a close up of the lower mid phase plug:

pinkmouse · 8th January 2008, 07:03 PM

The upper mid phase plug removed. You can clearly see here how the plug bolts through the centre of the VC:

pinkmouse · 8th January 2008, 07:03 PM

And a front view. You might have difficulty making this on a lathe.

myhrrhleine · 8th January 2008, 07:23 PM

The website is among the best I've seen on phase plugs.
Just to add for those who don't have a wood shop, automotive body putty works well.

technofreak · 8th January 2008, 07:52 PM

What frequenzy range are you after? With 10" and 12" you're getting to about 2 kHz best before it gets too tricky... Funktion One gets 6,5 kHz from a horn-loaded 8", but they use custom drivers and their R&D is way better than any of us, DIY-s, can dream about...

I think you could get the "phone band" (300...4000Hz) from a 6,5" driver... with some work. Eminence Alpha 6 (direct radiating it's good up to 5 kHz) is a good candidate. There is a a thread on speakerplans forums about this driver in horn getting to some 3 kHz with a simple egg-shaped plug, so it should be able to get to 3,5...4 kHz, but any higher would get really complicated fast, I quess.

7th January 2008, 09:55 PM	#1
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Looking for phase plug ideas for horn loaded 10" and 12" drivers I'm dealing with 10" and 12" horn loaded drivers and I'm looking for phase plug layout ideas (or drawings) allowing to get as wide as possible horizontal coverage and smooth frequency response up to as high as possible. Pictures of existing systems are also appreciated. I just need food for thought __________________ I use to feel like the small child in The Emperor's New Clothes tale

7th January 2008, 10:29 PM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Have you seen the Turbosound ones? If not, I'll take some pics tomorrow as I have a Floodlight box on the bench, (well, not literally, but you know what I mean) at the moment. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

7th January 2008, 10:42 PM	#4
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Thanks MaVo, this website gave me some ideas and motivation for lathe work Hi Pinkmouse. From Turbosound I only had the chance to study the old TMS-4 compact boxes, and the mid horn and driver combination in this box was not particularly good. I suppose they have much better stuff, so please show me some pictures __________________ I use to feel like the small child in The Emperor's New Clothes tale

8th January 2008, 07:23 PM	#9
myhrrhleine diyAudio Member Join Date: Jan 2006 Location: Avalon Island	The website is among the best I've seen on phase plugs. Just to add for those who don't have a wood shop, automotive body putty works well. __________________ Just because you can't hear it doesn't mean no one can.

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7th January 2008, 10:05 PM	#2
MaVo diyAudio Member Join Date: Jan 2006 Location: Herne	perhaps this helps... http://www.users.bigpond.net.au/ggoo...diy/plugs.html here is the front page... http://www.users.bigpond.net.au/ggoodacre/centauri/diy/

8th January 2008, 07:52 PM	#10
technofreak diyAudio Member Join Date: Dec 2006	What frequenzy range are you after? With 10" and 12" you're getting to about 2 kHz best before it gets too tricky... Funktion One gets 6,5 kHz from a horn-loaded 8", but they use custom drivers and their R&D is way better than any of us, DIY-s, can dream about... I think you could get the "phone band" (300...4000Hz) from a 6,5" driver... with some work. Eminence Alpha 6 (direct radiating it's good up to 5 kHz) is a good candidate. There is a a thread on speakerplans forums about this driver in horn getting to some 3 kHz with a simple egg-shaped plug, so it should be able to get to 3,5...4 kHz, but any higher would get really complicated fast, I quess.

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