Apollo Construction Diary - Page 64 - diyAudio
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Multi-Way Conventional loudspeakers with crossovers

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Old 22nd April 2013, 11:18 PM   #631
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Not sure why but here they are again.
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Old 23rd April 2013, 08:08 AM   #632
sploo is offline sploo  United Kingdom
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Superb work as always Ant.

BTW The black plate; how long did that take to machine, and what have you painted it with?

I've often found the edges/corners on painted metal to rub off pretty easily - hence my question.
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Old 27th April 2013, 10:41 PM   #633
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Here's an update on the Apollo.

Shot of the internals. There's a relatively loose fill of stuffing for the sealed subs and you can make out the lead sheet attached to the walls. The mid compartment is further treated with bitumen sheet and foam.

Click the image to open in full size.

Going over the cabinets and carefully filling any imperfections, adding finishing touches and then sanding from 80grit up to 300.

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Last off is checking it all bolts together and fits. This one is now ready for paint. Its missing the foot but I've a bunch of hassle sourcing 50mm MDF. Got it in hand now though and should have that done over the next week. Because of the weight of the speaker the foot will have to be reinforced with 20mm aluminium. This will also provide a sturdy fixing point for Cerabase feet.

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Old 27th April 2013, 10:44 PM   #634
SirByrd is offline SirByrd  United States
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Stunning.
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Old 27th April 2013, 10:48 PM   #635
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Quote:
Originally Posted by sploo View Post
Superb work as always Ant.

BTW The black plate; how long did that take to machine, and what have you painted it with?

I've often found the edges/corners on painted metal to rub off pretty easily - hence my question.
Hi Gordon

Machine time was quite long compared to MDF but you have to go a lot slower and lighter. I did 8 parts in a day with each taking about 30-40 minutes. Most of that was the engraving - painfully slow.

They're sprayed with clear etch and then regular clear coat. If you don't etch then the paint will sit on top of the alu and flake off eventually.
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Old 28th April 2013, 07:17 AM   #636
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Hi Shin

For terminal panels can you ink fill engravings? I'm trying to find somewhere to CNC terminals from plain anodised aluminium and then infill in black an etched logo.
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Old 28th April 2013, 08:52 AM   #637
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Quote:
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Hi Shin

For terminal panels can you ink fill engravings? I'm trying to find somewhere to CNC terminals from plain anodised aluminium and then infill in black an etched logo.
I imagine you could. Would have to be careful how you go about filling the engraving since you wouldn't want to sand that nice anodised aluminium, well not unless you fancy anodising it again.
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Old 3rd May 2013, 11:00 PM   #638
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I've just finished reading this from start to end, and I've got tool envy. Your CNC router/mill is brilliant, and I could watch that working all day. Those machines have a much underrated elegance of movement.

As for the speakers - Wow
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Old 4th May 2013, 03:32 AM   #639
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Bit of a random update since I've been working on a bunch of stuff.

First off is a better shot of the Apollo in daylight. These things are just immense. Really, really glad I don't have to find a home for them to live because I certainly couldn't afford the mortgage. I'm mostly here doing this on my own and manoeuvring them around has become an art. If there's anyone around they certainly end up getting roped into 'shifting' them. When I do have to go solo I've found looking at how they the Egyptians moved materials for the pyramids has helped a lot

Click the image to open in full size.

Moving on I've got the first set of cabinets done for the One.10 and One.20. Its taken a ton of hours testing, designing, listening, tearing it down and starting over to get to this point but its finally coming together. Really happy with how the code turned out on the CNC too, there's a few small tweaks I'd like to make but these are mostly to simplify and improve the repeatability of construction. I've already made the changes to the models and code so the next one's will go together even smoother. Absent is the larger One.30 but with all I've got going on right now I think those one's will have to wait till the Apollo are finished.

Even though the One.10 is small by most standards and could have forgone the bracing, especially with 25mm thick material I thought it could still definitely benefit from it.

Click the image to open in full size.

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Here's a quick test fit with the baffle pattern destined to be used to make the molds. Everything lines up so that's looking good too.

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Next is the One.20. Cabinets turned out great and the baffle master is a perfect fit.

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I've had a redesign of the foot for One.20 and 30 too. The old one was more hassle to construct and machine as it was really designed before I had the CNC and so was intended to be done with hand tools. I took the opportunity to beef it up a little at the same time. Its now 50mm rather than 36mm thick.

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Old 4th May 2013, 08:48 AM   #640
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Outstanding work Shin. Have you decided on a final color and finish?
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