The making of: The Two Towers (a 25 driver Full Range line array) - Page 11 - diyAudio
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Old 25th October 2013, 01:23 AM   #101
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Loving the color.
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Old 25th October 2013, 01:47 AM   #102
a.wayne is offline a.wayne  United States
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Old 4th November 2013, 03:41 PM   #103
wesayso is offline wesayso  Netherlands
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A week ago I dropped off the aluminum for the baffles at my friends house. He won't be able to start right away so I got to learn to be even more patient than I have been so far .

After working out the last details on the enclosures:
Click the image to open in full size.
(painted the bottom black as it was seen in the polished aluminum feet)

I decided to park the enclosures in the living room for the time being...
Click the image to open in full size.
(it is more or less where they will end up but I will play with aiming to the far seat for imaging,
hopefully creating a large sweet spot on my couch)


So all this is giving me some time to work out the best damping materials. I have started on a test enclosure to measure the different materials and combination of them.
I have:
Real wool felt ~7 mm thickness 15 m2
Fibreglass insulation material
Twaron angel hair

Hoping a test with a behringer microphone and REW and/or True RTA will help me decide the best way to incorporate the materials.

Any suggestions or tips are welcome!

Last edited by wesayso; 4th November 2013 at 03:46 PM.
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Old 4th November 2013, 11:54 PM   #104
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Quote:
Originally Posted by wesayso View Post
Any suggestions or tips are welcome!
Linkwitz suggests considering various commercial filter materials as they have well behaved properties at certain flow rates. They might be rather useful to damp the vertical flow between ajoining speaker sections.
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Old 5th November 2013, 10:38 AM   #105
wesayso is offline wesayso  Netherlands
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Thanks for that! I had not seen that before. If nothing else it gave me some new ideas.
It won't be easy and/or cheap to find the materials that are mentioned but I'll look into it anyway.

Last edited by wesayso; 5th November 2013 at 10:42 AM.
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Old 5th November 2013, 09:07 PM   #106
koldby is offline koldby  Denmark
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will there be any flow between ajoining speaker sections at all, when they all recieves the same signal and they are all identical?

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Old 5th November 2013, 09:21 PM   #107
wesayso is offline wesayso  Netherlands
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Probably not much if any, although different opinions do exist. Original plan was to use the wool felt in those locations. That's why I got it.

I had plans to finish my test enclosure today but had to work on my car. My car is 31 years old so every once in a while something breaks. My after market alarm (13 years old) decided to quit on me leaving me with a car that wouldn't start due to circuit breakers.
It might be related to the car being outside all summer/early fall while I was building the enclosures in the dry garage...

Got the car running again so hopefully I will continue with the test enclosure tomorrow.

Last edited by wesayso; 5th November 2013 at 09:44 PM.
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Old 7th November 2013, 06:22 PM   #108
gninnam is offline gninnam  United Kingdom
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Loving the work you are doing and will be keeping a close eye on your thread
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Old 13th November 2013, 10:54 AM   #109
wesayso is offline wesayso  Netherlands
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Today I'm going to show a few pictures that really hurt me. Not the type of pictures I wanted to show obviously. But to possibly prevent others to encounter the same problems I just have to.
Click the image to open in full size.
Click the image to open in full size.

One of the towers is broken in half. There is a 2 mm gap right about in the middle. Yesterday evening they were still fine, although I usually knock on them before going to bed to hear what the enclosure sounds like. The sound was high pitched. So I figured the enclosure was under some stress.
They were both in one piece though.

This morning I found one of the towers broken almost exactly in the middle.
Trying to figure out what to do next...



I always knew it could happen. I had some doubts about the threaded rods but figured I had enough rubber at both ends to counter the expansion/crimp. It obviously wasn't enough.

Last edited by wesayso; 13th November 2013 at 10:56 AM.
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Old 13th November 2013, 10:55 AM   #110
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That's a real shame, especially given all the effort you put into trying to avoid this kind of thing. Was it the change in rooms, perhaps? Anyway, I hope you work out some kind of fix.
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