Dome Protection

eStatic · 10th February 2004, 02:44 PM

I'm working on a design the uses the Morel MDT-39 tweeter. Its dome extends about 1/8" above the housing. I'd like to use a sock to cover the speaker. I'm thinking about using an arch of screen wire to protect the dome. But I am concerned about diffraction problems caused by the screen. Anyone done this? Anyone have thoughts on other solutions?

phase_accurate · 10th February 2004, 02:58 PM

Quote:

Anyone done this? Anyone have thoughts on other solutions?

one possible solution:

http://www.dynaudiousa.com/mainmenu/...temptation.pdf

another one (Accuton Tweeter):

http://www.cvd-diamond.com/tfdipo/frames_d.htm

Regards

Charles

qwad · 10th February 2004, 06:23 PM

IMO you are worrying about nought and only complicating things unnecesseraly soft domes like the morels are quite forgiving of prying fingers etc, and dont really need any protection only if it was alloy

cheers TC

sreten · 10th February 2004, 07:20 PM

simply recess the tweeter by an extra 1/8" or so and add a bevel to the recess cutout.

sreten.

eStatic · 10th February 2004, 08:00 PM

Ah. sreten, I like that answer. I'll try that first. Have you any empirically based bevel types/angles to recomend?

5th element · 11th February 2004, 09:53 AM

Ok ill second the reply of qwad, I have MDT30's and unfortunatly then dome got completely squashed in I mean completely looked like a focal tweet.

Either way I used the not very stylish but works technique of sucking out the dome a la bouche. Either way no dmg done to the dome, no effect on the sound = no worries. Remember these domes are made of soft fabric out clothes dont die when we move in them so why should a soft dome. The shape of these is maintained I think anyway by the profile of the thing, Ie the circular nature.

eStatic · 11th February 2004, 12:38 PM

OK 5th, I believe y'all, and appreciate the suggestions, but I want to put a sock on it. Cloth stretched over the domes can't be a good thing can it?

sreten · 11th February 2004, 06:06 PM

Quote:

Originally posted by eStatic
Ah. sreten, I like that answer. I'll try that first. Have you any empirically based bevel types/angles to recomend?

For 3/16" IMO bevel profiles are not an issue.

I'd suggest a plane 60 angle with a little rounding / sanding of
the outside edge.

sreten.

P.S. also make sure the bass units at full mechanical Xmax do not
touch the sock, a mistake I made with a driver with a forward roll
surround, the occasional buzzing with grilles on had me perplexed.

eStatic · 11th February 2004, 09:40 PM

Many thanks, especially for that last bit. It would never have occurred to me.

10th February 2004, 02:44 PM	#1
eStatic diyAudio Member Join Date: Dec 2003 Location: blue ridge mountains	Dome Protection I'm working on a design the uses the Morel MDT-39 tweeter. Its dome extends about 1/8" above the housing. I'd like to use a sock to cover the speaker. I'm thinking about using an arch of screen wire to protect the dome. But I am concerned about diffraction problems caused by the screen. Anyone done this? Anyone have thoughts on other solutions? __________________ This space for rent.

10th February 2004, 06:23 PM	#3
qwad diyAudio Member Join Date: Mar 2003 Location: adelaide city of churches	IMO you are worrying about nought and only complicating things unnecesseraly soft domes like the morels are quite forgiving of prying fingers etc, and dont really need any protection only if it was alloy cheers TC __________________ we all have problems only some people have more than most.... long live the Magyar (Hungarians) in the world!

10th February 2004, 08:00 PM	#5
eStatic diyAudio Member Join Date: Dec 2003 Location: blue ridge mountains	Ah. sreten, I like that answer. I'll try that first. Have you any empirically based bevel types/angles to recomend? __________________ This space for rent.

11th February 2004, 09:53 AM	#6
5th element diyAudio Member Join Date: Oct 2002 Location: England	Ok ill second the reply of qwad, I have MDT30's and unfortunatly then dome got completely squashed in I mean completely looked like a focal tweet. Either way I used the not very stylish but works technique of sucking out the dome a la bouche. Either way no dmg done to the dome, no effect on the sound = no worries. Remember these domes are made of soft fabric out clothes dont die when we move in them so why should a soft dome. The shape of these is maintained I think anyway by the profile of the thing, Ie the circular nature. __________________ What the hell are you screamin' for? Every five minutes there's a bomb or somethin'! I'm leavin! bzzzz! Droggon Attack!

11th February 2004, 12:38 PM	#7
eStatic diyAudio Member Join Date: Dec 2003 Location: blue ridge mountains	OK 5th, I believe y'all, and appreciate the suggestions, but I want to put a sock on it. Cloth stretched over the domes can't be a good thing can it? __________________ This space for rent.


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10th February 2004, 07:20 PM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	simply recess the tweeter by an extra 1/8" or so and add a bevel to the recess cutout. sreten.

11th February 2004, 09:40 PM	#9
eStatic diyAudio Member Join Date: Dec 2003 Location: blue ridge mountains	Many thanks, especially for that last bit. It would never have occurred to me. __________________ This space for rent.

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