cut out size for for Dayton ND20FA 3/4" tweeter? - diyAudio
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Old 14th August 2008, 12:07 AM   #1
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Join Date: Jun 2005
Location: Vancouver BC
Default cut out size for for Dayton ND20FA 3/4" tweeter?

I'm working through a build of Pioneer B20 fullrangers with Dayton ND20FA 3/4" neodymium tweeters to augment the high end.

The spec sheet states the cut out (tweeter width) is 33mm. I don't have calipers, and I'll need to buy a driller bit to put these in.

Looking for a "been there, done that" opinion as to what size drill works for a press-in fit.

If I had to guess, I say 1 & 5/16", but it might be a little off.

thanks..

GB
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Old 14th August 2008, 01:23 AM   #2
gychang is offline gychang  United States
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I have the same tweeter in garage soon to be used... I would be very interested in your mating it with B20.

I googled the 33mm and is equal to 1.299".

gychang
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Old 14th August 2008, 04:44 AM   #3
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Join Date: Jun 2005
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I already did that... I'm looking for some drill size that actually works.

1 - 5/16 is a little over... 1.31
1 - 9/32 is a little under at 1.28
1 - 19/64 would be about right at 1.297, but I've never seen such a thing, although I'm sure it must exist.

I can't seem to actually find a 33mm drill at Lee Valley.

I'm hoping someone has used something and can comment on what size works.

GB
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Old 14th August 2008, 12:46 PM   #4
gychang is offline gychang  United States
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Join Date: Feb 2005
Location: Davis, California
Quote:
Originally posted by Greybeard1
I already did that... I'm looking for some drill size that actually works.

1 - 5/16 is a little over... 1.31
1 - 9/32 is a little under at 1.28
1 - 19/64 would be about right at 1.297, but I've never seen such a thing, although I'm sure it must exist.

I can't seem to actually find a 33mm drill at Lee Valley.

I'm hoping someone has used something and can comment on what size works.

GB

want to try 9/32 and manually enlarge with finger-sandpaper?

gychang
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Old 14th August 2008, 08:31 PM   #5
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Location: Appleton, WI
Quote:
Originally posted by gychang



want to try 9/32 and manually enlarge with finger-sandpaper?

gychang
I looked at the pdf. There is a flange that covers up the cutout.

If you use some non adhesive plumbers tape that might give a
press in fit.

Also a question for gychang and others: Would one of these button tweeters work with this Tangband:


http://www.partsexpress.com/pe/showd...number=264-850


I have had my eye on this as a way to get into the 5 inch range.
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Old 15th August 2008, 01:50 AM   #6
gychang is offline gychang  United States
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Join Date: Feb 2005
Location: Davis, California
Quote:
Originally posted by loninappleton


Would one of these button tweeters work with this Tangband:


http://www.partsexpress.com/pe/showd...number=264-850


I will be experimenting with a tweeter and 4 1/2" Pioneer (A11) but no experience with the TB.

gychang
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Old 15th August 2008, 04:08 PM   #7
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Join Date: Sep 2006
If you look on the parts express page:

http://www.partsexpress.com/pe/showd...number=275-030

You will notice that the dimension B is 1-5/16"

I didn't have this bit, IIRC I used 1-1/4 for mine then filed it a little until it squeezed in...

Hope this helps...
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Old 16th August 2008, 01:03 AM   #8
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aahhh... I never saw that, I just went by the spec sheet.

I'll try the 1 - 5/16 size and report back.

thanks

GB
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