The making of: The Two Towers (a 25 driver Full Range line array)

[wesayso]

Back on track...

The two towers standing on their own. Still a lot of sanding to do on both towers but it's starting to look like something real.

Another feature visible in this picture is that I left the ability to rotate the speaker in any direction wanted. The speaker is almost turned 180 degrees .
That should help with toe in/out experiments.
In some more detail:

(don't mind the missing bolts on the base, they're there )

[Jaimo]

Are you going Nude plywood + stain or will you attempt to veneer?

[KLBIrd]

I like that rotation feature. Is that a commercial product or custom design?

[wesayso]

I'm going for nude plywood with stain covered with clear polyurethane. Plywood is hard to stain though. Takes some effort, hope my tests have shown me how to do it right.

That rotational base is water yet cut from my drawings, so I guess that makes it custom design. I wanted to be able to play with positioning without rotating the feet. It's not equipped for changes on the fly with the bolts facing downward but I'll manage.

[sakellogg]

uhm..... holy cow! you are my new hero!

[xrk971]

Originally Posted by wesayso

I'm going for nude plywood with stain covered with clear polyurethane. Plywood is hard to stain though. Takes some effort, hope my tests have shown me how to do it right.

That rotational base is water yet cut from my drawings, so I guess that makes it custom design. I wanted to be able to play with positioning without rotating the feet. It's not equipped for changes on the fly with the bolts facing downward but I'll manage.

Put a set screw on the side edge of the base to clamp a round disc mounted to speaker with large hole for disc in base. Then you can adjust on the fly.

[Jaimo]

Originally Posted by wesayso

I'm going for nude plywood with stain covered with clear polyurethane. Plywood is hard to stain though. Takes some effort, hope my tests have shown me how to do it right.

That rotational base is water yet cut from my drawings, so I guess that makes it custom design. I wanted to be able to play with positioning without rotating the feet. It's not equipped for changes on the fly with the bolts facing downward but I'll manage.

I am a huge fan of exposed plywood but it is difficult to get a good finish. Consider filling the ply with some kind of wood filler compound before sanding.

The other challenge is getting the burn marks out. I ended up using a dark stain on my TT plinth in order to hide the burns.

[wesayso]

Originally Posted by Jaimo

I am a huge fan of exposed plywood but it is difficult to get a good finish. Consider filling the ply with some kind of wood filler compound before sanding.

The other challenge is getting the burn marks out. I ended up using a dark stain on my TT plinth in order to hide the burns.

I had saved saw dust and wanted to mix that with wood glue to fill the pinholes etc. But I noticed on test pieces the glue would mess up the stain.
So I went with a dark wood filler .
I'm going for a dark stain as well. The burn marks are all gone though after a week of sanding, pfew....
I do hope to get an even finish. My girlfriend wanted black speakers, they are supposed to be black she said. But I just couldn't do that after seeing how nice the ply looked. It will be a dark brown color, to go with our brasil brown oak floor. I hope to anodize the aluminum black. The feet will be left bare aluminum for now and polished.

The biggest challenge will be to clean the garage prior to paint. You don't want to know how much saw dust is everywhere. I'm considering building a tent from plastic for the paint job.

[wesayso]

Originally Posted by xrk971

Put a set screw on the side edge of the base to clamp a round disc mounted to speaker with large hole for disc in base. Then you can adjust on the fly.

I didn't dare to only trust a set screw with towers 2 m 22 high .
Hopefully, positioning them will be a one time deal.

[graaf]

nice project, pure overkill

Are You going to taper the line in any way (power, frequency)? How are You going to equalize them? Passively, line level, analog, digital?