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Full Range TC9 Line Array CNC Cabinet
Full Range TC9 Line Array CNC Cabinet
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Old 20th October 2019, 05:45 PM   #1011
Halair is online now Halair  Norway
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Quote:
Originally Posted by fluid View Post
Definitely lighter I just hope not too wobbly when upright.
Ages ago there was a specific aircraft that suffered from a particular spar failure. Stress tests showed that the bending forces from flight buckled a sheer web support wall. At the center of this buckling point a crack was allowed to form and this mitigated and proved catastrophic.

Solution? A single, smooth and polished edge hole at the center point of the forces at play, preventing the bending forces to ever meet
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Old 22nd October 2019, 01:04 AM   #1012
tnargs is offline tnargs  Australia
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Quote:
Originally Posted by fluid View Post
Next one underway, I decided to put some holes in the side to try the idea of increasing absorption.

Then I remembered why I decided not to before

Click the image to open in full size.

Ready for glue up

Click the image to open in full size.
I would acieve a similar result by cutting out 25% of the depth of the side panel, to form a gap between side panel and wall.

Capture -- edge cutout.JPG

Last edited by tnargs; 22nd October 2019 at 01:14 AM.
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Old 22nd October 2019, 07:21 AM   #1013
fluid is offline fluid  Australia
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Originally Posted by tnargs View Post
I would acieve a similar result by cutting out 25% of the depth of the side panel, to form a gap between side panel and wall.
The point is to have as a much surface area of the absorbent exposed without compromising the structure of the frame too much. GIK use an ellipse cut into the sides which seems a good solution but the holesaw was easier if messier.

Second panel is finished now, no point in a picture as it looks just like the first one
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Old 22nd October 2019, 04:18 PM   #1014
mlee is offline mlee  Canada
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We need a "like" button on this forum!
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Old 24th October 2019, 01:46 AM   #1015
tnargs is offline tnargs  Australia
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Quote:
Originally Posted by fluid View Post
The point is to have as a much surface area of the absorbent exposed without compromising the structure of the frame too much. GIK use an ellipse cut into the sides which seems a good solution but the holesaw was easier if messier.

Second panel is finished now, no point in a picture as it looks just like the first one
Some people just like to suffer!
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Old 25th October 2019, 12:43 PM   #1016
fluid is offline fluid  Australia
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No more holes on the next two panels as these are for reflection control

Side by side (display only)

Full Range TC9 Line Array CNC Cabinet-img20191025110721-jpg

Moved into better position with mirror

Full Range TC9 Line Array CNC Cabinet-img20191025120252-jpg

Other side

Full Range TC9 Line Array CNC Cabinet-img20191025120548-jpg

No time for measurements as yet but in a quick listening test I had to remove the 60Hz boost I had put into one channel to deal with a null before. Had quite an enjoyable time listening, not right yet but new measurements and redoing the correction should help.

I came across a song mentioned by mark in another thread "Batshit" by Sofi Tukker, I recognised it from the iphone advert, bit of a weird song but sounds awesome when the speaker is full range
Attached Images
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File Type: jpg IMG20191025120252.jpg (340.4 KB, 152 views)
File Type: jpg IMG20191025120548.jpg (375.9 KB, 150 views)
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Old 25th October 2019, 01:21 PM   #1017
Halair is online now Halair  Norway
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Location: Norway
May I suggest a few cool tracks to try?

Billie Eilish
Bad Boy
Bury a Friend

Aurora
The Seed
Winter Child
Through the Eyes of a Child

Looks awesome, I hope you get it all tweaked out soon
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Old 25th October 2019, 01:28 PM   #1018
nc535 is offline nc535
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Join Date: Apr 2011
I like your several shades of grey decorating scheme.
Looks like those panels are deep enough to stand up on their own, which is convenient.
The nice thing about line arrays is the only treatment you need is vertical panels. No hanging things from the ceiling or trying to pad the floor.

The last couple of panels I built were made from 1"x8" fingerjoint pine boards from Home Depot, with 6" thick x 23" paper backed fiberglass stapled inside the frame to close the back with paper. Really inexpensive and quick construction.
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Last edited by nc535; 25th October 2019 at 01:41 PM.
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Old 25th October 2019, 02:00 PM   #1019
Halair is online now Halair  Norway
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Location: Norway
Quote:
Originally Posted by nc535 View Post
The nice thing about line arrays is the only treatment you need is vertical panels. No hanging things from the ceiling or trying to pad the floor.
Indeed, I have hardwood floors and smooth concrete as ceiling - its a feature as far as straight line arrays goes

I do have absorption panels in my room though, corners and all walls in various amounts. Most is behind the listening position as its too close for effective diffusion.
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Old 25th October 2019, 02:03 PM   #1020
fluid is offline fluid  Australia
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Quote:
Originally Posted by Halair View Post
May I suggest a few cool tracks to try?

Looks awesome, I hope you get it all tweaked out soon
Of course, always interesting to know what everyone else is listening to
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