cut out size for for Dayton ND20FA 3/4" tweeter?

Greybeard1 · 14th August 2008, 12:07 AM

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

gychang · 14th August 2008, 01:23 AM

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

Greybeard1 · 14th August 2008, 04:44 AM

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

gychang · 14th August 2008, 12:46 PM

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

loninappleton · 14th August 2008, 08:31 PM

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.

gychang · 15th August 2008, 01:50 AM

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

Fast1one · 15th August 2008, 04:08 PM

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...

Greybeard1 · 16th August 2008, 01:03 AM

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

14th August 2008, 12:07 AM	#1
Greybeard1 diyAudio Member Join Date: Jun 2005 Location: Vancouver BC	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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14th August 2008, 01:23 AM	#2
gychang diyAudio Member Join Date: Feb 2005 Location: Phoenix, Arizona	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

14th August 2008, 04:44 AM	#3
Greybeard1 diyAudio Member Join Date: Jun 2005 Location: Vancouver BC	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

15th August 2008, 04:08 PM	#7
Fast1one diyAudio Member 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...

16th August 2008, 01:03 AM	#8
Greybeard1 diyAudio Member Join Date: Jun 2005 Location: Vancouver BC	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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