First Build: Pensil P11 - Page 2

GM · 21st December 2020, 03:47 AM

Agreed, I just couldn't remember what I'd posted on several occasions was the MDF thickness required to match up to the 19 mm no void plywood's 1.8 mil psi MOE spec; finally remembered it is 1.25"/31.75 mm, so two 15 mm bonded together with a hard setting adhesive is close enough to not need any bracing for a small 'FR' driver.

GM

BKE · 22nd December 2020, 05:20 PM

Regarding the bracing; if I recall correctly it is supposed to be tight to the back the driver, since the bracing is offset it will be bracing one side more than the other. That seems a bit odd to me, am I interpreting this incorrectly?

planet10 · 22nd December 2020, 05:39 PM

The brace is close enuff to the middle of the magnet that it makes no difference, but the back panel is now subdived into 2 subpanels with unequal aspet ratios so they do not have the same resoannce potential.

dave

BKE · 22nd December 2020, 05:41 PM

Understood, thank you Dave.

BKE · 9th January 2021, 04:57 PM

Well the SuperPensil build is underway; much learned on my first build, operative word being first.
I attempted, well I might add, to miter everything vs veneer. Don’t do it unless you’re skilled, a lot of waste and frustration.
With that said, I dry fit them last evening and only had a few areas of correction. Once I finish the bracing and final assembly I’ll post some pictures. I don’t know how I will finish them, form to follow.

planet10 · 9th January 2021, 05:03 PM

:^)

It is hard to stop after just 1 cookie.

dave

BKE · 9th January 2021, 05:04 PM

I’m a very weak man when it comes to cookies

mhenschel · 12:42 AM

BKE · 12th January 2021, 02:09 PM

Good ole chocolate chip, nuts are acceptable in moderation. Biscuits, not so much, except with coffee in the afternoon.

mhenschel · 12th January 2021, 02:40 PM

@p10 -- thanks
@BKE -- so... cookie cutter, not biscuit cutter (joiner), then. ;-)

21st December 2020, 03:47 AM	#11
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Agreed, I just couldn't remember what I'd posted on several occasions was the MDF thickness required to match up to the 19 mm no void plywood's 1.8 mil psi MOE spec; finally remembered it is 1.25"/31.75 mm, so two 15 mm bonded together with a hard setting adhesive is close enough to not need any bracing for a small 'FR' driver. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

22nd December 2020, 05:39 PM	#13
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III	The brace is close enuff to the middle of the magnet that it makes no difference, but the back panel is now subdived into 2 subpanels with unequal aspet ratios so they do not have the same resoannce potential. dave __________________ Stay safe. Stay home. Respect the 2m bubble.

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22nd December 2020, 05:20 PM	#12
BKE diyAudio Member Join Date: Nov 2020 Location: Rochester, NY	Regarding the bracing; if I recall correctly it is supposed to be tight to the back the driver, since the bracing is offset it will be bracing one side more than the other. That seems a bit odd to me, am I interpreting this incorrectly?

22nd December 2020, 05:41 PM	#14
BKE diyAudio Member Join Date: Nov 2020 Location: Rochester, NY	Understood, thank you Dave.

9th January 2021, 04:57 PM	#15
BKE diyAudio Member Join Date: Nov 2020 Location: Rochester, NY	Well the SuperPensil build is underway; much learned on my first build, operative word being first. I attempted, well I might add, to miter everything vs veneer. Don’t do it unless you’re skilled, a lot of waste and frustration. With that said, I dry fit them last evening and only had a few areas of correction. Once I finish the bracing and final assembly I’ll post some pictures. I don’t know how I will finish them, form to follow.

9th January 2021, 05:03 PM	#16
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III	:^) It is hard to stop after just 1 cookie. dave

9th January 2021, 05:04 PM	#17
BKE diyAudio Member Join Date: Nov 2020 Location: Rochester, NY	I’m a very weak man when it comes to cookies

12th January 2021, 02:09 PM	#19
BKE diyAudio Member Join Date: Nov 2020 Location: Rochester, NY	Good ole chocolate chip, nuts are acceptable in moderation. Biscuits, not so much, except with coffee in the afternoon.

12th January 2021, 02:40 PM	#20
mhenschel diyAudio Member Join Date: May 2019	@p10 -- thanks @BKE -- so... cookie cutter, not biscuit cutter (joiner), then. ;-)