And Now For Something REALLY BIG - Page 84

tinitus · 6th February 2013, 09:59 AM

Quote:

Originally Posted by JRKO

cheaper than the 510 ...ported 75l cabinet tuned to 45hz ....

the neo 500 ought to give you a small bit more bass output than the ferrite 510, due to the slightly higher Qts, all else being the same, but maybe only theoretical

Quote:

Originally Posted by JRKO

There's always this type of tractrix to try. It looks a tad simpler....

looks more like a modified Iwata to me
add rounded solid wood at front edge of top and bottom, and you have it

the construction still does have a few weird angles that tend to be difficult
but it looks cool

JRKO · 10:20 AM

Thats what WinISD shows too. More depth, slightly less snap I'd guess.

510 has a -3db of 63hz when tuned to 52Hz

I will have some control with the miniDSP as well thou

15PR400 behaves similar to the 500 but the QMS is 6 as opposed to 10 (qes & qts are comparable)

Several of those non circular tractrix type horns show up in a google search for tractrix. Only the two vertical sides follow the tractrix curve

tinitus · 6th February 2013, 11:48 AM

I have thought about 'lining' inside of top and bottom with acoustic foam

JRKO · 6th February 2013, 12:00 PM

I have to think how to paint the multicells so Mrs JRKO is more approving

Gonna be kind of white inside and natural cork outside

this is the only practical idea I can find - How to paint Multicell horns?

tinitus · 6th February 2013, 12:20 PM

hmm, some surfaces will always look slightly scruffy, no matter what you do

maybe best the answer is the kind of 'structural paint' used for PA speakers
but probably best use it only on outher surface, and maybe mouth area

but if she is to the 'antique' look, there might some other options like maybe a stained copper look
leaf gold ? maybe you can get 'leaf copper' too

JRKO · 6th February 2013, 12:26 PM

Quote:

Originally Posted by tinitus

hmm, some surfaces will always look slightly scruffy, no matter what you do

As the 'cells are mdf they should take ok. I kind of like the fill a cell with paint then open the bottom idea. I wonder about spraying them with a primer first?

So long as they look better than plain ole mdf its ok

natural cork is supposed to help with resonance of these non metal 'cell sets

tinitus · 6th February 2013, 12:30 PM

mdf is usually one of the better surfaces for paints

JRKO · 6th February 2013, 12:39 PM

wife saw this and said 'No'

JRKO · 6th February 2013, 12:40 PM

wife saw this and said 'Okay'

tinitus · 6th February 2013, 01:18 PM

ofcourse

try with a touch of very light yellow

6th February 2013, 10:10 AM	#832
JRKO diyAudio Member Join Date: Dec 2003 Location: U.K.	Thats what WinISD shows too. More depth, slightly less snap I'd guess. 510 has a -3db of 63hz when tuned to 52Hz I will have some control with the miniDSP as well thou 15PR400 behaves similar to the 500 but the QMS is 6 as opposed to 10 (qes & qts are comparable) Several of those non circular tractrix type horns show up in a google search for tractrix. Only the two vertical sides follow the tractrix curve __________________ In the interests of full disclosure JRKO = James Rupert Kingsley Osborne. And yes, my parents will pay for it when I choose their retirement home Last edited by JRKO; 6th February 2013 at 10:20 AM.

6th February 2013, 12:00 PM	#834
JRKO diyAudio Member Join Date: Dec 2003 Location: U.K.	I have to think how to paint the multicells so Mrs JRKO is more approving Gonna be kind of white inside and natural cork outside this is the only practical idea I can find - How to paint Multicell horns? __________________ In the interests of full disclosure JRKO = James Rupert Kingsley Osborne. And yes, my parents will pay for it when I choose their retirement home

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6th February 2013, 11:48 AM	#833
tinitus diyAudio Moderator Join Date: Nov 2005	I have thought about 'lining' inside of top and bottom with acoustic foam

6th February 2013, 12:20 PM	#835
tinitus diyAudio Moderator Join Date: Nov 2005	hmm, some surfaces will always look slightly scruffy, no matter what you do maybe best the answer is the kind of 'structural paint' used for PA speakers but probably best use it only on outher surface, and maybe mouth area but if she is to the 'antique' look, there might some other options like maybe a stained copper look leaf gold ? maybe you can get 'leaf copper' too

6th February 2013, 12:30 PM	#837
tinitus diyAudio Moderator Join Date: Nov 2005	mdf is usually one of the better surfaces for paints

6th February 2013, 01:18 PM	#840
tinitus diyAudio Moderator Join Date: Nov 2005	ofcourse try with a touch of very light yellow