Onken Cabinet Build

marantzfan

Administrator
Staff member
I’ve long said that my endgame speaker, would look something like an Onken 360l cabinet with an Altec 416, beneath a big multicellular horn and a pair of Altec 288’s.

This whole pandemic got me thinking... what in the hell am I waiting for? Sell some stuff, make some space and let’s make it happen. Life is short.

I picked up a pair of 291-16k drivers a little while back at a very fair price, so there’s one step closer. Once I swap out the diaphragms, these are effectively 288-16k’s.

The next and most affordable step in this process, is building the Onken cabinets. I found a set of the original Hiraga plans which I’m building from.


The first challenge, was finding the appropriate 25mm (1”) thickness of Baltic Birch plywood. After striking out several times trying to find any locally, I remembered that my neighbor manages a large furniture manufacturer and has offered to help me source lumber. I asked him, and sure enough he had a local wholesale source. Get this... $52 for a 4x8 sheet!

Based on the cut list I got from cutlistoptimizer.com (which is free), I needed 3 4x8 sheets. I bought 4 just because the price was so attractive.

EDIT: Added the cutlist in PDF format to this post for future builders!

@Audionut went WAY out of his way and was likely late to a meeting because he helped me haul these home in his truck at a moments notice. Huge thanks again for that Jose!

So, last weekend I began making sawdust...E47ED9CC-52D6-45B8-86FD-C3D8B8C2B93B.jpeg280BBFF7-89B7-4C96-8AFD-E69687482E39.jpeg071F7573-6003-4076-83AC-0F490F184676.jpeg
 

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  • Onken Cutlist.pdf
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Redboy

Knobophobe
You guys are FAR too kind! What’s the old saying, “necessity is the mother of invention?”

I just don’t have room for a table saw or a drill press, so this is how I’m living. Lol
Get yourself a track saw in the meantime... You’ll like what it does for this kind of project! :)

...’course, your wood’s already cut now. Maybe you don’t need one!
 
Get yourself a track saw in the meantime... You’ll like what it does for this kind of project! :)

...’course, your wood’s already cut now. Maybe you don’t need one!

Absolutely, if you don't have room for a table saw, a track saw is a fantastic idea.
 

Wntrmute2

Not So Mediocre Member
Very interesting article. I'm surprised they didn't specify screw dimensions and brand. After all, they told you what color it should be! :popcorn
 

marantzfan

Administrator
Staff member
I’m going with 1 5/8” deck screws. The plan is to countersink them and veneer over them on the top and sides.

Still debating how I want to handle the fronts. I’m not a fan of screw heads showing...
 
I’m going with 1 5/8” deck screws. The plan is to countersink them and veneer over them on the top and sides.

Still debating how I want to handle the fronts. I’m not a fan of screw heads showing...

I'm considering an Onken build, and my preliminary plan was to make the baffles with threaded inserts in them. This would allow me to bolt them in from the inside through some mounting cleats as @UncleBingo suggested.

I would make the rear panels removable, because I don't care if fasteners are exposed on the rear.
 

marantzfan

Administrator
Staff member
I'm considering an Onken build, and my preliminary plan was to make the baffles with threaded inserts in them. This would allow me to bolt them in from the inside through some mounting cleats as @UncleBingo suggested.

I would make the rear panels removable, because I don't care if fasteners are exposed on the rear.

That's avery good idea! I think that is the route I will be going as well.
 
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