Submaximus V3 UXL18 Build - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 2Likes
  • 1 Post By hd0823
  • 1 Post By asarose247
 
Thread Tools
post #1 of 10 Old 08-13-2019, 05:59 PM - Thread Starter
Newbie
 
roweaz's Avatar
 
Join Date: Mar 2012
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Submaximus V3 UXL18 Build

Having built two F20s, and a lilwrecker previously, wanted to give this big boy a go. I have the wood, I have the UXL-18, but I also have questions.

When laying out the measurements on one side panel I noticed that because of the length of B, assuming that C is perpendicular to F, even small adjustments to measurements 4 and 5 cause the spacing between panels A and B where they meet H to vary considerably.

I wondered if anyone knew what that measurement should be. Or, another way to answer that question would be to know how far the driver center should be from the end of Panel B so that you could set that point 3.23 inches from A.


I didn't see this info elsewhere, and from pictures I've googled, it seems there has been some variation in the driver center placement. Is it really that non important?

Of course I would have posted the original layout image in this post for convenience however I will have to respond to myself 4 times first.
Attached Thumbnails
Click image for larger version

Name:	Submaximus V3 April 2015 measurement diagram.png
Views:	32
Size:	39.1 KB
ID:	2602640  
roweaz is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 08-13-2019, 06:08 PM
Senior Member
 
BryceDH's Avatar
 
Join Date: Nov 2016
Location: Lexington, SC
Posts: 284
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 176 Post(s)
Liked: 158
Sub'd... submaximus's are awesome!

Sent from my SM-N960U using Tapatalk

Equipment: Yamaha 3050, Oppo 103d, DIYSG HT12s (L,C,R), PSA mt 110s (SR,SL), 2 VBSS, Submaximus, 4 driver BOSS build, umik-1, Epson 3700
BryceDH is offline  
post #3 of 10 Old 08-13-2019, 07:27 PM
AVS Forum Special Member
 
Join Date: Aug 2018
Location: Sonoma County, CA
Posts: 2,785
Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 1625 Post(s)
Liked: 1236
Quote:
Originally Posted by BryceDH View Post
Sub'd... submaximus's are awesome!

Sent from my SM-N960U using Tapatalk

Make it two!

Leave it at 8 ohms and call it a day :)
Russdawg1 is online now  
Sponsored Links
Advertisement
 
post #4 of 10 Old 08-13-2019, 08:15 PM
AVS Forum Special Member
 
hd0823's Avatar
 
Join Date: Oct 2015
Posts: 2,112
Mentioned: 129 Post(s)
Tagged: 0 Thread(s)
Quoted: 786 Post(s)
Liked: 1525
Measurement 1 Is the most important one to get dead on . I had small variations on some of the other measurements. I just found where 3.23 was from panal a marked a dot on b and than marked a dot at 12 inchs down for the center.

Sent from my SM-N950U using Tapatalk
LTD02 likes this.
hd0823 is online now  
post #5 of 10 Old 08-13-2019, 08:42 PM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,375
Mentioned: 104 Post(s)
Tagged: 2 Thread(s)
Quoted: 1229 Post(s)
Liked: 1076
^

exactly

dry fit, measure
Attached Thumbnails
Click image for larger version

Name:	20160714_124243.jpg
Views:	26
Size:	647.6 KB
ID:	2602720   Click image for larger version

Name:	20160714_133931.jpg
Views:	28
Size:	780.7 KB
ID:	2602722  
LTD02 likes this.

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is online now  
post #6 of 10 Old 08-13-2019, 10:15 PM - Thread Starter
Newbie
 
roweaz's Avatar
 
Join Date: Mar 2012
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Thanks for the quick responses guys. I must just be being dense.

In my photo, if you adjust the measurement at location A by just 3/32 of an inch, it adjusts the measurement at location B by 1/4 inch. This in turn adjusts the measurement to where the throat is 3.23" from ~6.8 to 10 3/8" at location C. So, 6.8" won't work for an 18" driver, much less a 21" that some are using. The 10 3/8 will work for the 18" fine, but would be questionable for a 21". I guess I just thought if the correct measurement was known for the distance between Panel A and Panel B at Panel H, then you could set Panel B, measure up to 3.23" and know that was the correct center for the driver. Otherwise, if the correct measurement was known for the center of the driver to edge of Panel B, then you could set that point 3.23" from Panel A and know it was correct. What I am doing just feels like guessing. I would think that the flare rate and distance behind the driver would be important.

From your photo asarose247, it appears the measurement I am asking about is 2 3/8" resulting in a driver center of 15 7/8" from the end of the panel. However, photos from another build appear to be closer to 11 inches.

I just want to make sure before I continue.

Thanks for the help.
Attached Thumbnails
Click image for larger version

Name:	Submax1.jpg
Views:	21
Size:	741.3 KB
ID:	2602732  

Last edited by roweaz; 08-13-2019 at 10:58 PM.
roweaz is offline  
post #7 of 10 Old 08-13-2019, 10:54 PM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,375
Mentioned: 104 Post(s)
Tagged: 2 Thread(s)
Quoted: 1229 Post(s)
Liked: 1076
https://www.avsforum.com/forum/155-d...mus+2016+Redux

HTH

i probably did the "easy" panels, F, E, I
which then lead to A, H,D and then a dry fit G
to see how it all lined up for B to hit it's end mark at pts 2, 3, 4
and the length it was to arrive at H

you'll see in my thread, if you already haven't, that some measurements / lengths were changed to accommodate my 'sanderply " thickness of .709

and a big fat
TY
@ LTD02

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is online now  
post #8 of 10 Old 08-13-2019, 11:10 PM
AVS Forum Special Member
 
asarose247's Avatar
 
Join Date: Mar 2010
Location: DIY enabled in SoCal / OC
Posts: 4,375
Mentioned: 104 Post(s)
Tagged: 2 Thread(s)
Quoted: 1229 Post(s)
Liked: 1076
not all pics I took are in the thread

stabilizing "F"

my defense against "kreg creep"- hit the mark

dry fit of "H"

notice that A is not yet on
and that gap at A-C- kregs, PL3, and long ass 3/4" pipe clamps and blocking and . . .

those black right angles are a rockler product and handy as all get-out
Attached Thumbnails
Click image for larger version

Name:	20160707_142145.jpg
Views:	22
Size:	682.4 KB
ID:	2602752   Click image for larger version

Name:	20160707_125816.jpg
Views:	20
Size:	640.9 KB
ID:	2602754   Click image for larger version

Name:	20160708_154318.jpg
Views:	21
Size:	905.6 KB
ID:	2602756   Click image for larger version

Name:	20160708_153124.jpg
Views:	18
Size:	854.7 KB
ID:	2602760   Click image for larger version

Name:	20160708_141336.jpg
Views:	15
Size:	614.5 KB
ID:	2602762  

Click image for larger version

Name:	20160705_140859.jpg
Views:	17
Size:	753.2 KB
ID:	2602764  

DIY FAN Denon X4400 , ATI A 2000 for 7.4.6 SCATMOS Sammy 82" 4K/HDR
L/R: Fusion 15 V2 , C: 88 Special , SL/SR: 88 Special(V2) , RL/RR: F-3, TF/TR: Volt 6's TM: SLX, FH: F4Q4
SUBMAXIMUS V2, ,Submaximus V3,LOWARHORNCustom Dual Driver VBSS,2 x 6000DSP
asarose247 is online now  
post #9 of 10 Old 08-14-2019, 05:24 PM - Thread Starter
Newbie
 
roweaz's Avatar
 
Join Date: Mar 2012
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Quote:
Originally Posted by asarose247 View Post
not all pics I took are in the thread

stabilizing "F"

my defense against "kreg creep"- hit the mark

dry fit of "H"

notice that A is not yet on
and that gap at A-C- kregs, PL3, and long ass 3/4" pipe clamps and blocking and . . .

those black right angles are a rockler product and handy as all get-out
Ok, on lunch today, I did a little HornResp school to understand the numbers for this project. With that I was able to figure that the center of the driver should be 11.81" from the end of Panel B

The measurement between Panel A and Panel B at Panel H should be 2.9".

Yea! Time to get this laid out and start cutting wood!
roweaz is offline  
post #10 of 10 Old 08-14-2019, 06:31 PM
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,200
Mentioned: 843 Post(s)
Tagged: 1 Thread(s)
Quoted: 2942 Post(s)
Liked: 3666
the driver should be as close to the end of "B" without creating any problems, perhaps leaving an inch or so to be able to access the mounting screws.

measurement between A and B at panel H is just a hair under 2.9" on my screen, so that's close enough.

i drew this one up before i had any real sketchup skills, so it is actually a microsoft word drawing. :-)

when you go to place panel B, i'd get the other end of the board in place at measurements "2" and "3", then pivot the board around that point until the center of the driver is 3.23" from "A".

like the other guys have said, the 3.23" measurement is the one that will have the greatest impact on performance, so just try to get that one accurate. all the others can give or take a little.

Listen. It's All Good.
LTD02 is offline  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off