Ekta Grande project/AR-1 variation

[Igor]

Your cnc work already look amazing! My friend and me use 19th century technology hehehe

[Coasttocoast]

Originally Posted by Igor

Your cnc work already look amazing! My friend and me use 19th century technology hehehe

Igor, thanks. I wouldn't have tried this radius style cabinet design without having access to a CNC. Here is how I ended up the day, still a long way to go;

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[Coasttocoast]

For those that might be interested here is a sketch of the driver locations. image.jpg

[Coasttocoast]

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[Coasttocoast]

I couldn't help myself! Had to get the drivers out of the boxes and see how they fit.

A lot of prep on the front baffle. Besides laying up 3 layers of plywood to get to 1 7/8" thick, then routing out for the sides and intermediate braces to mortise into, all the driver holes had to be back-cut to allow the rear of the drivers to breath.

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[Coasttocoast]

I'm going for a deep piano black finish. The speakers will be placed in our living room close to the windows. Here in Honolulu we get mostly sunny days so UV protection is very important. So I'm using Duponts best line of automotive finish.

The plan is 2-3 coats of the primer, 3 coats black basecoat, 3 coats clear, wait 24 sand with 500-600, then 3 more coats of clear, wet sand, then polish and wax.


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[Juhazi]

Looking great, classic black coffin speaker!

How is the humidity in Honolulu? Perhaps some primer also inside the br-box to prevent deformation and decoupling ?

[bigfishe]

Being a body shop owner let me warn you!
Seal the wood with wood rot epoxy sealer then use nason
Ful-pox primer! Careful not to run the primer it's very thin!
This should be a five day process

[Coasttocoast]

Originally Posted by Juhazi

Looking great, classic black coffin speaker!

How is the humidity in Honolulu? Perhaps some primer also inside the br-box to prevent deformation and decoupling ?

Juhazi, thanks for the reply. The interior of the cabinet is entirely covered with 2 layers of 3M 08840 sound dampening material. (Bitumen). The pads are self adhesive but I sprayed the complete interior with contact cement to both seal the wood and make sure pads never come loose. The backside of the front baffle will be sprayed with primer before being permanently attached. Here is a pic of what the material looks like;

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Humidity in Honolulu is not near as bad as in some other cities in the US, but a concern with anything that could be affected by it.

[JonasKarud]

Nice work!

Looking forward to see the end result!