If i remember correct the damaged transducers belong to another story/build from the past, in below link and picture see that Halair made some nice 20x TC9 arrays back in year 2014 that down the road had some transducers damaged by a cat or dog or whatever it was.
https://www.diyaudio.com/forums/ful...ne-array-build-20-fr-drivers.html#post3864883
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When my youngest boy was 2 and equipped with a ballon stick (the one you get at McDonalds) he decided to poke holes in those he could reach
Those have since been replaced and the bad drivers are now used as test dummies
Some progress:
Last night I sanded the first baffle and tonite I gave it its first coat of primer (epoxy). Also managed to do the sanding on half of the 2nd baffle, which will be completed tomorrow + its 1st coat of primer.
Masked each adjacent driver when sanding, trying to preserve as much as possible of the sharp "edge" the profile have.
Weather is awefull at the moment, no sidepanel cutting possible today or tomorrow...
Last night I sanded the first baffle and tonite I gave it its first coat of primer (epoxy). Also managed to do the sanding on half of the 2nd baffle, which will be completed tomorrow + its 1st coat of primer.
Masked each adjacent driver when sanding, trying to preserve as much as possible of the sharp "edge" the profile have.
Weather is awefull at the moment, no sidepanel cutting possible today or tomorrow...
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@wesayso:
Yeah, every little bit helps - you should know
I have today managed to prep and 2nd coat both baffles which right now is curing downstairs
@Johnnycamp5:
These will get 24 drivers per side, grouped in two sections of 12 so I can use two amp channels per side.
My current line arrays run 20/side and one channel per side.
I am adressing 4 means of improvements this time around, with one single purpose as end-game - a bigger grin when using them :
Why not use 25?
Lack ceiling clearance
Yeah, every little bit helps - you should know
I have today managed to prep and 2nd coat both baffles which right now is curing downstairs
@Johnnycamp5:
These will get 24 drivers per side, grouped in two sections of 12 so I can use two amp channels per side.
My current line arrays run 20/side and one channel per side.
I am adressing 4 means of improvements this time around, with one single purpose as end-game - a bigger grin when using them
:- Better looking
- More driver area (20 -> 24)
- More power to drive them (2x140W -> 4x140W)
- Improved cabinet in terms of more mass / more inert
Why not use 25?
Lack ceiling clearance
Thanks for the feedback - I like them smooth
I know that smooth = more prep work
When the front baffles lie on the floor they look decievingly small/short...
Stone side walls would be totally cool, perhaps for mk3
I have played with the idea of creating a 3D pattern, machined to MDF side panels - see attached image for example
Planned progress for the weekend:
I know that smooth = more prep work
When the front baffles lie on the floor they look decievingly small/short...
Stone side walls would be totally cool, perhaps for mk3
I have played with the idea of creating a 3D pattern, machined to MDF side panels - see attached image for example
Planned progress for the weekend:
- Get the side panels cut to size
- Create the top cover and machine a pair
- Design the speaker base and inserts for the vertical cabinet, these will be cast inside the EG matrix. The inserts will be machined out of 15mm alu and tapped for M10 fasteners.
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Last edited:
Some hard data:
Per array, the weight of the wood (measured) alone = 24kg
Epoxy/Sand matrix (calculated) to 45kg
Mass of drivers = 7,2kg
Moving mass = 58g
Speaker base plate = unknown
This give me a moving mass/inert mass ratio exceeding 1:1300
Surface area exceed a std 15" (but not displacement obviously)
This means soon I wont be able to handle these alone...
Per array, the weight of the wood (measured) alone = 24kg
Epoxy/Sand matrix (calculated) to 45kg
Mass of drivers = 7,2kg
Moving mass = 58g
Speaker base plate = unknown
This give me a moving mass/inert mass ratio exceeding 1:1300
Surface area exceed a std 15" (but not displacement obviously)
This means soon I wont be able to handle these alone...
Halair,
Looks you already have a "road map" of line array speakers in place?
Always projects and ideas floating around upstairs
Just messing around in Fusion360 to get better at it 
First cabinet glued up, waiting for the glue to harden (24hr epoxy)
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