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Old 1st April 2011, 11:09 AM   #1
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Default Which Bohlender Graebener Neo3?

I'm doing an open baffle and after reading posts here (was it twest820 or cuibono?) switched the choice of tweeter to BG’s Neo3.
When I quickly piggy backed (to combine & save shipping) as a friend some ordered some stuff from PE, not realising there was a PDR model, I goofed with the model. I thought when I bought Bohlender Graebener Neo3-PDRW Planar Tweeter w/Back Cup, the sensitivity of 90.5 dB indicated to me it was the open backed version.

Now it’s arrived, I see I was wrong.

Without me possibly messing up a driver, can the rear chamber be removed?

Or, can someone confirm my new order . .
Personally, I’d sacrifice a little directivity up high for a little more sensitivity.
If i now have it right, the “normal” non PDR Neo3 is more sensitive, and produces consistent directivity up to about 8.5 kHz, which is good enough for me (my hearing starts to drop off at about 6 kHz).

And to get from from Parts Express (who have lower shipping costs to here – Australia) the open back ones - which isn’t a separate item number, I assume you specify that somewhere in the order . .

Thanks

Last edited by otto88; 1st April 2011 at 11:12 AM.
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Old 1st April 2011, 12:31 PM   #2
adason is offline adason  United States
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"Without me possibly messing up a driver, can the rear chamber be removed?"

yes
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Old 1st April 2011, 12:40 PM   #3
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procedure?
__________________
AM
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Old 1st April 2011, 12:51 PM   #4
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Quote:
Originally Posted by ashok View Post
procedure?
Here we go

Click the image to open in full size.
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Old 1st April 2011, 02:31 PM   #5
boone is offline boone  United States
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otto88,

It is very easy to remove the back cup from Neo3-PDR. I used a large Jorgensen clamp to flex the sides of the back cup where they attach to the metal body of the tweeter. Once you pop the glue bond in a couple of places, just grab the back cup and twist it off. Danny Ritchie of GR Research said he just knocks it off with a hammer as demonstrated by ShinOBIWAN in the above post but I didn't have the nerve to try that. Good luck.

boone
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Old 1st April 2011, 02:33 PM   #6
adason is offline adason  United States
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I use sharp knife, gently push it under the cover in few spots and lift it...you'll see its easy
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Old 1st April 2011, 03:52 PM   #7
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thanks guys
I'll try when daylight returns
Cheers
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