2x 18" LMS Ultra 5400 in 27 cubic foot 15hz vented enclosure build thread - Page 2 - AVS Forum
Forum Jump: 
Closed Thread
 
Thread Tools
post #31 of 46 Old 12-13-2013, 08:52 AM
AVS Special Member
 
N8DOGG's Avatar
 
Join Date: Dec 2003
Location: Canada
Posts: 5,617
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked: 261
Quote:
Originally Posted by notnyt View Post

Silicon vapors can eat surrounds.

that was only relevant with foam surrounds and even that was a stretch at best. It will do nothing to thick rubber surrounds.

Blasting brown notes for 10 years and counting!

N8DOGG is offline  
Sponsored Links
Advertisement
 
post #32 of 46 Old 12-13-2013, 08:54 AM - Thread Starter
AVS Special Member
 
notnyt's Avatar
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 4,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked: 350
Quote:
Originally Posted by filtor1 View Post

not, how far away from the center (between the subs) is the termination of the port?

This is something I have noticed over the years, all car audio related, that one of the drivers would unload sooner than the other and seemed to have a greater variance as the port terminated farther away from the center. In some of the larger ported enclosures I helped build, the drivers closest to the port were always the first to let go of the magic smoke when being driven to their limits. None of the drivers I used were of the caliber of the 5400, I just wanted to start the discussion, if there is any possible issue with mounting them side by side with the vertical port.

It will be almost directly between them if the length ends up where I think it will.
notnyt is online now  
post #33 of 46 Old 12-13-2013, 08:55 AM - Thread Starter
AVS Special Member
 
notnyt's Avatar
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 4,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked: 350
Quote:
Originally Posted by N8DOGG View Post

that was only relevant with foam surrounds and even that was a stretch at best. It will do nothing to thick rubber surrounds.

Agreed, was just answering the question, though.
notnyt is online now  
post #34 of 46 Old 12-13-2013, 08:56 AM - Thread Starter
AVS Special Member
 
notnyt's Avatar
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 4,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked: 350
Quote:
Originally Posted by notnyt View Post

It will be almost directly between them if the length ends up where I think it will.

I mean, I can turn the drivers so they're stacked vertically, but then I wonder if I'll end up with issues since they'll be about 7 feet apart from end to end. Hm. something to consider.

I Think I may do this to keep them equidistant to the port opening.
notnyt is online now  
post #35 of 46 Old 12-13-2013, 09:15 AM
Advanced Member
 
filtor1's Avatar
 
Join Date: Feb 2008
Location: Florida
Posts: 925
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 22
I think as long as it is close, there should be no issues. It was hard to tell from the drawing where the port terminated.
filtor1 is offline  
post #36 of 46 Old 12-13-2013, 01:12 PM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 15,992
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 144 Post(s)
Liked: 857
maybe it just depends on how hard they are being driven.

genelec's top of the line supersub is side slot ported and the drivers are all different distance from the port.

can't say i've heard of this being some great cause for concern.


Listen. It's All Good.
LTD02 is online now  
post #37 of 46 Old 12-13-2013, 09:48 PM
AVS Special Member
 
BassThatHz's Avatar
 
Join Date: Apr 2008
Location: East side of NW Cascades
Posts: 2,641
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 124 Post(s)
Liked: 318
BassThatHz is online now  
post #38 of 46 Old 12-13-2013, 10:08 PM - Thread Starter
AVS Special Member
 
notnyt's Avatar
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 4,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked: 350
I'm going to keep the ports running vertically, and I think I'm going to put the drivers vertical as well. More uniform wave from floor to ceiling yeah?
notnyt is online now  
post #39 of 46 Old 12-13-2013, 10:50 PM - Thread Starter
AVS Special Member
 
notnyt's Avatar
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 4,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked: 350
And if anyone is wondering why no progress yet... something new every day..

Wife driving truck home from Brooklyn. Alternator failure on the side of Southern State Parkway. Good times. Drove it home, though.
☑ Dark
☑ Below Freezing
☑ Traffic flying by 3' away
☑ Broken hood release so can't get into engine bay
☑ Only light from battery flashlight
☑ Cheap emergency toolkit

9faJI35.jpg
notnyt is online now  
post #40 of 46 Old 12-13-2013, 10:57 PM
AVS Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 15,992
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 144 Post(s)
Liked: 857
stormwind13 likes this.

Listen. It's All Good.
LTD02 is online now  
post #41 of 46 Old 12-13-2013, 11:01 PM - Thread Starter
AVS Special Member
 
notnyt's Avatar
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 4,178
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked: 350
notnyt is online now  
post #42 of 46 Old 12-14-2013, 10:27 AM
AVS Special Member
 
lukeamdman's Avatar
 
Join Date: May 2011
Location: Burnsville, MN
Posts: 1,296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked: 104
Quote:
Originally Posted by notnyt View Post

I'm going to keep the ports running vertically, and I think I'm going to put the drivers vertical as well. More uniform wave from floor to ceiling yeah?

I've noticed with the placement of my subs that stacking them produces by far the most uniform response from each sub compared to the other, most of the time within 1-2db of the other across the entire range.

Side by side or one in front of the other it's amazing to me how much their response can differ. Stacked vertically though, always really close.

My vote is a vertical line of drivers.
lukeamdman is offline  
post #43 of 46 Old 12-14-2013, 03:05 PM
AVS Special Member
 
BassThatHz's Avatar
 
Join Date: Apr 2008
Location: East side of NW Cascades
Posts: 2,641
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 124 Post(s)
Liked: 318
Quote:
Originally Posted by notnyt View Post

I think you have me confused with BassThatHZ wink.gif



Nyt is actually secretly upgrading the engine to 1100hp and 0 to 60 in 2.7 seconds for 200mph in the snow, to match his Luxury 8-LMS subwoofer system.
BassThatHz is online now  
post #44 of 46 Old 12-14-2013, 03:41 PM
FOH
AVS Special Member
 
FOH's Avatar
 
Join Date: Apr 2010
Location: Midwest
Posts: 4,745
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Liked: 208
Quote:
Originally Posted by notnyt View Post

real nice 3/4 hardwood ply. unfortunately it's only five ply

I used a 5 ply "hardwood" from Lowes, no issues. I mixed a nice 9 ply, and the 5 ply, in my quad IB attic manifold.

I remember it was Lowes, ... the young man helping me with the ply inquired what I was doing with it. I reluctantly began to explain about subs, and the attic IB manifold, I no more than started and he interrupted and went off on car audio stories rolleyes.gif I listened politely, explained I was into high end car audio in the 70's, early 80's. I shared with him I had a big, multi-way, active, ribbon tweeter, high-power system, w/big dual-coil subwoofer in my '76 Chevette, 30 years ago! He didn't know subwoofers existed back then! Yeah, we had subs in the 70's, ... we had had belts too, we used them to keep our pants up tongue.gif


Best of luck over the weekend with build progress, you've got the chops ... attention to detail, all the design talk, tips and tricks, and build updates are much appreciated. This is one to watch, your Kung Fu is good.

Quote:
Originally Posted by lukeamdman View Post

I've noticed with the placement of my subs that stacking them produces by far the most uniform response from each sub compared to the other, most of the time within 1-2db of the other across the entire range.

Side by side or one in front of the other it's amazing to me how much their response can differ. Stacked vertically though, always really close.

My vote is a vertical line of drivers.

Makes sense to me, I mentioned something similar back in post #10, these big physical elements up front, there may be significantly varying results, due to varying physical configs, interactions, etc. Also, quite likely out of sub band impacts as well.


Good luck with the vehicular issues. We've got a little snow the last few days, I just discovered my 4 wheel drive is acting oddly,.. not fully disengaging properly, in a timely manner. Winter always fleshes out this stuff.
NWCgrad likes this.

------------------------------------
Flat, Deep, Clean, Linear, and Loud
------------------------------------
Active 16.8kw, 7.3 system
(3)Seaton Cat12C up front, (4)QSC K8 sides/rears
(2)Seaton SubM-HP, (4)18" IB
FOH is offline  
post #45 of 46 Old 12-14-2013, 04:22 PM
Member
 
andy497's Avatar
 
Join Date: Jan 2013
Posts: 80
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 16
Quote:
Originally Posted by notnyt View Post

And if anyone is wondering why no progress yet... something new every day..

Wife driving truck home from Brooklyn. Alternator failure on the side of Southern State Parkway. Good times. Drove it home, though.

...

Not fails to mention he upgraded wife's alternator on site with a DIY rotary-to-linear linkage and spare LMS motor assembly.
andy497 is offline  
post #46 of 46 Old 12-14-2013, 06:37 PM
AVS Special Member
 
Reddig's Avatar
 
Join Date: Jun 2009
Location: Hays
Posts: 1,602
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 155
Subscribed.

Always watch all you'r builds with great interest. Looking forward to this one for sure. Wish ya good luck!

JBL Pro Cinema
Reddig is offline  
Closed Thread DIY Speakers and Subs

Tags
Tc Sounds Lms Ultra 5400

User Tag List

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