3-Way Co-ax Floorstander

@stv uncanny isn't it!?

Last time I used Montana Gold Reef acrylic but I am still finding overspray years later. I opted for Rustoleum Peacock Suit furniture paint this time which is way less mess. They are much closer to each other in colour IRL.

1741165717160.png
1741165731614.png


I'm quite impressed with this furniture paint, though. Only took two coats and its looking ready for some top coat.

@Harry72 I had considered that but it takes away from my totem image in my mind. Let's see what happens though, I am leaving it fairly open atm.

@6thplanet @AlmaAtaKZ Thanks! The placement of the drivers is a little odd, I wanted to keep them as central to the COG of the cabinet as possible which does make it look uneven from front to back but hey - tbhat side won't be seen that much.
 
Grille prototype done!


I used the same method as before - machining it out of 12mm MRMDF with steps for the staples to tuck into. The difference this time is that the magnets also serve as risers, making the grille flush (ish) with the baffle while sticking directly to the woofer chassis.


With the material stretched over the 5x8mm magnets, they have a little bit of give, allowing me to lift them out using magnets embedded in the front of the grilles. I really thought I’d painted myself into a corner when I realized I had no way of getting them out…


This one is a bit rough around the edges, but when I make the final four, I’ll finesse the design.

1742388205994.jpeg
1742388233913.jpeg

1742388264753.jpeg
1742388296323.jpeg

1742388364839.jpeg
1742388393319.jpeg

1742388425854.jpeg
1742388442972.jpeg
 
Grilles done.

These are only 155mm in diameter so getting the staples in the right spot was tricky. Frames painted with black board paint (super matte).

What I feared most happened - twice:

  1. Over-sanding made the baffle uneven, so I had to set each grille’s height individually with the magnets floating in epoxy until it set.
  2. A couple of magnets pierced the material, but since the grilles aren't meant to be removed so it's not a real issue.

Also, the clear coat is getting right on my proverbials.


1742984720616.jpeg
1742984744105.jpeg
1742983366323.jpeg
1742983395228.jpeg

1742983423943.jpeg
 

Feet / Outriggers


1742987754106.jpeg


I’m after a specific type that’s already available to buy, so I have two options:

1. Buy the Dayton Audio OA-4 here ~£75

Pros: Ready-made with a nice finish. Quick.
Cons: Expensive for my needs (I don’t need the spikes) and less fun since it's pre-made.

2. Make my own from 6mm aluminium ~£280

Pros: I get to make them myself. I'd get to buy new tools.
Cons: I'd need to buy a disc sander for shaping and taps for threading, increasing the cost.

Additional Details

For both options, I plan to use either:

  • M8 DIN 653 thumb screws with 1mm rubber sheet on the bottom
  • Hard rubber buffers (25mm diameter x 10mm height)

1742987818129.png
1742987905750.png


3. Any suggestions?

 
I found a way!

I always try to include a new skill in each project, and I was worried I wouldn’t manage it with this one. But I ended up squeezing in a few, so I’m very happy:
  • Having a 3D design printed
  • Machining aluminum on my router
  • Cutting threads
At first, I made a 3D model just to see how much some of the Chinese fabricators would charge — but the quotes came back way too high. Once I had the file, I thought, hmm, what’s stopping me from using it as a template?

I copied it to birch ply, rough cut the aluminum bar to shape, then used a pattern cutter. For the first pass, I wrapped the template in Kapton tape, then removed it for a wafer-thin climb cut. The finish isn’t amazing, but it’ll sand out — and it’s going to be painted anyway.

Tapping was entirely new to me, but I’ve watched over 1000 hours of machining videos on YouTube... so that makes me an expert, right?

It took a bit of effort to figure out how to position everything precisely, but the jig worked well.

Now, time to sand, etch prime, paint, and top coat.

1744031595781.jpeg
1744031616874.jpeg

1744031648037.jpeg
1744031711510.jpeg

1744031741052.jpeg
1744031757561.jpeg

1744031799706.jpeg

1744032211262.jpeg