Halair Column - my line array build (20 FR drivers) - diyAudio
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Old 23rd March 2014, 12:27 AM   #1
Halair is offline Halair  Norway
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Default Halair Column - my line array build (20 FR drivers)

I stumbled upon The Two Tower's thread by weesayso and was impressed with the detail, construction details, finish but also by the impressive display of speaker units (holes that is, hope you'll get there soon Ronald!)
His lead me to googe the Ids-25 and also found a lovely set of LA in Denmark...

The desire to build something like that (an array that is...) immediately kicked in and suddenly I had enough Vifa TC9's to pull it off Construction ideas started to emergy but since I am short on spare time (4kids) I knew I had to keep it simple.

Hence I opted for something like this:
Click the image to open in full size.

Wooden floor tiles 2200x180mm in size will be the cabinet sides, top and bottom. MDF will make the front baffle, rear wall and bottom plate/stand support. Well today the actual work began
I have made one front baffle, drilled 20x 76mm (3") holes, trial fitted 20x Vifa, and drilled 80x 2,5mm (3/32") for the mounting screws.

The sides are glued (two tiles form one side) and will be cut tomorrow.
I have taken a few pics of the work today but my computer is acting up (the other oneis occupied by two of the kids...) so I wont be able to share images just yet.

My towers will replace the front stereo channels in my home theatre and since the floor/soffit height is just about 190cm (6'4") my arrays will "only" hold 20x Vifa's. Will update tomorrow with pictures, now its time to snooze...

Last edited by Halair; 23rd March 2014 at 12:33 AM.
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Old 23rd March 2014, 12:40 AM   #2
wesayso is offline wesayso  Netherlands
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Cool! can't wait to see your progress!
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Old 23rd March 2014, 12:45 AM   #3
xrk971 is online now xrk971  United States
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Very cool. What are you doing for amp and EQ?
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Old 23rd March 2014, 01:32 AM   #4
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Cool.

I'll be sure to follow you on your adventure!
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Old 23rd March 2014, 10:50 AM   #5
Halair is offline Halair  Norway
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Pictures from yesterday:

1 - Just home after purchasing wood flooring, these will serve as the cabinet sides.
2 - Wood flooring and TC9s
3 - Slight color variations between the different floor boards
4 - Cutting guide and MDF underneath
5 - Cutting lines for front baffle 1 & 2

I really would like a better and more precise circular saw - and a cutting table!
Attached Images
File Type: jpg flat pack.jpg (109.4 KB, 1333 views)
File Type: jpg vifa tc9.jpg (158.1 KB, 1313 views)
File Type: jpg color variations.jpg (142.7 KB, 1286 views)
File Type: jpg cutting guide.jpg (170.5 KB, 1270 views)
File Type: jpg Front baffle 1 and 2.jpg (196.9 KB, 236 views)

Last edited by Halair; 23rd March 2014 at 10:54 AM.
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Old 23rd March 2014, 10:56 AM   #6
Halair is offline Halair  Norway
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More:

6 - Once the baffle is cut to correct width holes are about to get made...
7 - This is what 20 of those look like
8 - Holes about to be filled - Will my spacing allow the drivers to fit?
9 - All 20 fit, sigh of relief from my end. I could have chosen 84mm spacing and still gotten away with it, each driver now have about 1mm separation.
10 - Underside, holes are 76mm and the drivers fit nicely, the underside of the baffle will be chamfered allowing the drivers to breath better.
Attached Images
File Type: jpg 3 done.jpg (151.7 KB, 247 views)
File Type: jpg 20 done.jpg (159.0 KB, 244 views)
File Type: jpg checking spacing.jpg (199.0 KB, 294 views)
File Type: jpg they fit.jpg (182.2 KB, 341 views)
File Type: jpg unbeveled underside.jpg (169.0 KB, 308 views)

Last edited by Halair; 23rd March 2014 at 11:01 AM.
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Old 23rd March 2014, 11:03 AM   #7
Halair is offline Halair  Norway
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From today:

11 - Front baffle, internal baffle and cabinet sides still unglued.
12- Front baffle have had drivers aligned and mounting holes drilled
13 - Two pre glued floor tiles are being prepared for rough cut and grooves
14 - Parts lined up, the internal bracing will be glued unparallell to each other. this will reduce chance for standing waves and also provide stiffness to the structure. Mounting flange shown
15 - Front baffle on flange with bracing in place, dry fit
16 - Size comparison... Yes, they do go in under the soffits
Attached Images
File Type: jpg parts.jpg (177.8 KB, 263 views)
File Type: jpg 120holes.jpg (152.0 KB, 157 views)
File Type: jpg 230mm.jpg (167.2 KB, 139 views)
File Type: jpg groove 2.jpg (145.2 KB, 179 views)
File Type: jpg dry fit 2.jpg (156.3 KB, 249 views)
File Type: jpg Column vs BW DM604S2.jpg (151.7 KB, 487 views)

Last edited by Halair; 23rd March 2014 at 11:11 AM.
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Old 23rd March 2014, 11:10 AM   #8
Halair is offline Halair  Norway
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Quote:
Originally Posted by xrk971 View Post
Very cool. What are you doing for amp and EQ?
Amp is an Emotiva UPA-5 (5x125W) Unsure wether Ill use two or four channels for the Columns...
MiniDSP or Behringer DEQ2496 is my two top options right now. I don't have a media-PC that I use and need a simple system to operate (read wife and kids) so what ever works and with minimal input required will be the winner...
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Old 23rd March 2014, 11:48 AM   #9
xrk971 is online now xrk971  United States
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Halair,
Awesome progress man! You are quick! I too had some leftover laminate flooring and was wondering how to employ them for speaker builds and a line array is the perfect application. It looks like you really did not have anymore room than for 20 drivers - so floor to ceiling coverage is really what you need. I can say that the miniDSP has been great and once setup properly is very simple (nothing to touch other than volume knob, if desired). The miniDSP also gives you the ability to XO to a sub whereas the Behringer is EQ only.

Hey, where is your Cornu being hung to test? You might want the two tower LA to be main L & R channel and wall mount Cornus for rear L&R duties.
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Old 23rd March 2014, 01:11 PM   #10
wesayso is offline wesayso  Netherlands
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Another week and you'll be ready! Hahaha...
I love the idea of using the Cornu's for rear duty. Diffuse enough for the purpose perhaps. So far I love a HT PC due to all the possibilities it has. But then again, I do not have a stand alone Blu Ray player yet. Only DVD.
Have you thought about the feet or are you planning to fix them between wall and upper ceiling? I'd keep in mind you might want to be able to rotate them a bit for aiming to dial in a wide sweet spot.
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