Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Full Range TC9 Line Array CNC Cabinet
Full Range TC9 Line Array CNC Cabinet
Full Range TC9 Line Array CNC Cabinet Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th September 2019, 10:43 AM   #991
wesayso is online now wesayso  Netherlands
diyAudio Member
 
wesayso's Avatar
 
Join Date: Jul 2007
This is a RePhase exercise right? Not a real null in the mains, just a virtual one done by EQ, right?
__________________
Use Science to design your speakers and they will sound like a piece of Art...
  Reply With Quote
Old 28th September 2019, 12:33 PM   #992
BYRTT is offline BYRTT  Denmark
diyAudio Member
 
BYRTT's Avatar
 
Join Date: Dec 2009
Full Range TC9 Line Array CNC Cabinet
Not shure but could imagine phase of that dip maybe can be a little wild, what i mean is its not pure linear phase and not pure minimum phase but a mix of both, guess a chance to repair that then into REW you need to divide a carefull alligned measured line array IR with textbook target of a carefull alligned target curve IR, to ignore HF stopband from measured IR then filter the two IR before the divide command for example 1/1 at 125Hz and export that as frd file, then over in Rephase use whatever mix of minimum phase and linear phase filters it takes to get that hump flat as pancake in both the amplitude and phase domain, below should be some pointers

Full Range TC9 Line Array CNC Cabinet-1060-png
Attached Images
File Type: png 1060.png (60.8 KB, 280 views)
  Reply With Quote
Old 28th September 2019, 12:56 PM   #993
fluid is offline fluid  Australia
diyAudio Member
 
Join Date: Jan 2009
Quote:
Originally Posted by wesayso View Post
This is a RePhase exercise right? Not a real null in the mains, just a virtual one done by EQ, right?
No the null is real, it appears in the averaged measurement and DRC does not try and correct it.

These images show it, 6 cycle FDW to clean up the phase and unwrapped to see the cliff more clearly. The exercise part is combing the real corrected measurement with pure impulses to represent a perfect sub.

Full Range TC9 Line Array CNC Cabinet-average-eq-jpg

Full Range TC9 Line Array CNC Cabinet-flat-test-unwrapped-phase-jpg



Quote:
Originally Posted by BYRTT View Post
below should be some pointers
I'll have to read that one a few times to understand it I don't think it can be corrected electrically, but needs a combination of absorption and mitigating with the sub channel if possible. I have had no success with dividing impulses before, it always sounds wrong somehow.
Attached Images
File Type: jpg Average no EQ.jpg (101.0 KB, 536 views)
File Type: jpg Flat test unwrapped phase.jpg (93.4 KB, 283 views)
  Reply With Quote
Old 6th October 2019, 11:23 AM   #994
fluid is offline fluid  Australia
diyAudio Member
 
Join Date: Jan 2009
Some progress has been made in the physical world

Pile of Glass fibre batts

Full Range TC9 Line Array CNC Cabinet-img20190906160416-jpg

Pile of MDF

Full Range TC9 Line Array CNC Cabinet-img20190906160433-jpg

MDF cut for sub cabinets and absorber frames

Full Range TC9 Line Array CNC Cabinet-img20191006173818-jpg

Full Range TC9 Line Array CNC Cabinet-img20191006173830-jpg
Attached Images
File Type: jpg IMG20190906160416.jpg (447.3 KB, 243 views)
File Type: jpg IMG20190906160433.jpg (411.7 KB, 245 views)
File Type: jpg IMG20191006173818.jpg (361.7 KB, 240 views)
File Type: jpg IMG20191006173830.jpg (395.1 KB, 241 views)
  Reply With Quote
Old 6th October 2019, 02:33 PM   #995
wesayso is online now wesayso  Netherlands
diyAudio Member
 
wesayso's Avatar
 
Join Date: Jul 2007
Big plans!
__________________
Use Science to design your speakers and they will sound like a piece of Art...
  Reply With Quote
Old 6th October 2019, 03:58 PM   #996
nc535 is offline nc535
diyAudio Member
 
Join Date: Apr 2011
plans for big subs?
__________________
My Synergy Corner Horns and Bass Bins
http://www.diyaudio.com/forums/multi...bass-bins.html
  Reply With Quote
Old 6th October 2019, 10:08 PM   #997
fluid is offline fluid  Australia
diyAudio Member
 
Join Date: Jan 2009
Quote:
Originally Posted by wesayso View Post
Big plans!
I should end with 3 panels 560 x 2260 x 180 (whd) and 5 panels 430 x 2260 x 150

That's what I got out of two bags of glass fibre and three sheets of MDF

Quote:
Originally Posted by nc535 View Post
plans for big subs?
Roughly 500 x 500 boxes for the 15" drivers, reasonable compromise between size and efficiency
  Reply With Quote
Old 6th October 2019, 10:16 PM   #998
DonVK is offline DonVK  Canada
diyAudio Member
 
DonVK's Avatar
 
Join Date: Jan 2017
Location: Ottawa
Are those panels for your null? or general room treatment?
  Reply With Quote
Old 7th October 2019, 01:05 AM   #999
fluid is offline fluid  Australia
diyAudio Member
 
Join Date: Jan 2009
The original idea was for corner traps and first reflection control. Having measured, the ETC shows less early reflections than I thought but a few bass nulls, so I will try to see if I can reduce the front wall null enough to be dealt with by other means.
  Reply With Quote
Old 18th October 2019, 06:14 AM   #1000
fluid is offline fluid  Australia
diyAudio Member
 
Join Date: Jan 2009
Here are some progress shots of the absorbent panels, one completed so far

Basic frame with backing fabric attached (excuse the perspective the divider is in the middle of the frame)

Full Range TC9 Line Array CNC Cabinet-img20191018130140-jpg

Filled with fibreglass insulation

Full Range TC9 Line Array CNC Cabinet-img20191018130646-jpg

Front fabric attached

Full Range TC9 Line Array CNC Cabinet-img20191018135911-jpg

In room next to array for scale, even with no bracing these things are awkward to move around.

Full Range TC9 Line Array CNC Cabinet-img20191018140310-jpg
Attached Images
File Type: jpg IMG20191018130140.jpg (438.4 KB, 159 views)
File Type: jpg IMG20191018130646.jpg (510.9 KB, 156 views)
File Type: jpg IMG20191018135911.jpg (461.4 KB, 156 views)
File Type: jpg IMG20191018140310.jpg (320.8 KB, 157 views)
  Reply With Quote

Reply


Full Range TC9 Line Array CNC CabinetHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Full range line array inrank Full Range 43 16th November 2017 08:25 AM
Full range line array in a tube carpenter Full Range 44 7th January 2014 03:19 PM
Omni full range line array??? Melo theory Full Range 42 25th November 2012 06:44 AM
Full-range line array? mazeroth Full Range 20 1st November 2004 04:47 PM
line array with full range drivers? leadbelly Multi-Way 9 25th January 2003 05:48 PM


New To Site? Need Help?

All times are GMT. The time now is 11:34 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki